fried okra
Recruit
- Joined
- Aug 15, 2010
- Messages
- 3
I just took delivery of a 2002 boat with 25hp Mercury two cylinder, four stroke, which is sourced by Tohatsu I believe. I tested the engine on a flush muff about a month ago and it started and ran fine, although idled a bit fast. Meanwhile I've been waiting for the guy to get the title straightened out. The boat and motor are as new with maybe a couple hours max on the motor.
I bring the boat home and it cranks a couple revolutions and then stops. I pull the plugs and it looks like it may have hydrolocked in the upper cylinder with fuel. The 100+ degree temps have pressurized the plastic fuel tank with the vent closed so I assume the carb and cylinder may have been flooded with fuel. The battery is fully charged. I put the lanyard switch in the off position with the plugs out and crank if for 10-15 seconds to clear any fuel from the combustion chamber. It sounds normal while cranking with the plugs out. I reinstall new plugs and it cranks a revolution or two and then stops, like something is restricting crank rotation or doesn't have enough cranking power. It does the same thing with the lanyard in run or off position. Again, the battery is fully charged and it acts the same when jumping a car battery across the boat battery.
I don't have a compression gauge yet to fit the small plug thread but that will be my next step.
Any known problems here, or anything I am missing, or any suggestions?
fried okra
I bring the boat home and it cranks a couple revolutions and then stops. I pull the plugs and it looks like it may have hydrolocked in the upper cylinder with fuel. The 100+ degree temps have pressurized the plastic fuel tank with the vent closed so I assume the carb and cylinder may have been flooded with fuel. The battery is fully charged. I put the lanyard switch in the off position with the plugs out and crank if for 10-15 seconds to clear any fuel from the combustion chamber. It sounds normal while cranking with the plugs out. I reinstall new plugs and it cranks a revolution or two and then stops, like something is restricting crank rotation or doesn't have enough cranking power. It does the same thing with the lanyard in run or off position. Again, the battery is fully charged and it acts the same when jumping a car battery across the boat battery.
I don't have a compression gauge yet to fit the small plug thread but that will be my next step.
Any known problems here, or anything I am missing, or any suggestions?
fried okra