DO NOT grab or violently pull spark plug cables. Visit our site for coupons and promotions. 4.3L. Carbureted and EFI's like Indmar TBI, MCX, RTP, LQ9, LY6, LTR, LT1, … Shop for ACDelco Spark Plug Part #: R44LTS for your vehicle. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. I ended up installing a set of ACDelco MR43LTS plugs, gapped at .40. I would go with John's recommendation and if you need to step up or down a range, you can make any adjustments after running your engine awhile and 'reading' your plugs. ACDelco Specialty Marine Spark Plugs are everyday replacement plugs designed for reliability and efficient performance in jet boats, inboards, outboards, and personal watercraft. What’s more, this set comes as a pack of eight, allowing you to fully replace the spark plugs in your engine, or … Fits GM based Vortec engines from 1998 to current. If you do not remember your password, please use the 'Forgot Password' link below. NGK Racing NGK Standard Part No. I put the MR43T plugs in gapped at 0.035" and it seems to have a little miss at low RPM's. Pull the spark plug boot and cable away from the spark plug. Visit our site for coupons and promotions. Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise. Plug images are located on the opposite page. Please create a password for your account. SPARK PLUGS FOR ENGINES WITH SERIAL NUMBER 0M300000 AND ABOVE Production Years Engine (Sterndrive, Inboard, Ski) OEM Spark Plug Mercury Part Number Gap Before April 2006 3.0L AC MR43LTS 33-862029 1.14 mm (0.045 in.) MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. Malibu-Indmar LCR, Monsoon, Hammerhead and many other small block models. I attributed this to a bad fuel problem I was battling at the same time. 5.0L and 5.7L carbureted AC 41-932 33-884019 1.14 mm (0.045 in.) It is very hard to find the MR43LTS plugs. Spark Plug; ACDelco Specialty … Pull the spark plug boot and cable away from the spark plug. ACDelco MR43LTS Marine Spark Plug. ACDelco 41-110 Professional Iridium Spark Plug. Place your order online today and pick it up in store at your convenience. You simply need to keep making adjustments until the key fits snugly. The Sallee Chevrolet site lists the MR43LTS as the original plug and the FR5LS as a replacement plug. The ZZ4 uses L98 Aluminum heads. ACDELCO MR43LTS Spark Plug ALL THE PARTS YOUR CAR WILL EVER NEED Show Prices In US Dollars ($) Australian Dollars (AU$) Brazilian Real (R$) Canadian Dollars (CAD$) Swiss Francs (CHF) Euros (€) British Pounds (£) Japanese Yen (¥) Mexican Pesos (Mex$) Norwegian Krone (kr) New Zealand Dollars (NZ$) Spark plug charts are sorted by thread size, thread reach, hex size. ACDelco Spark Plugs are precisely engineered and manufactured to provide everyday reliability and efficient performance, helping your engine run cleaner and longer. Get product details, choose a store, and get directions. 3/4” Reach R5184-95 7485 291 IC 13/16” Hex R5184-10 7457 291 IC See cross reference chart for AC Delco MR43LTS and more than 80.000 other spark plugs. 34 replacement spark plugs for AC Delco MR43LTS. Spark Plug; ACDelco Professional Conventional Spark … They came already gapped and ready to plug in, I did check them to make sure everyone where at the right gap.. Its a good idea to use these on a marine engine as the plugs them self are made of stainless steal so that it will not rust since there is alot of water. that cause major problems before they break. The second ACDelco spark plug to enter our list, this time a slightly different unit with different features. Stock No. See cross reference chart for AC Delco MR42LTS and more than 80.000 other spark plugs. You are invited to join our public Boat Repair Forum to seek assistance from other members. Spark Plug Ac Mr43Lts, Mercury - Mercruiser 33-862029 available at Wholesale Marine. Stock No. The heads are not Vortec or fastburn. If necessary, use a spark plug boot removing tool. ACDelco MR43LTS Spark Plug, Usedon Indmar GM 5.7L Non-catalyst equipped exhasut engines. ACDelco Professional Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. DO NOT grab or violently pull spark plug cables. Combustion occurs through the transfer of electrons across the spark gap. Each one sits at the top of a cylinder head in your engine to combust fuel-air mixture and fire up your vehicle. Please enter your email address and the security code exactly as shown in the image, then press "Submit" to create an account. If they are IRON GM Vortec heads they use the A/C R44TS plug .045 gap if aluminum head it uses a A/C MR43LTS You can go to these links for other brand options using the cross reference. Image Racing Spark Plugs 14mm Spark Plugs (cont.) The book says the MR43T should be gapped