I received a Craftsman push mower (Model 917.377543) from my sister. She had left it outside all winter in the snow/rain.
I have got to the point where the mower will run for 15-20 minutes initially before dying (it runs good when it does). After that, I have to let it sit for 5-10 minutes before it will start again, and it will only last 5-10 minutes, and eventually will stop starting.
Heres a list of things that I have done (the mower wouldn't start at all at first)
- Replaced the air filter
- Removed old gas & oil and replaced
- Took the carb apart (the bottom tin can part) and cleaned with carb cleaner. This is what got the mower running in the first place.
- Replaced rotted gasket in the carb
- Mixed some cleaner into the gas to help clean the engine out as well
- WD-40'd necessary spots
Is there anything else I can try to get this thing running? I am about to just go buy a new mower, but I am no mechanic so there may be something else little I can try out.
The only other part visible on the mower that may be the culprit is this black tube that i believe is hooked up to the oil tank, and it runs near the carb, it is rotted at the end and it seems air may be able to get in. Looking at the engine parts here, it may be the 'breather tube' (part #12). Would this make sense with what is happening (shutting off after some use)
Another thing I notice when it shuts off, is that if I remove the oil cap white smoke comes out. Is this normal?
(I can try to get some pics of the tube that is rotted when I go home)
Best Answer
Check or replace your gas cap. Looks like it is not venting properly. Try it with the gas cap loose or adjust it occasionally while mowing.