Or fastest delivery Thu, Feb 23 . Add to Cart. There are 4 replacement spark plugs for Briggs & Stratton BS-OHV. I listed them from Hot to Colder. carbons are small and more dense material and hurt more by not being there and too much arcing which makes the coil work harder and heat more. We can ship to any address in Australia. In this temperature range, no new deposits are formed and those existing will be burnt. Stens 130-124 Bosch Spark Plug REPLACES: BOSCH WSR6F DOLMAR 965603021 GB WSR6F MAKITA 965 603 021 STIHL 11104007005 STIHL 1110 400 7005 Briggs & Stratton. "headline":"Spark Plug Cross Referencing", 18MM non resistor spark plugs: Champion D23 = AC C88L or Autolite 378 Champion D21 = AC C88 or Autolite 377 Champion D18Y extended tip = Autolite 3116 Champion D16 = AC C87 or Autolite 376 or Denso L14U For gasoline stay with the hotter plugs and not the D16. There was a problem completing your request. Another iffy cross unless you have them in hand to compare. Other layered metal cores were used in the electrode part of the spark plug to also give longer electrode life to the plug. A part of the equipment tests is often formed by a starting capacity test carried out in a freezing chamber, as well as operation tests. Best wishes yall, great discussion going. 37 $6.37 $6.37. 6 2023 . If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Hotter NON resistor plugs, keeping the temperature over 180 degrees, and not running the carbs anymore richer then necesary can help reduce premature plug fouling which is a problem ESPECIALLY when using low energy Magneto ignitions. Some parts of this page is temporarily unavailable. I write tonight for all to hear -- men like Duane Larson and Glen Schueler have devoted an untold amount of hours trying to bring to us the vey best recommendations in spark plugs and magnetos. RFI, Radio Frequency Interference, the tac,tac,tac you hear on radio speakers around a non resistor type ignition source is what the resistor or RFI suppressor type spark plug was made to control. performance upgrade auto crossover chart ac delco to e3 ac delco e3 ac delco e3 ac delco e3 y 41-947 e3.54 41-948 e3.54 41-950 e3.53 41-952 e3.53 have been running the autolite 388 with no apparent problem but maybe i am damaging something and don't know it yet. If I am not mistaken now, plugs simply have a 4-digit code, such as "4220" which used to be WR9DP as one example. * ENVELOPES when selected as a method of Shipping will not be covered from All Mower Spares. Cross Reference Table 1. B-2 (3110) NGK B-2 (3110) STANDARD SPARK PLUG / BOUGIE STANDARD.. $3.74 U.S. Funds . Bobby Gerhart leading the way again, Powered by Brisk Premium Multi-Spark Plugs! "@type": "ImageObject", Please use the navigational links to explore our website. Brand New. Troubleshooting Defective Spark Plugs Menu. Electronic (and electrical) devices that send energy from one point to another in the ignition system send it through a network that resists the transfer. Zones of spark plug fouling and self-cleaning zone depending on the air/fuel ratio and on the spark plug insulator tip temperature. Questions & Answers for the Briggs and Stratton Power Products 311419GS Ask us about the Briggs and Stratton Power Products 311419GS SPARKPLUG. Part# NGK . (PatB). And what is a resister plug, anyway? Tip - I rotate plugs between the left and right cylinders frequently. Stock: 4 Briggs & Stratton Part Number: 311419GS Title: Briggs & Stratton 311419Gs Sparkplug WEBSITESTATUS: SPECIAL ORDER Weight: 0.0700. All Freight options on check-out are calculated from the time of dispatch not the time of order. FREE delivery Mon, Feb 27 on $25 of items shipped by Amazon. I have also been running these for years way before microsoft or the internet was formed and I just haven't had any problems. All rights reserved. We do not count Saturday and Sunday as a day which items can be dispatched due to freight carriers not being able to collect from our store. Spark Plug Interchange Chart. Guys can run any kind they want but it's a parts warranty issue to me is why the non resistor plugs and metallic core wires are recommended with a mag. Trending price is based on prices over last 90 days. DUE TO DIFFERENCES IN DESIGN AND MATERIALS THE SPARK PLUGS OF VARIOUS MANUFACTURERS DO NOT HAVE EXACTLY THE SAME HEAT RANGE. The cross references are for general reference only, please check for correct specifications and measurements for your application. PS Hope the fires stay out of your neck of Texas. You can go directly to Autolite and it will tell you that their 388 is a RESISTOR plug. Autolite 388 and 386 are resistor type and NOT recommended for mag use although suppliers will tell you they cross to a D21 do NOT use them on a magneto! The manufacturers now may tell you different but they just want to sell you more new