Hi everyone, I’m new to the forum and want to see if you can give me any feedback on the problems I’m having with my mercury outboard engine.
The main symptoms are that the engine bogs down after about 3000 RPMs and cannot get a wide-open throttle and also The center cylinder spark plug kept fouling for the last four weeks of water test until yesterday when the top cylinder spark plug fouled.
here’s what I have done so far:
as far as the fuel system goes I have checked all the fuel lines inside the boat for cracks and air leaks, I have checked to make sure that the tank is ventilated and the Is working right. I replaced every fuel line including the priming bulb to the engine and every fuel line under the Cowell. I’ve cleaned the carburetors three times and also cleaned out the fuel pump. The old fuel line with the priming bulb that was on the boat had a liner inside of it that broke up and clogged the fuel system so I had to clean it thoroughly and replace all the lines on the engine including the fuel filter.
as far as the ignition goes. I replaced all the spark plugs and keep extras handy, I replaced all the CDM coils and keep extras handy, I replace the stater and trigger, and also the voltage regulator. After one ride on the water I noticed a voltage gauge freaking out and when I checked under the hood after getting off the water there were two connectors coming from the stater that were melted and also a gray wire connector coming from the voltage regulator that was melted. So I replaced the wiring connectors and a voltage regulator.
I am at a loss at this point and don’t know what else to try. I bought a fuel pump rebuild kit with diaphragms etc. I will replace that today. Should I actually rebuild carburetors?
Josh
The main symptoms are that the engine bogs down after about 3000 RPMs and cannot get a wide-open throttle and also The center cylinder spark plug kept fouling for the last four weeks of water test until yesterday when the top cylinder spark plug fouled.
here’s what I have done so far:
as far as the fuel system goes I have checked all the fuel lines inside the boat for cracks and air leaks, I have checked to make sure that the tank is ventilated and the Is working right. I replaced every fuel line including the priming bulb to the engine and every fuel line under the Cowell. I’ve cleaned the carburetors three times and also cleaned out the fuel pump. The old fuel line with the priming bulb that was on the boat had a liner inside of it that broke up and clogged the fuel system so I had to clean it thoroughly and replace all the lines on the engine including the fuel filter.
as far as the ignition goes. I replaced all the spark plugs and keep extras handy, I replaced all the CDM coils and keep extras handy, I replace the stater and trigger, and also the voltage regulator. After one ride on the water I noticed a voltage gauge freaking out and when I checked under the hood after getting off the water there were two connectors coming from the stater that were melted and also a gray wire connector coming from the voltage regulator that was melted. So I replaced the wiring connectors and a voltage regulator.
I am at a loss at this point and don’t know what else to try. I bought a fuel pump rebuild kit with diaphragms etc. I will replace that today. Should I actually rebuild carburetors?
Josh
