How do my spark plugs look?

[Austin69]

My 01 challenger twin 717 w new carbs and working on getting them dialed in. This was after a 30-45 min cruise on the lake. Let me know which motor looks like its too rich or lean with fuel etc! First pic is left engine,

 

[mikidymac]

Honestly they both look pretty lean but the first ones look dangerously lean.

 

[Austin69]

Honestly they both look pretty lean but the first ones look dangerously lean.

Interesting! So needs more fuel to the mix? Odd because i thought they were supposed to be brownish like the second pics. And same with matte/dark greyish but its been confusing as i see people say opposite things like its too rich or thats normal. But ill take an answer here over anywhere else!

 

[mikidymac]

Never gray or white. Your first ones do not look good. Gray is typically aluminum coming off pistons and causing damage.

Your second brown ones should be fine and get darker with only 30 minutes on them.

This is about as perfect as a seadoo sparkplug should look for a happy engine...

 

[Austin69]

Never gray or white. Your first ones do not look good. Gray is typically aluminum coming off pistons and causing damage.

Your second brown ones should be fine and get darker with only 30 minutes on them.

This is about as perfect as a seadoo sparkplug should look for a happy engine...
View attachment 68361

Oh i should have mentioned the first ones are from a reburbished SBT engine about 3 hours into its 10 hour break in if that might have anything to do with it?

 

[mikidymac]

Oh i should have mentioned the first ones are from a reburbished SBT engine about 3 hours into its 10 hour break in if that might have anything to do with it?

I would do a compression test on that engine.....

 

[Austin69]

I would do a compression test on that engine.....

I did both cylinders are great! I have the high speed adjuster set to completley closed as the specs say 1-1/4 turns low speed& 0 turns high speed adjuster. Should i open it up a quarter? Or just richen the low speed?

 

[mikidymac]

A stock seadoo will run perfectly on stock carb settings. So if you are that lean they something is wrong. Either the carbs are dirty and/or not functioning correctly or you have an air leak somewhere.