Add an answer. Superior corrosion resistance. In fact NGK produces and stocks over 1,000 different types of spark plug and every product matches even the most demanding . Size. Only 1 left in stock - order soon. Ms. Carla . The copper core center electrode allows for accurate control of heat range for longer life. NGK's performance and heat dissipation capacity cannot beat that of Champions. If this is for a marine application (IE:outboard motor) 0.030 is the gap required for most, but you should . Champion Spark Plugs provide dependable performance. OE type replacement plug. The cross references are for general reference only, please check for correct specifications and measurements for your application. Champion spark plugs!! Built to ISO and SAE standards for proven performance. 50 1971 - 1975 L77JC4 or QL77JC4 .030 40, 48, 50 (2-Cylinder) 1980 - 1988 L78V Surface Gap or QL77JC4 .030 . Price and other details may vary based on product size and color. The cross references are for general reference only, please check for correct specifications and measurements for your application. The laser 40500 Champion cross reference is for spark plugs. So is the L77JC4 really the same as QL77JC4? seahorse. Ships from and sold by Outdoor Power Equipment. . Superior corrosion resistance. Specifications for Champion QL77JC4. 1-16 of 263 results for "champion l77jc4 spark plug" RESULTS. Copper Plus - Dependable Performance and Durability. On the Champion website it says the L77JC4 is a "Q" series spark plug. Copper core center electrode allows for accurate control of heat range for longer life. 68. Superior corrosion resistance. There are 37 replacement spark plugs for Champion QL77JC4 . Conductivity. Copper Plus - Dependable Performance and Durability. 6,992. #2. . Tread Diameter:0.551. Resists fouling. Copper core center electrode allows for accurate control of heat range for longer life. Wiki User. Copper core center electrode allows for accurate control of heat range for longer life. 2. Re: Champion QL77JC4 vs. QL78YC. Threaddiameter: 14mm. S. Champion marine spark plugs are quality OEM replacements. This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. Or does it have to have the "Q" on the plug it self. This Champion Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. What I have seen is on the early motors the reach had the plug in an area where the combustion was not as good with the 78YC's, with how the intake flows and the combustion chamber design.But now when you have one that has different combustion and things have been changed like yours you may use them, what I would do . It depends upon the engine. 2017-09-25 18:49:36. Jan 5, 2003. Be notified when an answer is posted. These marine spark plugs are designed to resist overheating under heavy engine loads. All spark plugs are Champion brand unless otherwise specified. What can I do for you? The Champion QL77JC4 Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. Champion QL77JC4 (828M) Pack of 8 Spark Plugs. Specifications for Champion L77JC4. posted 09-15-2011 07:11 AM ET (US) The letter Z in the NGK sparkplug number indicates a suppressor style - not resistor style - sparkplug. Champion L77JC4 Pack of 4 Spark Plugs. This is an OEM type replacement plug that resists fouling. Does anyone have any idea what the difference between a QL78YC and QL77JC4 champion spark plug is? Need cross reference for Champion Spark . FREE Shipping by Amazon. When more than one plug number appears, the first plug listed is the prefered spark plug. 4.8 out of 5 stars 267. Want this question answered? Threaddiameter: 14mm. OE type replacement plug. Engines with higher compression require a narrower gap. NGK Spark Plugs. n/a ql77jc4 n/a ql78c n/a ql78v n/a ql82c n/a ql87yc n/a qn19v n/a . Copper plus spark plug. Whether it has the same specs that Johnson and Evinrude require in the Champion Q style suppressor plugs is unkown. China Champion Spark Plug Ql77jc4 Manufacturers, Supply Champion Spark Plug Ql77jc4 with High Quality, Wholesale Champion Spark Plug Ql77jc4 with Low Price, High Quality. Facebook; Contact Now; Linkedin; Printerest; YouTube; Twitter . Gap Size: 0.40 inch. There are many cross reference data bases to show which spark plugs can be interchangeable. Sacre Bleu! Champion QL77JC4 (828M) Pack of 8 Spark Plugs $32.64. This item: Champion Marine 821M L77JC4, QL77JC4, B9HS10 8 pack $28.08. sandbass,The QL78YC plug has a taller electrode and fires a bit deeper in cylinder.Don't know if your 225 calls for it as an optional plug or whether you would experience better operation than with the QL77JC4.My 95 70 rude calls for the YC plug and lists the JC4 as an optional. NGK spark plugs have better and higher conductivity. This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. What is the difference between a champion l77jc4 and a championl77j4? Patented SAC-9 semiconductor resistor for maximum EMI & RFI suppression. Champion Spark Plug is better and has higher conductivity than NGK. $34.68 $ 34. 3. Is one hotter than another or is one better or what? Resists fouling. +8613536163461. (Besides the number). Type. In Stock. Resists fouling. ngk champion ab8 d6 b2lm j19lm b4lm j17lm b5es n5c b6hs l86c b6l h10c b6s j8c b7hs l82c b7hs10 l82c b8hs l78c b8hs10 l78c b8s j4c b9hs l77jc4 b9hs10 l77jc4 bcpr5e11 rc12yc bkr5e rc12yc bkr5e11 rc12yc bkr5es11 rc12yc bkr5eya rc12yc bkr6e rc12yc bkr6e11 rc9yc4 bkr6ek rc12yc . For the differences between a regular plug, a resistor plug, and an inductive suppressor plug ( "Q" style Champion ) these links may help: This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. BK What I should say is its best to use these instead of these others I guess. My motor calls for the QL78YC but I noticed it had QL77JC4 plugs in it. Get it as soon as Sat, Jul 23. There are 89 replacement spark plugs for Champion L77JC4 . NGK has been developing spark plug technology since the 1930s and manufacture plugs for every type of automotive engine, as well as for motorcycles, marine, horticultural, plant and many other applications.