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    87 force 50 only firing on one plug

    i have swapped top to bottom everything from the plug, wire, coil, and all i can get is spark on one cylinder all of the suddon. i'm going to upload a few pics of what i found, one of the plate with the serial number, and a closeup of the switch where i found a connection corroded off. can...
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    prop question for 500 EL thunderbolt 4cyl

    i have a 500 merc i'm getting ready to do a prop swap on. its on a 1648 16.5x72"at floor. it weighs about 500lbs without the motor on it. i'm thinking i should be able to push a pretty big prop with my hull considering its weight and my motor having enough power to get it up on plane...
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    installed momentary pushbutton switch to start. now it wont kill in the off position

    i installed two switches on my 1975 500 4cyl merc. one for of and on to the switchbox (white-red). and on the start switch (yellow-red) it worked great. but now for some reason when i turn it to the off position the motor stays on. the only way i can kill it is to manually close the...
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