So scanning a ill running engine is a waist of time and Mr Good-wrench suspects head gaskets after you have done a compression test that looks ok, Im not sure if Id let Kankles touch it

F2,

That's why I asked. I'm not too keen on ANYONE digging into an engine that doesn't need dug into. I'm not one to go hunting for zebras.

I'm still thinking this is a relatively simple fix that has so far eluded diagnosis. And I'm going to keep exploring possibilities that rule out hypotheses until I run out of them.

Riddle me this..... Which "goes" first? Compression numbers or leakdown?

Thanks. Brad.
(937)545-8991

Did we use the spark tester yet ? No ? Why are we still guessing/wondering about things ?

F2 - i luv you man :wink

btw: in the last two hrs i just got a seadoo boat with merc 240efi only tunning with 3 cyl’s, too all 6. Getting the fuel psi from over 50 to proper 35 took a bit longer though. 2 weeks+ for a freaking fuel module gasket. Uggghhh

Just putting a timeline out there.

SB,

Used the spark tester last night, but only at an idle. All eight were showing spark at idle. Not really sure how I’d use it under load. Don’t know if I want to run down the lake with the sundeck up.

Thanks. Brad.
(937)545-8991

Phone on record or helmet cam.

SB,

Noted.

Thanks. Brad.
(937)545-8991

Guys,

Plugs out. Same as last findings. #4 and #7 showing no signs of combustion. Squeaky clean. MAYBE a hint of a smell of gas on these two. Kind of hard to be sure.

I’ve also noticed a consistent appearance of oil around the threads of #7 each time I’ve taken it out. Not a lot. And not inside the cylinder. Outside. Might have a leak. 🤨













Since #5 was of interest previously, I took some closeups of it, as well. I’m not sure what was going on with it last time, but it looks pretty much identical to the others this time around, excepting #4 and #7, of course.

Thoughts?

Next, I plan on swapping the injectors. Ill swap them the same I did the coil packs; 4-6 and 7-5. I’ll take pictures of them as I do so. I’ll also figure out a way of getting some video of the spark tester in use, under load, on the water.

Repeat…. Anybody have any actual dealings with Kunkel’s?

My hips and shoulders are going to mount a protest before long….. 🙄

Thanks. Brad.
(937)545-8991

Water can clean’m too. I see this slot on various engines, usually ones with some cam and marginal exhaust for them.

Got it. Must have missed that earlier.

If you have a home air compress this should work

Harbor Freight Tools – Quality Tools at Discount Prices Since 1977