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Old 09-05-2009, 11:22 AM   #1
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Default Engine help needed!

When i was driving my truck a stone went into my carb (My air filter keeps coming off ) and blocked the engine, so i took off the piston head, pullstart and carb and managed to get it out.Then i put the engine back together and started it but the engine revved up to full revs and i tried to cut the engine by putting my finger over the muffler and it didnt stop, taking off the fuel leads it didnt stop, it only stops when I put a finger on the carb. I am now frightened of starting it. It keeps happening.
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Old 09-05-2009, 11:27 AM   #2
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Did you install your throttle link back onto the carb?
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Old 09-05-2009, 11:37 AM   #3
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Been there done that ahh, a time or 2.
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Old 09-05-2009, 11:39 AM   #4
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Did you install your throttle link back onto the carb?
yes its on even with the throttle closed its still on full revs.
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Old 09-05-2009, 11:51 AM   #5
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lean?
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Old 09-05-2009, 12:10 PM   #6
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Look down the carb neck & see if the low speed needle is bent causing the throttle slide to feel closed when its not.That needle should go about 3 mm into the hole on the opposite side of the carb.

Did you take any screws out of the carb? like high end,low end needles or idle screw or is the carb clamp bolts sitting in its hole propperly?
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Old 09-05-2009, 12:32 PM   #7
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Look down the carb neck & see if the low speed needle is bent causing the throttle slide to feel closed when its not.That needle should go about 3 mm into the hole on the opposite side of the carb.

Did you take any screws out of the carb? like high end,low end needles or idle screw or is the carb clamp bolts sitting in its hole propperly?
The high end and idle screw are still in and my carb has a screw from one side of the neck to the other is that the clamp?
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Old 09-05-2009, 01:03 PM   #8
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Maybe an airleak. Put some soap foam on the engine (carb, backplate etc.) and while u hold ur thumb on the carb opening u blow air into a fuel line to the engine. Then u'll see bubbles coming from the foamed area.
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Old 09-05-2009, 01:12 PM   #9
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Maybe an airleak. Put some soap foam on the engine (carb, backplate etc.) and while u hold ur thumb on the carb opening u blow air into a fuel line to the engine. Then u'll see bubbles coming from the foamed area.
I think you are right but if i do have an airleak its probably because of the cylinder head any tips about screwing that on properly also the glow plug is hitting the cylinder.
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Old 09-05-2009, 01:19 PM   #10
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screw them in this order: http://www.hpieurope.com/graphics/wa...nehead/009.jpg

dont tighten them all the way. If they're all screwed in then u can tighten them snug. Oh for the plug, did u use the copper washer?
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Old 09-05-2009, 01:35 PM   #11
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This is starting to sound strange. What exactly did you mean when you said a stone blocked the engine?

If you didnt tighten the head back down propperly that could be a huge air leak also. To tighten the head screw in all the screws just finger tight then snug them down equily in a criss cross pattern & just a hair more than what most people consider snug,like 1/8 a turn after finger tight.

The part that scares me now is you say the glow plug is hitting the cyl? Do you mean hitting the piston? You didnt leave any big round shims off the top of the eng when you put it back together did you?

If the piston is hitting the glow plug then its a simple fix.Just take the motor out of the truck,throw eng in trash & install new motor & that will fix the problem guaranteed. This time put a zip tie around the air filter to keep it on the carb.
Good luck
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Old 09-06-2009, 11:38 AM   #12
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Originally Posted by butch man View Post
This is starting to sound strange. What exactly did you mean when you said a stone blocked the engine?

If you didnt tighten the head back down propperly that could be a huge air leak also. To tighten the head screw in all the screws just finger tight then snug them down equily in a criss cross pattern & just a hair more than what most people consider snug,like 1/8 a turn after finger tight.

The part that scares me now is you say the glow plug is hitting the cyl? Do you mean hitting the piston? You didnt leave any big round shims off the top of the eng when you put it back together did you?

If the piston is hitting the glow plug then its a simple fix.Just take the motor out of the truck,throw eng in trash & install new motor & that will fix the problem guaranteed. This time put a zip tie around the air filter to keep it on the carb.
Good luck
I think its just a airleak because the cylinder head isnt screwed on thanks for your help though. The glowplug is fine it was screwed on realy tightly so i unscrewed it a bit and now its fine.
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