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I have a a Mercruiser 4 cylinder 470 I/O 170hp from around 1987. It was working fine until I hit a rock with my new $300.00 prop.
Now I noticed a lot of oil in the bilge and checked the dipstick and there was none there....I poured a quart of oil in and it topped it up. The motor is hard to...
I recently purchased my first boat. Its a 1987 Peterborough Cosmos with the Mercruiser 470 (170hp 4cyl)
The guy that sold it to me was using a 21 pitch. He told me this was the wrong pitch for this boat.
It is damaged (chunk gone out of prop) so I cant do an RPM test on open water as the...