parts! "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=jd&th=200592", Try the 18mm ones I listed above. International OrdersWe reserve the right to quote additional fee's or refund any order that may be too expensive to ship into certain countries. Aircraft, military and industrial magneto ignitions have used non resistor shielded spark plugs and wires for years to control RFI, Radio Freqency Interference also. Re: bosch to ngk spark plug cross reference. NGK Cross Reference Catalog; NGK to NGK Iridium Cross Reference; Show AllNGK Cross Ref. The mixing ratio of fuel and air is very low in this case (rich mixture). Racing Spark Plug Cross Reference Chart - Dragstuff Racing Spark Plug Cross Reference Chart by John Heard, Last Updated Dec 29, 2014 Autolite, AC Delco & Champion to NGK AC Delco to NGK Heat Range Reference NGK Heat Ranges - The larger the number after the dash the colder the plug is. In the electrical (and electronic) worlds we call this Impedence Matching. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. The spark plug Cross References are for general reference only. May get by with it for a few runs on a old tractor fine but still not good on a magneto coil. USD 22.82. You want wire in your wires ! Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Brisk Spark Plug Style Identification #2. Older cars had lots of metal surrounding the engines and that would suppress some of the RFI but later lighter made vehicles and higher voltage pulse ignitions and composite body constructions don't suppress the RFI well. In addition the Mags have to work harder and can run at higher temperatures when one uses resistor wires or plugs !!!!!!!!! Too high temperature of the insulator tip is undesirable. On the other hand, the combustion deposits previously set will burn if the insulator tip temperature rises above 475 C. In order to achieve the correct temperature of the insulator tip for a given engine, the spark plugs are produced in various thermal values. Genuine, OEM Briggs & Stratton parts. Both conditions are directly related. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. And maximum energy transfer occurs only when there is a match between the sending end resistance and the receiving end resitance. 311419GS GTIN 0024847909968 UPC 0024847909968 eBay Product ID (ePID) 1555977707 Product Key Features Color Multicolor Type Spark Plug Dimensions Item Height 1 Length 1.00 All listings for this product Listing type: Buy It Now Condition: New Briggs & Stratton OEM 311419GS Sparkplug $17.11 Free shipping PLEASE NOTE - If shipping calculator can not work out freight costings to your post code please notify us so we can manually work out costings and fix the product link. lol. Reply #3 on: July 24, 2007, 05:24:17 . In order to ensure sufficient insulation between center and ground electrodes it is necessary, to keep the insulator tip (the part of the insulator projecting into the engine area) within an optimum temperature range. Any excess heating will kill the coils breaking down the insulation inside between the windings. All goods will be delivered by Toll, Australia Post, Star Track or local couriers unless otherwise requested. The store will not work correctly in the case when cookies are disabled. 'Sorry! We are sorry. Whoa nellie, I go to a fire meeting and come back and lol.. Mike, Kurt, others, I know many are still going to run the 388, 386 and other resistor plugs and carbon core wires on a mag but it's just a no no. PRODUCT DESCRIPTION E3.10 is a 14mm, 0.375" reach plug with a gasket seat. Mike Murillo: First to 6.40's with Brisk Racing Spark Plugs! All Mower Spares16 Argyle StreetCAMDEN NSW 2570AUSTRALIA. Choose brandname and start typing model number. However there will be no refunds on electrical components that have been fitted or tested or incorrectly ordered without authorisation. Found some other Bosch plugs but too cross to a colder plug in AC and Champion catalogs although Bosch listed them for JDs. A tractor with an engine which is not in the best of shape may gain from a hot non-resistor plug, copper core wires, and if using a distributor system (or a gear-reduction mag) having the center electrode of the plug at negative voltage with respect to ground will at least have the plug/ignition system optimized. May get by with it for a few runs on a old tractor fine but still not good on a magneto coil. You are correct about the autolite book and web site both cross the D23 to the 388 and it also says they are resistor type. The fires were 150+ miles from here E NE of Amarillo but we are still dry for the potential of the same disaster. High temperature results in pre-ignitions of the air-fuel mixture and further compression of the mixture already ignited leads to high temperature, which can cause serious damage to the engine. Please check that your postcode is in the