Do you use sealant on the power head to adapter gasket? My manual says no but I don’t know if I trust not using itWell I think your good to go , snot perfect but that looks like a lot of used motors and I have seen way worse that was still running . If you cant feel the marks they cant be that bad . If the engine went ok last season and has reasonable compression Id let it pass . I think such marks are likely caused by a bit of carbon getting between piston and cyl and getting dragged up and down for a bit . I think if anything metalic( piston circlip of piece of broken ring or reed valve petal ) got in there damage would be worse
You could remove bits for further inspection but unless your planning on a rebuild if you find serious damage there is probly not much point , gotta admit tho, curiosity would see me wanting to pull the bypass covers as racerone says , relatively easily done .
Wipe the bores with a clean oily rag , chuck the heads on and do a comp test and if its OK try and forget what you saw and enjoy some boating. It aint that bad
This is the manual. I’m pretty sure it’s omc. The gasket is sierra.
Thank you for that insight. That helps me a lot! I appreciate it!
I had already purchased the entire gasket kit at that point. And I bought the one made by sierra from wholesale marine.
The omc gaskets and sierra gaskets literally look and feel like the same thing. That’s why I bought sierra. It was $50 cheaper for the kit
The gasket I have for the power head says made in USA. So that’s good enough for me. Could be Chinese or worse
Some peeps get hung up on "factory" parts and its bollocks coz most of the "factory" parts are not made in the factory but bought in .
). .Far out ,I havnt seen one of those types of gasket for a blimmin long time , I think it was on a 2 stroke power hammer, But I do remember skewering my finger on a bit of wire stickin out of it .
. , I have even used a couple of layers of a pillowcase and spray bomb paint .That’s all that’s available for this engine. Is a paper gasket. I’ve searched everywhere. I was a technical inspector on chinook helicopters in the military. I’m pretty good at researching. No such gasket exist other than paper material
I’ve seen gaskets for other engines that are a lot thicker and have some metal material. But for this engine they don’t exist unfortunately. I have to use what’s available. I installed it with gasket sealing compound and seems to be fine. I’ll know more when I fire her upI guess that depends on what you call thin . The thinnest gasket sheet I have is .7mm .
I was repairing a motorbike gearbox and the way to set end float on the main shaft was gasket thickness on the end cover/case joint . I wound up using a page of a school exercise book to get the last few thou. Cover was doweled on but did hold the bearings for the 3 shafts ( 74 850t Guzzi )......doesnt even leak
I hear what your sayin racerone , there is def the wrong type of gasket to use in some applications, but I bet we have all at sometime been involved in cutting a cereal packet up to make a gasket just to get things moving again .
There is one on ebay now ,$9.95 us
Darn....you just spoiled my day... I just installed a 43$ head gasket on a EV 6hp I just refurbished dealer was asking 73$ CDN plus 15% taxes (O.M.G. !)
