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    50 hp Force water pump change question

    I dropped the lower unit on my 1990 Force model 507F90C 50HP motor to change the water pump impeller. I found a piece of rubber, like some kind of rubber seal or boot torn in half just laying in there that I have no idea where it came from. The only two places I think it might could come from...
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    Force 50HP 1990 Tilt/Trim problem

    I have a 1990 Force 50hp model 507F90C that the trim on it makes a clicking noise at the relays when you mash the switch up and down. Does anybody have any suggestions on what might cause the trim to stop working? Thanks for any help.
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    1978 80hp Mercury No Fire To Cylinders! Need Help!

    I have been trying to crank my 1978 80hp Mercury Outboard Serial # 5004079. At first I thought it might be a fuel related problem but come to find out I'm not getting any fire to all four cylindrers. The compression test checked out fine. I just got a multimeter and DVA Adapter. Can anyone...
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    1978 Mercury 80hp wiring harness question. Wiring new key switch.

    I'm trying to wire up a new key switch to my 1978 Mercury 80hp motor. The motor has no spark at the plugs. I did some tests with an OHM meter. Looked at my engine harness wires and they were rotted. I replaced all 7 of the wires. Off the harness plug to the engine there are is big red and...
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    1978 Mercury 80 hp outboard starting problem. No fire?

    I just recently purchased an older boat with a 1978 Mercury 80 hp engine. The motor will turn over fine but will not crank. I do believe I'm not getting any fire from the plugs. I tried taking the plugs out one by one and ground them to the engine block to see if I could get a spark. No fire...
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