Super Jet sparkplugs and jetting

[pballsteve5]

How often should the plugs in a sj be fouling? because iv been fouling two to three sets everytime i go out. And i have a pretty good feeling that might be caused by water getting into flame arrestors then cylinder which i think could foul a plug? or do i definately need to rejet or at least make some adjustments? thx guys

 

[FlightPlanDan]

If things are working right, I've gotten thru an entire season on one set of plugs. I don't think jetting is the answer.

What do you see on the plugs when you take them out? Milk? mayonase? black oil? White?

 

[Matt_E]

I change my plugs every 30 or so gallons. Tiny amounts of lead can build up. It's what, 5 bucks?
That said, they don't foul.

 

[pballsteve5]

usually when i take them out its like a black oil with watery looking droplets...the black oil means its running too rich and white means its running too lean right? you want like a tannish color dont you?

 

[Matt_E]

You shouldn't have water on there. You may have a leaking head gasket or o-rings, depending on your head.

 

[pballsteve5]

i have an ada racing head. i dont think the head gasket is leaking but what is a good way to check just to be sure?

 

[Matt_E]

I'm no expert, but water on the plugs indicates a leak around the domes. If it were my motor, I would pull the head off and take a good look at the o-rings and dome mating surfaces.

 

[pballsteve5]

ok. thx for the advice. ill do that asap.

 

[Mark44]

I change mine every year just in case they need it, if the ski is tuned properly thats all they need to be changed. IMO

Mark44

 

[Saltwater N Premix]

I'm no expert, but water on the plugs indicates a leak around the domes. If it were my motor, I would pull the head off and take a good look at the o-rings and dome mating surfaces.

X2 My thoughts exactly

 

[Saltwater N Premix]

Speaking of which I fouled a plug on saturday I let it load up as I was circling around my friend who was on my ultra with the nose in the air and the exhaust loaded up underwater for a good 30 seconds or so and I fell over like a loser while going 1mph and flooded it. I think mine is jetted too rich tho bc they were definitely oil fouled..