Join Date: Feb 2001
Location: Bremerton, WA.
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O/T Old Mercury outbaod question
HEres the scoop, bought a 1955 14' Thompson wood boat on Manday witha 1961 Mercury Mark 35 (4cyl 35hp) outboard on it of unkown status other than it runs.
Monday night put boat in water, myself and two friends (about 560lbs total) and the boat went fine got on a plane and went about 30mph.
Tuesday night same thing
Wednsday night my brother in law and I wetn out and it felt like we were going slower than previously but such a small difference thought we were fighting the wind or current.
Thursday I put new plugs in it (same brand and model) and the night started of okay. I then had a friend and his wife jump in (around 475lbs total) and could not get on a plane, even thought it was at full throttle, it didn't seem to be revving very high. We played with the idle fuel mixture screws to no help. On the way back to the ramp it was at full throttle, but barely running, but can rev up fine in nuetral. When you do rev it in neutral it seems to have a miss, then cleans out.
I have not ran a compression check or anything else yet.
I am leaning towards ignition problems thinking that the points could be old and when the new plugs were installed the points are now failing when a load is applied.
Does this sound feasable? ANyone know if the early Merc's have an opening in the flywheel to view the points, or does it need to come off?
Do they make point conversion kits (like pertronix) for outboards?