Toro 418ZE will not prime or start - Snowblower Forum : Snow Blower Forums
 
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post #1 of 3 Old 08-20-2018, 02:49 PM Thread Starter
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Toro 418ZE will not prime or start

I was performing maintenance and cleaning on our 418ZE snow thrower and noticed that it would not start and no fuel was getting to the motor. The spark plug was dry.

I inspected the carburetor and noticed a small pin hole on the top of the carb where the primer bulb was. I put my finger on the hole and it primed and started.

However, after starting the RPM is erratic. If I put my finger on the hole the RPM is steadier.

Is this hole supposed to be there ?
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post #2 of 3 Old 08-20-2018, 09:44 PM
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You have a vacuum leak.

Where is the fuel tank?
Is the primer bulb still intact?????
Is it a black rubber button and does it have a hole in the center of it??
My Toro snow pups have to have a hole in the primer rubber in the dash to work properly.

Another example are my Stihl weedwackers, blowers and chain saws and my old Homelites where they have a solid primer bulb with no vent hole in the center to pull fuel up into the carburator to start them.

My Toro snow pups need to just start a brief vacuum to prime them start them as the tanks are such that it pulls the fuel down into the carburator.
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post #3 of 3 Old 08-20-2018, 10:58 PM
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can you post a picture of the carb? showing the pin hole? And I agree with leonz, if the primer circuit is open, you will have a vacuum leak into the carb. Plugging the hole while running it should run well.

Paul
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1995 Toro 724, 1988 Toro 521
1980 Toro 421, 1995 Craftsman 524
1997 Toro CCR 2500 & 1994 Toro CCR Powerlite
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