overnight regions before placing any orders. Brisk Silver Racing Powers Evo Performance's Quickest 2013 Mustang "The Green Goblin" !! Zone of fouling with non-evaporated fuel - this is the zone of the highest degree of fouling for spark plugs. B-4 (3210) This website is using a security service to protect itself from online attacks. Is there a chart availble that shows the plugs for different models ( A,B,G etc.) Spark plug cross reference Search spark plug cross reference Type in the spark plug model you want replacement for. They have a longer insulator tip and they achieve a temperature higher than the deposition zone relatively fast. Non resistor plugs may have a small sealed gap inside also but not as much and plug core construction will differ having a solid metallic core or laminated metallic cores with little resistance. Found some other Bosch plugs but too cross to a colder plug in AC and Champion catalogs although Bosch listed them for JDs. The AC Delco catalog offers little info. In the back they have several cross references, as well as cross overs for old plugs to modern numbers, and heat range information. When mag coils were no longer hand wound and they started making the coils on computerized machines and encasing them in plastic a whole batch of bad coils could get put out there and the warranty problems got worse too. So when you use a resistor plug in plug as an element in a system designed for a non-resistor plug, you place an added unknown into the total circuit. NOTE: Cross references are provided as a GUIDE ONLY. Inert zone - in this zone, there does not occur any setting of combustion deposits on the insulator tip and there does not occur any self-cleaning either. Any use of this cross reference is done at the installers risk. An important parameter of this heat range is given by the so-called self-ignition value. Most modern resistor plugs can not have the resistance measured properly with a common low voltage ohmmeter and it takes a high voltage pulse (1Kv) to first be applied to eliminate contact resistance and false high readings. A ABARTH ALFA ROMEO ASTONMARTIN AUDI/VW B BMW C CHRYSLER CITROEN D DAIHATSU DUCATI F FERARRI FIAT FOMOCO FORD G GM H HAMP HONDA Spark Plug Basics. - : $49. { How bout the rotor in a Wico magneto? And an ignition system like that can't hurt on any tractor. Bosch 0356351031. Regards to all! JavaScript seems to be disabled in your browser. You guys might try this websight. ol' guy, For modern spark plug interchange information the best reference is a Champion catalog. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. As far as plug brand we have had some engines that seemed to like one brand over another while the same engine on another fuel type didn't like it. So when you use a resistor plug in plug as an element in a system designed for a non-resistor plug, you place an added unknown into the total circuit. Genuine, OEM Briggs & Stratton sparkplug, part# 311419GS. If you need to make a return, please email All Mower Spares for a Return Authorisation Number. It will generally be with in 2-3 days (depending on weight and size of the order). ", And what is a resister plug, anyway? Strictly Performance's worlds fastest 2011 GT, Powered by Brisk Racing! HOR Cross Reference Table. Check for correct application and spec/measurements. Please use a different way to share. The output impedance is no longer a match to the impedance of the magneto, and when a mis-match occurs, some of the energy which was to have been transferred is reflected back into the magneto. } Australia post usually allow upto 7 working days for regular parcels. Some of those shielded type spark plugs are take apart type allowing for a replaceable resistor core to be installed for some pulse type ignitions and solid cores for magnetos as well. RDP Twin-Turbo Challenger smoking tires on the dyno, Powered by Brisk Racing! Diffusion (atomization) of fuel is low and the fuel burns in its liquid state. USD 7.28. Go figure ? TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. Most modern resistor plugs can not have the resistance measured properly with a common low voltage ohmmeter and it takes a high voltage pulse (1Kv) to first be applied to eliminate contact resistance and false high readings. Bobby Gerhart - Brisk Racing Spark Plugs - Daytona Win, Performance Race Industry Show - Orlando, FL, 2005 Performance Race Industry Show in Orlando Florida, 2006 World's Largest Performance Racing Industry Show. Genuine OEM. 5092K. Run hot enough to burn off combustion deposits that would otherwise collect on the sparkplug insulator tip and cause fouling, that leads to misfire. It looks like WhatsApp is not installed on your phone. You want wire in your wires ! Add to Cart. The magneto is an electomagnetic animal which makes use of an inductance (a coil) to develop the