6637A3 C# 745-5208 Mercury 1978-1980 Standard Piston 3 Ring 140 150 HP

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. This is because there is no real damage to this piston. There are a few light scratchs in the piston skirt, but not anything that is raised and will affect the performance. 

This does not come with any hardware. There is some minor pitting on the dome, and small knicks. please see pictures.