most frustrating V4 omc issue ive ever experienced

[racervboat]

[PanRonnie]

If you have the wire why not measure the voltage side of the coil ?

[JoshKeller]

update - its not the flywheel. Put it all back together, took it down to the river and tested it on the trailer. It ran strong for a few seconds, then dropped the cylinder again and then sputtered a bit at idle - removed the plug wire off top port cylinder and no change. Removed the spare head, and there was a drop of water in the head and it too was cleaned off after about 8 - 10 minutes of runing. Im thinking maybe the new gasket i got was bad. It ran strong until water circulated and breached the gasket, then as water entered the cylinder, it stopped firing and began cleaning itself out.

https://imgur.com/gallery/NS4Ui

[flabum1017]

Post # 9 maybe?

[JoshKeller]

Possible water leak in the exhaust spraying water into the exhaust port on that cylinder, That's a cross flow v-4, right?

Sorry, I missed this - how would I determine if this was the problem? It is a v4 cross flow.

I have determined with 100% certainty, i am getting spark at all rpms.

[flabum1017]

Just pull the exhaust chest off (both plates), Slots in the middle are the water cavities

[flabum1017]

Also, take a close look at the inner plate (49) for holes; the space between the inner and outer plates (51) is a water cavity also.

Attachment 383300

[JoshKeller]

will give it a shot after I replace the head gasket again. If that doesnt solve the problem, im looking at just throwing my spare block on and going with it. Upon closer inspection, I can see where water was leaking from the gasket, and one of the bolts was stripped, but being held in by corrosion - directly across from the plug hole on the problem cylinder. i drilled and tapped to 3/8", so i will give this a shot first.

[mn808gade]

post#9

[JoshKeller]

If it turns out to be #9, what is the best repair?

[flabum1017]

Make sure the surfaces are level and new gaskets.

[JoshKeller]

Alright pulled the exhaust covers off, but unable to tell if the gaskets were bad, as i had to pry it off. The top cylinder seems cleaner. There is DEFINITELY water entering that top cylinder from somewhere. Any other places it can come in? I ordered new exhaust gaskets.



https://imgur.com/gallery/qSMHo

[mn808gade]

got sum cleanin and tappin to do.little hint--press 1/4x20 nut over square end of tap and use a socket on end of tap..-th

[flabum1017]

How does the inner exhaust plate look? Any holes or cracks in the vicinity of the wet cylinder?

[JoshKeller]

How does the inner exhaust plate look? Any holes or cracks in the vicinity of the wet cylinder?

No, appears to be good. Water has to be coming from somewhere though