Fouling Plugs?

stupidgoodness3

stupidgoodness3

X-H2Dizzle
ok heres what going on.. I have a 95 Sj it has a b pipe, 46mm carb, stock bore, milled head 170 compression, skat impeller pitch unknown..

About two weeks ago it fouled my back plug ( cylinder 2), ok no problem I just bought it a couple months ago and who knows how long the plugs were in. Now today I took it out and the back plug once again as fouled.. What could be causing this to happen?

I have been mixing it at 50:1 with yamalube...


-jay
 
crammit442

crammit442

makin' legs
Location
here
stupidgoodness3 said:
ok heres what going on.. I have a 95 Sj it has a b pipe, 46mm carb, stock bore, milled head 170 compression, skat impeller pitch unknown..

About two weeks ago it fouled my back plug ( cylinder 2), ok no problem I just bought it a couple months ago and who knows how long the plugs were in. Now today I took it out and the back plug once again as fouled.. What could be causing this to happen?

I have been mixing it at 50:1 with yamalube...


-jay
Click to expand...

If it runs well with new plugs, change your plugs more frequently. Many people run the same plugs far too long. They're cheap.:biggthumpup: Change them often. Don't waste your money on expensive iridium or other fancy plugs. Just use standard NGK. I change every 3-5 tanks of fuel.

Charles
 
stupidgoodness3

stupidgoodness3

X-H2Dizzle
crammit442 said:
If it runs well with new plugs, change your plugs more frequently. Many people run the same plugs far too long. They're cheap.:biggthumpup: Change them often. Don't waste your money on expensive iridium or other fancy plugs. Just use standard NGK. I change every 3-5 tanks of fuel.

Charles
Click to expand...

yah but after only 2 weeks on brand new plugs? and I only go out once a week..
 
jetskiking

jetskiking

Im done sanding!!!
Location
Dallas Georgia
crammit442 said:
If it runs well with new plugs, change your plugs more frequently. Many people run the same plugs far too long. They're cheap.:biggthumpup: Change them often. Don't waste your money on expensive iridium or other fancy plugs. Just use standard NGK. I change every 3-5 tanks of fuel.

Charles
Click to expand...
Dont you pull that motor down every 3-5 tanks also? J/K:biggthumpup: . Charles has probably the best mantained boat out there and it shows by how it runs. I do find it odd that you are only fouling one cylinder. The coil fires both cylinders at the same time so that is somewhat ruled out. Its a single carb so that somewhat rules out jetting. Is there a big difference in how the front and back plugs look when you pull them?
 
crammit442

crammit442

makin' legs
Location
here
jetskiking said:
Dont you pull that motor down every 3-5 tanks also? J/K:biggthumpup: . Charles has probably the best mantained boat out there and it shows by how it runs. I do find it odd that you are only fouling one cylinder. The coil fires both cylinders at the same time so that is somewhat ruled out. Its a single carb so that somewhat rules out jetting. Is there a big difference in how the front and back plugs look when you pull them?
Click to expand...

:booty: :booty: :booty: :booty: :booty: :biggthumpup:
 
stupidgoodness3

stupidgoodness3

X-H2Dizzle
they look pretty much the same with a nice color on each one but for some reason only the back one is fouling.. probably 1-2 tanks of 50:1 yamalube went into these brand new plug..
 
stupidgoodness3

stupidgoodness3

X-H2Dizzle
yah, and now the back plug boot does not seem to be snaping down on it like on the front. So im hoping this is somehow the problem..
 
You must log in or register to reply here.
Top Bottom