FSH 210 Sport
Jetboaters Admiral
- Messages
- 6,970
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- 8,345
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- 482
- Location
- Tranquility Base
- Boat Make
- Yamaha
- Year
- 2020
- Boat Model
- FSH Sport
- Boat Length
- 21
thought y’all might find this interesting…
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Yamaha does not put anyting on them from the factory but my dealer does and recommends it. I went to replace my plugs at 50 hours for the fist time when boat was 18 months old with factory plugs still installed. One plug broke off on Starboard engine. Dealer said Warranty would not cover since I was outside my first 12 months and YES would not cover since it does not cover maintenance items. I ended up paying $1200 to have the head removed from the dealer to remove. They said it was galvanic corrosion that caused so NGK's coating is a load of crap and I woudl not trust it. I will continue to use anti seize on any engine with aluminum heads.Actually NGK recommends not putting anything on the threads and the spark plug needs torqued correctly, not just snugging it. Does Yamaha put anything on the threads from the factory?
Straight from the NGK website.
NGK spark plugs feature trivalent plating. This silver or chrome-colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. The coating also acts as a release agent during spark plug removal. NGK spark plugs are installed at the factory dry, without lubrication or anti-seize.
Anti-seize can act as a lubricant, altering torque values up to 20 percent, increasing the risk of spark plug thread breakage and/or metal shell stretch. Thread breakage can sometimes involve removing the cylinder head for repair. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental.
Is this a solution to a problem that does not exist ? Copper anti-seize works just fine and is readily available everywhere vs. some super expensive tube of exotic German goo.
That’s called an innate taxis response ….I missed this thread when it was originally posted but, like @Ronnie, I had to click on it due to the title alone……….like a moth to the flame……
In a marine environment with salt water, I think that plating probably doesn't do much l, especially if you leave your boat in a slip during the boating season. If you trailer your boat exclusively, that's probably a totally accurate statement.I have never used thread lube on spark plugs or lug nuts,
From the manual.
5 Things You Should Know About Spark Plugs - NGK Spark Plugs
The five things you should know about spark plugs include information on anti-seize, corona stain, gapping fine wire, torque and copper spark plugs.ngksparkplugs.com
"NGK spark plugs feature trivalent plating. This silver or chrome-colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. The coating also acts as a release agent during spark plug removal. NGK spark plugs are installed at the factory dry, without lubrication or anti-seize."
Anti-seize can act as a lubricant, altering torque values up to 20 percent, increasing the risk of spark plug thread breakage and/or metal shell stretch. Thread breakage can sometimes involve removing the cylinder head for repair. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental."
For those suggesting dry is OK (Ngk included) rust might be rare in dry environments, but where saltwater sprays, i think the benefits greatly outweigh any added risk.