Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I cant seem to get my Toro walk behind mower to run.It will start if zi spray gas in the carb,but the primer doesnt push gas into the carb,it only pumps air.Do I need a new carb and are they expensive? New mower instead?

http://www.abbysguide.com/ope/discussions/11574-A-1.html

Zonk,
IF.................priming is the only problem that you are having.......
Remove the air filter cover, the air filter, and then the backing plate too the air cleaner. (3 - 5/16 screws.)
Between that backing plate...and the carb face...there is a (1) gasket. (Get (2) of those gaskets and replace them.)
Those gaskets deteriorate and....the backing plate warps. The extra gasket helps seal the warpage and allows a positive charge of air too enter the bowl..and push the fuel into the throat of the carb.
IF.....you dont see the fuel squirting into the thoat of the carb...you could have other problems. Then we go from there.

zonk, as you can see from my previous post, i just had the carb replaced on my 10+ yr old GTS 450 Toro. I'm still finding it hard to start. The carb replacement cost me about $150. Like someone said, be sure you troubleshoot for a different source of your problem.

Thanks for the replys.The mower is about 6 years old,but its in great shape other than the inability to start.

I took the carb apart and cleaned everything..it doesnt seem to have any restrictions to gas flow anywhere.'

It has a black primer "button" on the carb that is used to prime the carb before its starts,I did notice a couple of what looked like very small holes in the rubber.I`m wondering if thats my problem,and if so,are they a hard replace? Part to get?

That may very well be your problem. Since there are holes, it is not creating enough vacuum to suck then push the gas in as you prime. Hence your getting only air when you try to prime it as you stated in the first post. Good detective work! If you can take the carb out and do what you did, you shouldn't have a problem replacing that part.