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    Merc 500 parts interchange

    I've got two Merc 500's. One is a 1961 and the other is a 1976. The later one has a blown powerhead due to somebody (not me!) rebuilding it wrong. The other seems to be good but the starter is bad. Can I use the electrical system parts and carbs from the 76 merc on the 61? Will any parts...
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    Need help estimating worth of a boat

    I have a 1975 Sunset 16' (Sidewinder clone) speedboat that I want to sell. It has the original Merc 800 in good running condition and the boat is complete and in great condition. The color is a bit sun faded but that's about the only problem with it. We had it out on the Columbia several...
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    1968 Merc 650 won't go into reverse

    Hello: I finally got my 650 put back together after replacing the short shaft with a long shaft housing and rebuilt lower unit. Now it won't go into reverse. Shift cam was against the follower in forward and shift guide on the power head was all the way forward when I put the lower unit back...
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    68 merc lower unit won't come off

    I am trying to remove the lower unit from a 1968 merc 650. Have removed all the bolts and nuts from front and rear (trim tab bolt, bolt under the trim tab and the nut under the mount), and loosened the two in the middle (they won't come off until the unit is free, not enough room). The long...
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    61 Merc 500 vacuum switch?

    Hello. I'm working on a 1961 Merc 500 4 cylinder engine. Don't have a manual for this motor, although I have ordered one. It hasn't run for several years, but it is complete, fairly clean, wires mostly in good shape. Was putting it back together when I noticed two wires, red and black, with...
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    '72' Merc 650 timing issue

    Hi; I've been working on a friends motor, a 1972 Merc 650 4 cylinder. It ran fine until the corroded distributor wires shorted out at the distributor. Put in a new distributor and used the old cap. Did not remove the flywheel or any other components. Now the TDC mark lines up with the...
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    Force to Mercury conversion

    Hi: I need some advice. I pulled the blown 1985 Force 50 off my Bayliner and am replacing it with a 1968 Merc 650 (Cause that's what I found and could afford). I can use the steering control as is. The steering cables from the 68 are too long and I would like to use the cables from the...
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    compression problem

    I recently bought a 14' Bayliner Capri with a 1985 Force 50 on it. It runs, but when I put it in the water and advanced the throttle it died every time. Checked the compression and it has well over 100 lbs on one and 0 on the other. It also has a leak in the lower unit, letting water in. got...
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    Idling problem and more

    HELP! I just bought a 14ft Bayliner Capri with a 1985 Force 50hp, Model 507X5A, Serial 1608. Motor idles with intermittent miss, quits immediately when put in gear. Idled at dock for 10 min today, never warmed up, and didn't smoke. spit water out exhaust when it missed. Also, there is a...
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