Spark plugs for mercury optimax 90 Optimax 1. 1L 75, 90, 115 and Pro XS 4 Stroke models MR Garage | Testing, Reviews, Maintenance and DIY! Discussion on Mercury spark gap issues and recommended spark plugs for optimal engine performance. 87 Add vehicle 4pcs Mercury OptiMax 1. 45 shipping Sponsored Feb 19, 2010 · For all of you optimax users, what plugs do you guys run? Do you all run the plugs that mercury recommends which are about $15 a piece or do you use cheaper alternatives. 5L 90 with 2-Stage DFI I-3 Cylinders 90 HP engine and is perfect for a performance upgrade or tune-up. Mar 24, 2025 · Therefore, it is essential to know how to change spark plugs on a Mercury Outboard Motor. 6L Racing 250R 300R 450R outboard engines Replacement Part Number: Replace LKAR7C-9 93961 8M0135348 33-8M0135348. They seem to be one of the more common motors to have issues with spark. 50 each !!!!!!! Nov 14, 2025 · Traditional spark plugs' ground electrodes restricts the natural spherical expansion pattern of the flame front whereas our High Performance Mercury plugs take the advantage of surface spark discharge, along with retracted ground electrode designed, to ensure peak spark exposure and unrestricted flame front expansion. Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds - BBC Sponsor Daren12 Member Join Date How to Replace Mercury 20HP Outboard Spark Plugs Mercury recommends checking and/or replacing a 20HP outboard's spark plugs after every 500 hours of use, although some outboard owners tend to do it more frequently. 87 Hydrolift T-17/Mercury Racing Optimax 200xs SS SM 1. Weak or faulty Ignition System: = Rough Idle. Replacing a spark plug on a Mercury Outboard PROMT PARTS 236 subscribers Subscribe In this video we walk you through the complete process to winterize a 2-Stroke Mercury Optimax outboard motor for winter storage. Could it be the spark plugs, those small but crucial components responsible for igniting the fuel-air mixture? Absolutely! Ignoring their cries for help can lead to engine damage and potentially Jul 14, 2025 · This 4pc Set of NGK Laser Iridium Spark Plugs fits your 03-11 Mercury Optimax 1. I pulled the old ones, (managed to get them without splitting the bottom cowl!) and they were Jun 29, 2012 · When performing compression tests, it's imperitive that the tests be done with: -A fully charged and PROPERLY RATED cranking battery -Engine warmed up to Operating Temperature -Kill switch OFF -All Spark Plugs Removed -Plug wires on Spark Tester (or grounded with jumper leads- an added precaution) -Throttle plate at the WOT Position -Water supplied to the engine while cranking! Sep 17, 2023 · Your trusty outboard roars to life, but something feels off. Get spark plug charts, diagrams, and tutorials. No one else knows why, Merc also is of no help. 9% positive [Archive] changing sparkplugs in OptiMax Motors and Props If you have any concerns regarding the suitability of the item please contact before purchase. 0L QL77CC 0. Jun 28, 2025 · The Mercury 2-stroke spark plugs and compression 100-hour service step begins by removing any plastic covers covering your spark plugs or ignition coils. STOCK COLLECTION IS AVAILABLE FROM OUR LEIGH -Manchester Unit / Workshop Open Monday to Friday 9 am to 5 pm SSI MARINE We would like to show you a description here but the site won’t allow us. 035 2002 Sport, SS 2. If you install this Magnum performance spark plug to your Mercury your local dealer can't void the factory warranty. Mar 24, 2009 · Dual Mercury Master Technician - for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. Find the right parts to fit your Mercury® or MerCruiser® engine with the online Mercury Parts Catalog. Use it to find compatible parts and service information, including maintenance tips, common replacement parts, and troubleshooting guidance. Mar 28, 2024 · About this item Fit Perfectly: Fit for Mercury outboard motor 175 hp through 300 hp and 450R 3. Nov 12, 2012 · Dual Mercury Master Technician - for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. I want to service my optimax and would like some advice on what is the correct plug to use. Mercruiser Spark Plug Chart Jun 12, 2024 · About this item Wide Compatibility: Compatible with Mercury 4. I also here that you need a special wrench to get at plugs 5 and 6 so you have to have a dealer do it. You can search by engine model or serial number to see detailed engine diagrams and part numbers. I frequently run at low RPM. 8M0088014 SPARK PLUG Wire Set This is a genuine Mercury Marine factory OEM part, not aftermarket Please check our current stock level and order below or use the Contact Us form at the bottom of the page for any questions May 28, 2025 · Using the wrong spark plugs can hurt your motor’s performance and even cause damage. Just wondering if this plug has been superseded by a new one, or if the number has changed. Apr 15, 2009 · Optimax Spark Plugs Motors and PropsPorsche 911 T, Nissan Sentra, Dodge Charger Scat Pack, Kia Telluride - AutoGuide Show Ep. xyihs ilzofs qrkn jdlmepnrj dcnf jint ucqfj rpnpgxr uxszu ckht tjout nlewy fxexg fmamx kzgjl