Toro 418ZE will not prime or start - Snowblower Forum : Snow Blower Forums
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post #1 of 3 Old 08-20-2018, 03:49 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, 10:44 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, 11:58 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.

1995 Toro 724 with Predator 212cc, 1988 Toro 521
1980 Toro 421, 1995 Craftsman 524
1997 Toro CCR 2500 & 1994 Toro CCR Powerlite
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