throttle plate missing - Snowblower Forum : Snow Blower Forums
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post #1 of 11 Old 07-11-2015, 06:30 PM Thread Starter
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throttle plate missing

A friend gave me his old craftsman snow blower that has a tecumseh 8Hp motor. He told me it just stopped . I was tinkering around with carburetor and discovered that I could lift up the little shaft that is attached to the throttle plate, I took carb off and couldn't find the plate or little screw that holds it on and also can't crank the engine. So I'm thinking the plate got sucked up into combustion camber and is stuck somewhere. Has anybody had a similar experience?
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post #2 of 11 Old 07-12-2015, 01:21 AM
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The valve probably fell out on the ground, it is most likely the screw that got sucked in. Stranger things have happened though. Pull the head off and valves out and see. I have seen those little screws really do a number on the cylinder wall when they get caught between the cylinder and piston.
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post #3 of 11 Old 07-12-2015, 09:52 AM
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Good idea to pull the head and inspect the cylinder and piston.


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post #4 of 11 Old 07-13-2015, 08:29 AM
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Quote:
Originally Posted by Kiss4aFrog View Post
Good idea to pull the head and inspect the cylinder and piston.
Very good idea. I have a parts engine where one of the larger screws was ingested by the engine. Did a real number on the piston.
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post #5 of 11 Old 07-13-2015, 12:54 PM Thread Starter
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I found the plate, lodges behind the valve stem and worked it loose quite easily. The screw could still be in there as I can't crank it and I don't try very hard, The piston is more or less at the top and when I look in the intake I think I see two fine lines going around the piston but they don't look like a ring. I don't know if the piston is going up or down but think that screw was just stuck a bit if I move the piston up or down I might be able to dislodge it with very little damage. The guy I got it from told me when it first stopped he could crank it.

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post #6 of 11 Old 07-13-2015, 03:40 PM
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I would just assume that screw is in there jaming it up. You are still going to need to pull the head.
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post #7 of 11 Old 07-13-2015, 06:51 PM Thread Starter
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I would just assume that screw is in there jaming it up. You are still going to need to pull the head.
I think you are right, but the head flange bolts are really on there.
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post #8 of 11 Old 07-13-2015, 09:08 PM
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to make the head bolts come out easier, smack them with a hammer to unsieze them. that plate looks like its going to be a nightmare to get out, also did a number on the intake port where the manifold gasket sits
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post #9 of 11 Old 07-15-2015, 10:35 AM
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You'll want to use a new gasket when you put the head back on.

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post #10 of 11 Old 07-15-2015, 10:22 PM
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Once the head is off, will need pics of the bore.
Hopefully not much damage, and if you soaked the head bolts with penetrating oil and smacked them a few time's with a hammer, they broke loose.
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