Info on 165hp 250ci in line 6 cyl.

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I have a 1965 bow rider with a 230 ci 6 cylinder and mercruiser. Dad bought it new from Mr. Mosley, and I got it in 1975. I have put over 1500 hours on it, and it still runs very well. It is bullet proof. I put a freshwater kit on it in 1976, so that helped. With a 19 inch prop (large ears) it runs about 42 mph. I figure 6 or 7 miles to a gallon. That is with full fuel (28 gallons), and two of us (over 240 each). It has a type 1c merc out drive, which needs to be replaced. This is very similar to an alpha. I have a v6 with alpha Gen 2 I was going to put in it, but the engine cover would not fit without modification. You can buy manifold, breaker less ignition and most anything you need cheap. Hard to beat the iron duke!