force 125 '84 question

[bcsnare]

I posted earlier that I found a considerable amount of water in the cylinder 2nd from bottom. I figured it was a head gasket...that it was. the ring on the gasket was broken and deflected out...that explains the water in the cylinder, the bogging, and the water coming out the exhaust. it appears as if i didnt damage the pistons or cylinder.

I noticed a a fair amount of ?carbon? buildup on the exhaust holes of the cyliner, so i pulled the exhaust plate to take a look. i was a little suprised to have the gasket spring the plate off of the head because it was so warped.

Am I correct that I should definitely replace this as well??

The top two cylinders had more build up than the lower two....even the aluminum plate had alot of build up on the upper half and much much less on the top half. it wasnt an outrageous amount, but enough to where I think i would want to remove it and make an adjustment. there was even a trace of oil draining down from the top two spark plug sockets..not much but a trace. Any suggestions as to what might have caused this or the head gasket failure?? It did over heat once idling out of the dock very recently around 900rpm. Idk, im just trying to provide some possibly relevant info. Is this a carb adjustment? I rebuilt them july of last year and replaced the stator about the same time.

What would you reccomend decarbing the exhaust ports with?

Thanks for any and all help guys

 

[bcsnare]

Re: force 125 '84 question

I also wanted to post that my first indication of something being wrong was only having a top end of 3800-3900 rpm. I believe it was around 4600 at wot last summer. The last time i used it, i went to head in and it took nearly a minute to get out of the water and then only had about 3200-3400.

 

[Frank Acampora]

Re: force 125 '84 question

Unless it is cracked there is no need to replace the stainless plate. They all warp to some degree from the heat of the exhaust directly impinging on them.

With a broken head gasket as you described, the engine was only running on three cylinders so the RPM would be way down, starting might be difficult and idle would be poor.

 

[bcsnare]

Re: force 125 '84 question

yea, that sounds about right. Any recomendations on the gasket sealant? permatex? Do i need to use that on that aluminum plate as well?

Its possible that the gasket was just old and went bad. I was curious if the unbalanced build up of carbon was an indication of a potential reason it failed.

any suggestions as to whether or not i should remove the build up on the exhaust ports and upper half (top 2 cylinder) of the manifold? or should i just do a decarb at some point after i put it back together? im uncertain of whether or not that would remove all the gunk, but im sure it would clear the exhaust ports.

thanks,
scott