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#11
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The rule of thumb on that is that there shouldn't be more than 10% difference between the cylinders. At 87 vs. 100 you are exceeding that. Is this motor on a boat or a stand? Reason being is that what a motor does in the driveway and what it does in the water under load can be two totally different things. My 150 Merc was only running on 3 cylinders but sounded like a dream on the muffs...in the water wouldn't do squat. Ferm thinks its priced high anyway...maybe you want to pass on that one.I'm sure some of the motor gurus will come along and chime in soon.
__________________
 89' V20 projectSoutheast Coastal Georgia 
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#12
08-13-2009, 01:21 PM
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The motor was on a stand and had been run for a minute or so. Fair amount of smoke like some have mentioned. Yeah, I'm leaning heavily away from this motor but just wanted other's opinions on the compression readings.
Thanks, Rey
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#13
08-21-2009, 02:09 PM
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I'd walk away - too many better situations out there to get hung up on a weak one.
Compression is below the 10% range the other guy suggested. Unless you want to buy it for $ 1,000 and rebuild, forget it. Try ARG Marine's web site, Florida. Ask for Victor. I bought my used outboard there after SERIOUS shopping around. Had it shipped up to NJ, and was very careful about everthing. Well, I got a great engine, saved a pile of money, and they shipped it in a strong sturdy crate. Good people in my experience, because I asked a LOT of questions and they answered to my complete satisfaction. Regards
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#14
08-21-2009, 04:42 PM
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I agree. For a 15 year old motor, that is a high price., In that price range you can shop for something a lot newer than that.......
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#15
08-21-2009, 05:49 PM
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Quote:
13 lbs difference > 10% variance...I'd keep on lookin'... 
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha 
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