742B running issues

[wings5j]

Hi to you all, I am brand new to the forum, and fairly new to the Bobcat. I have a '93 742B with a gas Mitsubishi 4G32 engine. Lately I have been using it to plow snow and it goes from running great to acting like it it running out of gas. Usually it starts right up again, but has been getting more troublesome. On possibly a related note, my shop smells like gas fumes when the Bobcat is stored inside. I don't notice any leaks. Tonight I bypassed the fuel pump and installed an electric pump but that does not seem to be the issue. Any ideas will be appreciated. Thanks, John

 

[Fishfiles]

Hi to you wings5j , from what you say I would look at the carb , it may need a cleaning out , or have a bad gasket on it , it could be dripping down into the engine when parked and thats what you smell

 

[Tazza]

Hi to you wings5j , from what you say I would look at the carb , it may need a cleaning out , or have a bad gasket on it , it could be dripping down into the engine when parked and thats what you smell

If you can smell fuel fumes it does point to the carb. I'm not sure if they use float valves or not, but i would start there as they control the amount of fuel that goes to the reserve in the carb. It wouldn't be a bad idea to pull it down and clean it.

 

[wings5j]

If you can smell fuel fumes it does point to the carb. I'm not sure if they use float valves or not, but i would start there as they control the amount of fuel that goes to the reserve in the carb. It wouldn't be a bad idea to pull it down and clean it.

Thanks guys, I will pull the carb and go from there. I will be sure to post my results once I get a handle on what's going on. Hopefully soon, it's snowing like crazy here ;-) John

 

[wings5j]

Thanks guys, I will pull the carb and go from there. I will be sure to post my results once I get a handle on what's going on. Hopefully soon, it's snowing like crazy here ;-) John

I took the carb apart and cleaned it as best as I could, put it back together and installed it. When I first tried to start it, I didn't get anything. Sight glass on the float bowl showed fuel had reached the carb. I filed the points and also cleaned some corrosion off of the rotor and cap, sprayed a shot of starting fluid, and it started right off. It ran better than it has in awhile and spent about an hour plowing snow with no troubles. I have a tune-up kit on order but it takes 4 or 5 days to get stuff from the factory (look for my new thread about parts cross-reference). Thanks for the help. John

 

[Tazza]

I took the carb apart and cleaned it as best as I could, put it back together and installed it. When I first tried to start it, I didn't get anything. Sight glass on the float bowl showed fuel had reached the carb. I filed the points and also cleaned some corrosion off of the rotor and cap, sprayed a shot of starting fluid, and it started right off. It ran better than it has in awhile and spent about an hour plowing snow with no troubles. I have a tune-up kit on order but it takes 4 or 5 days to get stuff from the factory (look for my new thread about parts cross-reference). Thanks for the help. John

If it needed a snort of starting fluid it sounds like you have a problem with the choke.