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    88 merc 150 piston meltdown

    Short recap: I've been chasing a low rpm problem with this engine; only able to get 3700 rpm with a 14.5 x 17 prop. Yesterday I put on a 16 x 13 prop, and low a behold, 5600 rpm! Ran all day long, not too hard, but tested it here and there and trolled a lot. Then, about 5 hours into the day, the...
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    Low RPM with 86 Merc 150

    Hello again. I have a recently aquired 1984 Eastern 22' lobster style boat with a 1986 Merc 150 BlackMax OB. The hull design is a V, which is relatively flat in the stern. The hull is not stepped.<br /><br />I've been working bugs out of this engine; first the oil pump alarm (which was...
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    Gas in the Oil tanks

    I recently posted about a '90 150 merc oil pump problem that I wanted to convert to pre-mix. I found the problem to be the pump sensor, which is good, but along with that, I found the motor oil tank to be extremely diluted with gas. Seemed like about a 50/50 mixture. Further, I found a lower...
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    Mercury Conversion from oil injection

    I just bought a cheap boat with a 1990 Mercury 150 V-6, and have an oil injection alarm problem. The previous owner was 'pretty sure' it was a sensor problem, so disconnected the alarm. I'm not willing to trust his judgement, so I searched the internet for info on this problem last night, and...
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