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    Prop does not spin when shaft is turned....What's broke?

    I have the lower unit off my 1971 mecury 650. There is something wrong with the gears as it will not shift into gear correctly. I adjusted the knob so it should be in gear, but the prop does not spin when I twist the drive shaft by hand. When I turn the prop by hand it moves in both directions...
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    71 Mercury 650 not going into gear

    It is not a cable issue. I changed lower units on this engine because the one on there was leaking. The old one ran perfect with the exception of the leaking seal which can't be changed without destroying the casing....trust me...it can't be done. The "new" one fired up fine and the RPMS...
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    1971 Mercury Lower Unit Question

    I have 2 mercury 650 outboards and I am pretty sure they are both from 1971. One engine works great with a banged up lower unit. I want to use the lower unit from the other engine but am not sure if it will work. I do not want to try it and ruin the good engine so I figured I would post the...
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    Mercury 650 Lower Unit Exchange/year look-up using serial number

    I have two Mercury 650 outboards. Serial # on Motor "A": 3154237 Serial # on Motor "B": 2992811 I have done research and have found that serial numbers 2803562-3293183 are 1970-71 models. That same site states that: 2803562-2874263 are 1970 2997339-3293183 are 1971 That means motor "A" is a...
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    1971 Mercury 650 Idle and Throttle/shifting cables

    I have two issues right now. The first is when the engine ('71 Mercury 650)idles, it seems to rev up for a bit while sitting there and then comes back down to idle without me even touching the control. I just put in a new switch box/coil pack due to the other one being junk. It fires right...
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    Ignition Switch Replacement help needed.....PLZ SAVE MY CAMPING TRIP!!

    I am supposed to go camping with my boat tomorrow but can't for the life of me find the answer to this: 1971 Mercry 650 (65 HP) Serial # 299821 The guy wouldn't give up the ignition switch with the motor so I went out and got: Sierra MP41070-2 Push to Choke ignition switch Wires coming from...
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    1971 Mercury 650 Ignition Switch...Lost in The Wiring..PLZ SAVE MY CAMPING TRIP!!!!!!

    I am supposed to go camping with my boat tomorrow but can't for the life of me find the answer to this: 1971 Mercry 650 (65 HP) Serial # 299821 The guy wouldn't give up the ignition switch with the motor so I went out and got: Sierra MP41070-2 Push to Choke ignition switch Wires coming from...
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    40 HP Evinrude Lark V Runs "ok" but has trouble starting.

    It's an older Lark V and Sometimes it starts right up (not often) and runs ok. Most of the time though, I have to play with the choke and even leave the door on the motor open in order for it to run. It turns over strong but getting it to fire can be a hassle. For the most part when I do get it...
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    Newbie looking for some advice!!

    Hey all, I have been reading these posts for a few weeks since I started my restoration project. I was given an olde (1960s ??) 16' fiberglass fishing boat. I put in a new floor and now have to decide how to distribute the wieght (gas tank and battery). From what I understand, I should have...
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