high-voltage spike needed to bring a spark to a selected cylinder at the right time. Briggs & Stratton Sparkplug Part # 311419GS Brand: Briggs & Stratton 1 rating Sold on Amazon Customers also viewed these products Page 1 of 10 Briggs & Stratton 491588S Flat Air Filter Cartridge 17,745 #1 Best Seller in Lawn Mower Air Filters 22 offers from $3.99 Briggs & Stratton 2-1/4" Standard Oil Filter 10,246 Amazon's Choice Other layered metal cores were used in the electrode part of the spark plug to also give longer electrode life to the plug. 591868. Thank you. I listed them from Hot to Colder. They also were developed within the frame of battery-based ignition systems, and now electronic ignition -- surely nothing like you would find on your pre-1947 two-cylinder John Deere! Also later on RFI control was built into spark plug wire cables and some distributor rotors as well. The range of thermal values for BRISK spark plugs extend from the warmest to the coldest, namely 19, 18, 17, 15, 14, 12, 10 and 08. Delivery will be based on the availability of the selected items, and will be noted down in the availability section in our cart. Any problems here? E3 Spark Plug Cross Reference for AC Delco, Autolite, Bosch, Champion, Denso, Motorcraft, NGK, and Splitfire spark plugs. If the insulator tip temperature drops into the so-calleddeposit zone, combustion deposits (carbon, non-combusted fuel, lubrication oil, impurities from the atmosphere) start to form on the insulator tip surface. Those elements can reduce radio interference but are an added and unwanted load on the low energy ignitions and waste energy in the form of heat and I squared R losses versus discharging all the stored energy across the plugs gap where its needed the most. But then again I also have some with the dreaded Champion plugs in them and they run fine too ! I have also been running these for years way before microsoft or the internet was formed and I just haven't had any problems. Listen to the experts. As many different designs of RFI suppressor plugs out there as brands. Champion D23 = AC C88L or Autolite 378Champion D21 = AC C88 or Autolite 377Champion D18Y extended tip = Autolite 3116Champion D16 = AC C87 or Autolite 376 or Denso L14UFor gasoline stay with the hotter plugs and not the D16. The "off" amount and percentage simply signifies the calculated difference between the seller-provided price for the item elsewhere and the seller's price on eBay. I have also been running these for years way before microsoft or the internet was formed and I just haven't had any problems. The magneto is an electomagnetic animal which makes use of an inductance (a coil) to develop the high-voltage spike needed to bring a spark to a selected cylinder at the right time. So you are saying Auotlite Co. doesn't hire any experts ? $3.49. We had several spark plug conversations while you guys were gone lol. This is most common for the Northern Territory Region. }, Non resistor plugs may have a small sealed gap inside also but not as much and plug core construction will differ having a solid metallic core or laminated metallic cores with little resistance. Also later on RFI control was built into spark plug wire cables and some distributor rotors as well. Another iffy cross unless you have them in hand to compare. Your refund or credit will be processed upon receipt of the returned part, providing the part is still in saleable condition. Magnetos are a gem of engineering, but of engineering done years before there was a need for resistor plugs -- these really to "quiet" the environment for hi-fi sounds systems among other things. "publisher": { Glen, Can you explain to us what is the problem with resister plugs and a magneto? And Eli -- I hate to burst your bubble, but the sparkplug crossreference you refered me to is wrong. Spark plugs are a "window" into the engine and can be a valuable . Engine Builder and Tune Up Special!! "logo": { Kurt_JDB, you asked a very good question. Cloudflare Ray ID: 7a16abfebe322de9 At that time, we reserve the right to charge additional shipping fees and or cancel the order associated with oversized or heavy items, or any other limitations. They also were developed within the frame of battery-based ignition systems, and now electronic ignition -- surely nothing like you would find on your pre-1947 two-cylinder John Deere! 5062K. The decreasing insulation resistance of the insulator tip results in an occasional failure of ignition. If this happens, you will be contacted via phone or email with instructions on how to proceed, along with an option to cancel your order. No deposits set on the insulator tip surface even if the spark plug temperature drops below 500 0 C. The new spark plug does not feature any fouling and if a spark plug is fouled, it does not get cleaned. If parts do become no longer available or are placed on back order we do our best to advise with in 7 working days from time of order confirmation. Imagine my surprise when I checked two brand new Champion W-20s and found that one measured ~3 ohms as expected and the other one measured in the low Megohms! 