at 0.035" but not specifically for the 5.7L. Shop for ACDelco Spark Plug Part #: MR43LTS for your vehicle. While spark plug gap does not have a direct effect on timing, excessive gap in a power adder application can easily cause engine misfire. For AC Delco spark plugs part number FR5LS or equivalent, the correct gap is .035 (GM Specifications). Get product details, choose a store, and get directions. Fix minor things (replace wear items for preventative maintenance.) The spark plug is possibly the most integral component of the spark-ignition combustion engine. Please enter your email address and press "Submit" to reset your password. By scott_duerring in forum Crusader Marine Engine Forum, By bgallan in forum Johnson Evinrude Outboard Archive, By saved in forum Yamaha Outboard Archive, By jstewart3 in forum Chrysler Inboard and Sterndrive Archive, By paul percival in forum Mercury Mariner Outboard Archive, Gas Inboard Engines, Inboard/Outboards, and Sterndrive Forum, Forum Rules, Information and Announcements, Other Diesels Mfgs and General Diesel Questions, Miscellaneous Marine Engine Related Topics, Tubing, Water Skiing & Wake Boarding Forum, Suggestions and Feedback regarding this board and the website, Suggestions / Feeback about the MarineEngine.com site, Test posting of messages, photos and formatting. No parts for vehicles in selected markets. Get deals on automotive parts, truck parts and more. NGK 2238 TR5 V-Power Spark Plug. I was a little leery of going 2 heat ranges down (R42LTS). The plugs I replaced where 3 month old R44LTS, so it is not an issue of needing a tuneup. 19 replacement spark plugs for AC Delco MR42LTS. My son has stayed with the MR43LTS plugs gapped at 0.045" and they have worked just fine for him. Brush or air blast dirt away from … We offer Mercury & Mercruiser products at low prices with superior service. Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise. It has helped (almost eliminated) my knock retard, due to running the colder plug. In addition, a higher secondary voltage has more energy to jump across an air gap, so increasing spark plug gap by 0.010 to 0.020 inch may provide a fatter spark that will more reliably ignite the air/fuel charge. The MR43T plugs are short reach plugs and the MR43LTS plugs and 41-932 or 41-993 are long reach plugs. It had a tapered seat R45TS plugs in it. Find ACDelco 19355201 ACDelco Conventional Resistor Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! If you use short reach plugs in an engine designed for long reach plugs, you will experience incomplete combustion and poor performance. A spark plug gap gauge is a disc with a sloping edge, or with round wires of precise diameters. NGK's V-Power Plugs Feature a Unique V-Cut in the Center Electrode that Directs the Spark to the Edge of the Electrode, Helping the Spark Develop More Rapidly, Increasing Ignitability and Reducing Quenching. Buy Spark Plug - Copper - AC MR43LTS online from NAPA Auto Parts Stores. Product Specs: GM Part #5614210; Indmar Part #491008; Non Automotive Spark Plug; Fit's most Multi-Port Injection and Throttle Body Engines in tournament ski and wakeboard boats. This plug has worked well for me. Brush or air blast dirt away from … It is used to measure the length of the gap between the ground and central electrodes. Electronic high-energy ignitions are more effective in the marine environment with about a .035" to .040" spark-plug gap "A wise man makes his own decisions, an ignorant man follows public opinion" Edited by - MAXUM27 on Aug 17 2007 09:48:03 The simplest gauges are a collection of keys of various thicknesses which match the desired gaps. They can maintain stable operating temperatures under varying loads. Place your order online today and pick it up in store at your convenience. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. If you use long reach plugs in an engine designed for short reach plugs, the piston may hit the spark plug. It sounds like I need to go to the boat store and get the MR43LTS plugs. This item ACDelco MR43LTS Specialty Marine Spark Plug (Pack of 1) Quicksilver 898264001 AC Delco MR43T Spark Plug Quicksilver 816336Q NGK BPR6EFS Standard Spark Plug, 1-Pack Fits Crusader, Indmar, Kodiak Marine, Marine Power, Mercury, OMC and Volvo Penta inboard engines. Image Part No. If you do not have an account but would like to check the status of an order, request a change, or report a problem with an order or shipment, please go to our, Include all vehicles manufactured before 2000, Please click 'Part Catalog' tab above to find your vehicle and verify application. GM Vortec Marine Spark Plugs. If necessary, use a spark plug boot removing tool. Hotter plugs are listed above the colder plugs.