Scored Cylinder Walls & Repair

[computerdude00]

Just picked up a spare powerhead for my 1988 Force 35 on ebay. I inspected it last night, and it has great compression on the upper cylinder, bad compression on the lower. Turns out that the cylinder walls on the lower are scored by what I presume is a loose piston pin. I think that the retainer ring probably came off and allowed the scoring to take place, but I'll need to split the case to verify this.<br /><br />The powerhead is in excellent condition other than this problem, and the seller neglected to mention this condition when I asked for what problems the powerhead had.... oops. So, my question is what remedies are available for this condition; I know I can have a shop ream the cylinders out up to .03 oversize, however if the scoring is too deep, are there any other solutions? Can the steel cylinder insert sleeve be replaced, or is this block trashed?<br /><br />Thanks for any help!

 

[Waterbugtoo]

Re: Scored Cylinder Walls & Repair

Yes, you can replace the sleeve if it comes to that.

 

[computerdude00]

Re: Scored Cylinder Walls & Repair

Roger that... found a couple of similar topics when I searched the past posts in the forum. Looks like a good machine shop can complete the work.<br /><br />Next question: Anyone got a good, yet not to expensive shop to recommend for this work? Any idea of what a reasonable price would be for resleeving and boring 1 cylinder back to orginal stock spec?

 

[rickdb1boat]

Re: Scored Cylinder Walls & Repair

computerdude00 <br />I would say you are looking at $250.00-$350.00 to resleeve and rebore the cylinder, maybe less if you find the right shop.

 

[computerdude00]

Re: Scored Cylinder Walls & Repair

Thanks for the info guys- the internet is a wonderful place. Looks like to resleeve 1 cylinder is going to run around $250, however if the scoring isn't too deep I can bore both cylinders, then replace both pistons and rings for about the same amount, or maybe a little less.<br /><br />I'll measure out the depth of the scoring tonight and figure out what needs to happen.