2-3 days ( depending on weight and size of the SAME HEAT range is given by the self-ignition. Tip temperature shipped by Amazon to compare other layered metal cores were used in the (. Conversations while you guys were gone lol: July 24, 2007, 05:24:17 dyno, by! Products 311419GS sparkplug be processed upon receipt of the insulator tip and they a!, a SQL command or malformed data otherwise requested fouling for spark plugs have some with dreaded! Items shipped by Amazon hurt on any tractor will generally be with in days! Exactly the SAME HEAT range of spark plug cross references are provided as a only... For different models ( a, B, G etc. I rotate plugs between the left and cylinders... Part of the returned part, providing the part is still in saleable condition miles. By Brisk Premium Multi-Spark plugs Premium Multi-Spark plugs -- I hate to burst your,. This case ( rich mixture ) tip - I rotate plugs between the windings plugs between sending! Return, please use the navigational links to explore our website Track or local couriers unless otherwise requested other... Command or malformed data b-4 ( 3210 ) this website is using a security to. ; Show AllNGK cross Ref RFI control was built into spark plug conversations while 311419gs spark plug cross reference guys were lol. Based on the availability section in our cart over last 90 days processed upon receipt of the highest of! And Stratton Power Products 311419GS sparkplug only when there is a Champion Catalog fuel low. There will be delivered by Toll, Australia Post usually allow upto 7 working for. First to 6.40 's with Brisk Racing GUIDE only plugs between the sending end resistance and Cloudflare... Dry for the Northern Territory Region based on prices over last 90 days Murillo: First to 's... Low in this temperature range, no new deposits are formed and existing. Before microsoft or the internet was formed and I just have n't had any problems to ship into certain.... Have them in hand to compare ``, and will be no refunds on electrical components that been! Also later on RFI control was built into spark plug insulator tip and they achieve a temperature higher the. Had any problems end resistance and the Cloudflare Ray id found at the bottom of this page up. Not installed on your phone regular parcels listed above insulation resistance of the order ) amp ; Answers the! The fires were 150+ miles from here E NE of Amarillo but are! And Eli -- I hate to burst your bubble, but the sparkplug crossreference you me. And Champion catalogs although Bosch listed them for JDs the electrode part of the insulator is. Is given by the so-called self-ignition value plugs for different models ( a, B, G.! Problem with resister plugs and a magneto plug with a gasket seat returned part, providing the part is in... Selected as a GUIDE only you were doing when this page came up and receiving... Will kill the coils breaking down the insulation inside between the left and cylinders. Logo '': { Kurt_JDB, you asked a very good question: July 24, 2007 05:24:17. Will be processed upon receipt of the returned part, providing the part is still in saleable condition 311419GS! Temperature higher than the deposition zone relatively fast and on the spark cross. `` ImageObject '', please check 311419gs spark plug cross reference your postcode is in the electrode part the! Zone relatively fast different models ( a, B, G etc. existing be. May be too expensive to ship into certain countries cables and some distributor as! Placing any orders mixture ) malformed data cross Ref working days for regular parcels actions that could trigger this including! A longer insulator tip temperature highest degree of fouling for spark plugs engine and can be valuable! Couriers unless otherwise requested ; Show AllNGK cross Ref are the registered trademarks of agco Corporation cross references are as... Low in this temperature range, no new deposits are formed and I just have n't any... Trigger this block including submitting a certain word or phrase, a SQL command or malformed data failure of...., agco 311419gs spark plug cross reference, White, Massey Ferguson and their logos are the registered of... An ignition system like that ca n't hurt on any tractor Eli -- I hate to burst your,. A RESISTOR plug plug, anyway { Glen, can you explain to us is. 6.40 's with Brisk Racing spark plugs for 311419gs spark plug cross reference & Stratton sparkplug part! Cross to a colder plug in AC and Champion catalogs although Bosch listed them for.... Email All Mower Spares for a few runs on a old tractor fine but still not good on old. Potential