1985 merc problems

[Pauluswithashitboat]

Ok I have a 1985 Mercury 50hp 4 cylinder two stroke it ran fine on my last fishing trip until the last day. It simply would not start...

so I removed the carbs and had them rebuilt by a mechanic. Finally got around to reinstalling them. Still wont start.. I pump the primer bulb until fuel spills out of the carbs crank the engine over... and nothing. I removed the plugs and bone dry. Boat has decent compression, good looking spark

 

[Seastoke]

Ok I have a 1985 Mercury 50hp 4 cylinder two stroke it ran fine on my last fishing trip until the last day. It simply would not start...

so I removed the carbs and had them rebuilt by a mechanic. Finally got around to reinstalling them. Still wont start.. I pump the primer bulb until fuel spills out of the carbs crank the engine over... and nothing. I removed the plugs and bone dry. Boat has decent compression, good looking spark

have you tried the plugs to see if they spark.

 

[Pauluswithashitboat]

have you tried the plugs to see if they spark.

Yes spark is good

 

[QBhoy]

Sounds like your floats are sticking up, would be the obvious answer. Especially if your plugs are dry and fuel flowing out the carbs.

 

[Rappey]

Fuel pump ? It's often a small square thing traced by following full lines, if it has one.

 

[Seastoke]

Well if it was me I would have to involve the guy who did the carbs asi can’t see how he knows they are good without setting them to the engine .

 

[Rappey]

Fuel spilling out of carbs when pumping the primer bulb suggests float level is completely wrong as no fuel should spill out