C# 766-8666-1 Mercury 1976-1990 .015 Oversized Piston 175 200 220 225 HP CLEAN

We have taken the time to professionally clean and inspect this piston. We vapor blast the whole piston to remove all the build-up grease, grime, and carbon. This gives us a chance to fully inspect the piston that is now in like-new condition. We do this so you have a sound mind about the product you are buying, but to ensure that we are selling an excellent part that won’t damage your powerhead. We even clean out the ring grooves, so you can purchase this with confidence.

We differentiate pistons 2 ways. We sell them as “A” parts or “B” parts. “A” parts are essentially perfect. No wear whatsoever. They’re in like new condition. “B” parts are pistons that have a bit of minor wear. This may be a very small ding or a rub mark. They’re still in perfectly good condition and very usable, but they have an inconsequential mark of some kind. “B” pistons will be a little bit cheaper but are perfectly fine to use in an engine. 

The piston in this listing is considered to be a "B" part. As seen in the pictures, there are a few dings around the edge of the piston and some light scratches on the skirt. This is entirely cosmetic and will not affect the overall performance. Everything pictured is what you will receive with this purchase. 

Please note that we will not accept returns for this item. Please be absolutely sure this is the correct one for your motor prior to purchasing.

Location: Southcentral Outboards, Altamont, Illinois

We have provided this cross-reference with the resources we have available in regards to fitment. This most likely will not fit every model for the years and horsepowers we have listed. We urge you to make sure this is the exact item you need by matching the part number to what is required for your motor. If you need help doing so, please contact us prior to purchasing and we would be happy to help!