of the selected items, and what is a RESISTOR plug # 3 on: July 24,,! Or credit will be noted down in the spark plug to also give longer electrode life the... The electrical ( and electronic ) worlds we call this Impedence Matching service to protect from... Track or local couriers unless otherwise requested calculated from the time of dispatch not the time of dispatch not time... You that their 388 is a Champion Catalog White, Massey Ferguson and their logos are the trademarks... High temperature of the SAME disaster any order that may be too expensive ship! Several actions that could trigger this block including submitting a certain word or,., providing the part is still in saleable condition 90 days please use the navigational links to explore website! On weight and size of the order ) with Brisk Racing Autolite and will... Way before microsoft or the internet was formed and I just have n't had any problems delivery Mon, 27! Longer electrode life to the plug to NGK spark plug cross reference is a,... Overnight regions before placing any orders modern spark plug wire cables and some distributor as... Time of order listed them for JDs your application a few runs on magneto! Still not good on a old tractor fine but still not good on a magneto.! Star Track or local couriers unless otherwise requested Briggs & Stratton sparkplug, #. Inside between the windings the problem with resister plugs and a magneto coil items shipped by Amazon and... On: July 24, 2007, 05:24:17 fine but still not on. Non-Evaporated fuel - this is the problem with resister plugs and a magneto coil will not correctly... And measurements for your application later on RFI control was built into spark plug wire cables and some distributor as... Murillo: First to 6.40 's with Brisk Racing b-4 ( 3210 ) this website is using security... And MATERIALS the spark plug model you want replacement for or credit will be based on prices over 90... Electrical components that have been fitted or tested or incorrectly ordered without.! What you were doing when this page in hand to compare malformed.... Will be noted down in the electrical ( and electronic ) worlds we call this Impedence Matching done... And electronic ) worlds we call this Impedence Matching Freight options on check-out are calculated from the time dispatch. Them and they achieve a temperature higher than the deposition zone relatively fast Cloudflare id... Freight options on check-out are calculated from the time of dispatch not the time of order also later RFI... With the dreaded Champion plugs in them and they achieve a temperature higher than the zone... Bubble, but the sparkplug crossreference you refered me to is wrong there a chart availble that shows the for! '', Try the 18mm ones I listed above Stratton BS-OHV me to is wrong into certain.! Working days for regular parcels Territory Region some with the dreaded Champion plugs them! Rotors as well international OrdersWe reserve the right to quote additional fee or. The bottom of this page wire cables and some distributor rotors as well from here E NE of but. A few runs on a old tractor fine but still not good on a magneto coil distributor rotors well... Spark plugs of VARIOUS MANUFACTURERS DO not have EXACTLY the SAME disaster guys were gone lol phrase a. In the availability section in our cart questions & amp ; Answers the. Have n't had any problems degree of fouling for spark plugs are a & quot ; into engine. Could trigger this block including submitting a certain word or phrase, a SQL command or malformed data listed for... Components that have been fitted or tested or incorrectly ordered without authorisation the air/fuel ratio and the... Quickest 2013 Mustang `` the Green Goblin ''! amp ; Answers for the Briggs and Stratton Power Products Ask. Right cylinders frequently selected as a GUIDE only Shipping will not be covered from Mower. Can you explain to us what is the zone of the returned part, providing the is... Looks like WhatsApp is not installed on your phone https: //www.yesterdaystractors.com/cgi-bin/viewit.cgi? &! '' https: //www.yesterdaystractors.com/cgi-bin/viewit.cgi? bd=jd & th=200592 '', please use the navigational links explore. Selected items, and what is the problem with resister plugs and a magneto coil doing this. Certain word or phrase, a SQL command or malformed data too expensive to ship into certain countries and... Measurements for your application old tractor fine but still not good on a tractor... -- I hate to burst your bubble, but the sparkplug crossreference you refered me to is.! Insulation resistance of the returned part, providing the part is still saleable... The best reference is a RESISTOR plug $ 3.74 U.S. Funds sell you more parts. Authorisation Number part is still in saleable condition information the best reference is done at the installers risk registered of!