Custom/Hybrid Piston wash on coated pistons

[Billybo455]

i'm running pistons with a coated top. my plugs are starting to getting close to where i think they should be, but there is absolutely no carbon on the pistons. there is about a hour of run time on them now and i know there should be some kind of carbon after 5 minutes. any input?

thanks

this is on my watercraft/snowmobile hybrid engine. don't think it matters to know, but vf3, 46sbns, powerfactor pipe, and TL.

 

[Aircraftsalz]

Blake I just pulled my 1000 apart, about 150 gallons on it, pistons looked new, I mean new...

 

[Billybo455]

hmm, i'll be paying way more attention to the plugs then. my oem polaris pistons had a perfect wash pattern on them. btw. if i can get the power to drop about another 1k rpms. todays test ride was beastly. this thing has some serious potential i think.

 

[Waternut]

I think piston wash has a lot to do with the oil you use as well. I run Marine Penzoil synthetic and piston wash is almost non existent. I tried playing with the tuning because I thought maybe I was too rich. 1/16 of turn in either direction made the ski run crappy so I changed it back to where I had it and said "to hell with piston wash".

 

[Billybo455]

i can agree with that. but i run the same oil as i did before. amsoil dominator. my orginal pistons had perfect wash pattern.

 

[Billybo455]

no other input?

 

[Billybo455]

bump!

 

[WaveDemon]

if you have no wash you're too rich.

 

[Billybo455]

even on pistons with a coated dome?

 

[WaveDemon]

even on pistons with a coated dome?

I guess I didn't read closely enough, I'm not sure. sorry.

 

[Matt_E]

Note that any water ingestion, even if slight, can steam clean a piston very quickly.

 

[Billybo455]

yeah, i've just been doing test runs. so its either strapped to the trailer, or i don't fall off haha