Boring/honing low compression cylinder

[mbrownone]

Is it considered an acceptable and normal practice to repair just one cylinder in an outboard power head? I have a 1986 90hp vro engine with compressions 120,120,70,130. If I repair the #3 cyl and replace with oversized piston and rings it will restore it to a much higher lbs reading. Will this cause any strain or problems for the remaining engine parts? I'm guessing I will then have a power head with 120,120,150,130 (or similar...) in compressions. Bad idea?? Thanks for advice and comments. First time forum user.....

I should ad that i found the carburetor for that cylinder was the source of the problem. All carbs will be rebuilt and cleaned. VRO pump appears fine but will likely convert to premix gas after repair. I just bought the motor from a previous owner.

[Bernie H]

Repairing #3 cyl

Your engine will not have a problem with a new oversize piston ***y. First the oversize piston should weigh within specs with the other three, so balence not an issue. Compression most likely not be as large as you think, engines run with different compression psi for years, you only notice it because you sensed a power drop-off. I'll bet the new cylinder is within 15-18% of the other three after repairs. Now, make sure the machine shop doing the rebore can perform the job without catching their carbide tool in the ports and chiping out the cylinder wall. If you're planning on just honing the cylinder, better check the bore for wear carefully, and NO SCORES.
Food for thought,,,,,,Bernie H