Fuel System - Snowblower Forum : Snow Blower Forums
 
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post #1 of 8 Old 01-17-2020, 05:10 PM Thread Starter
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Fuel System

My snow blower (Poulan 27) would start and die after 30 seconds. Drained the fuel and replaced with fresh fuel. Dies after 2 minutes. What I noticed when draining fuel was it did not drain in a steady stream. There was 2 litres of fuel in it. The stream was dripping. Took 10 minutes to drain the tank. What is restricting the fuel flow, as I think that is my issue?
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post #2 of 8 Old 01-18-2020, 12:01 AM
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The vent in the gas cap might be plugged. Remove the cap and see if it flows better.
Something in the tank that's covering the fuel outlet.
How old is the machine ? Maybe the fuel line is deteriorating on the inside.

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post #3 of 8 Old 01-18-2020, 12:07 AM
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Sounds almost like the float level is set too low, not allowing enough fuel into the bowl fast enough to keep it running at a higher speed. It can't recover fast enough by re-filling the bowl with fuel quick enough when the engine uses the fuel up in the bowl.
It might need a new needle seat or adjustment of the float possibly if you noticed the drainage problem from the carb bowl drain.
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post #4 of 8 Old 01-18-2020, 12:27 AM
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Quote:
Originally Posted by Snowman7 View Post
The stream was dripping. Took 10 minutes to drain the tank. What is restricting the fuel flow, as I think that is my issue?
Was that out of the hose when disconnected from the carb or through the carb with the float bowl removed or screw out of the float bowl ?

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post #5 of 8 Old 01-18-2020, 12:50 AM
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Another possibility, if that's a Tecumseh engine with the fuel line squeezed between the cooling fins behind the flywheel, they were known for swelling shut, causing low fuel flow problems. Then he would have to replace the fuel line from the fuel tank to carburetor.
A possibility.
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post #6 of 8 Old 01-18-2020, 04:26 AM
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Quote:
Originally Posted by Kiss4aFrog View Post
to SBF Snowman7

The vent in the gas cap might be plugged. Remove the cap and see if it flows better.
Something in the tank that's covering the fuel outlet.
How old is the machine ? Maybe the fuel line is deteriorating on the inside.

.
First thought right there , just did that with mine . Although ..... it didnít take more than 20seconds to konk out with a full tank. Then itís on to fuel flow as others have said. Somethings stopping fuel from getting to where it needs to go fast enough .
Iíd pull the line off the tank (full tank so it flows best) at the carb then see if it flows real solid stream. If it peters out take the cap off and if it immediately Flows full youíve found your culprit , the cap. if itís wimpy all the time cap or off look to the line being jammed between the cooling fins as others have mentioned.

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post #7 of 8 Old 01-18-2020, 05:27 AM
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post #8 of 8 Old 01-18-2020, 07:28 AM
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going by the poulan web site a 27 uses a 254 cc LCT engine , that motor has a screw in tank nipple that is also a fuel filter, which uses a ultra fine plastic screen to filter the fuel,

many times with low flow out of the tank is not corrected by losing the gas cap. it is clogged and needs to be replaced. this filter is so fine it is easy to clog and many forget or don't know it's there, as it simply looks like a connecting tank nipple

in that case in the shop we replace the filter/nipple and hose to the carb,
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