Author Topic: Husky 450 X Torq No Start Condition when saw has been refueled  (Read 166 times)

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Offline Wade

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Husky 450 X Torq No Start Condition when saw has been refueled
« on: September 23, 2014, 04:36:24 pm »
 
  Well I ended up with a challenge, my neighbor came over with what I think is about a 3 year old saw. Its a 450 and has always run good. But this summer he ended up with the saw not starting after he would refuel it. I read about the possible fuel tank ending up pressurized so I checked for that. I read in the Manuel about a check valve under the recoil cover. I am not sure how that works . It looked like a steel dowel with a score mark about 1/4" long in the middle. Pulled it out and put it back in. Fuel filter is good, and a new spark plug. Have any of you experienced this ?  I have older saws and they have slots in the carb screws so I didn't try any carb adjustments. I did try adding a small amount of fuel into the carb but it made no difference.  I also checked for spark and it was there. If the saw sits for a few hours and cools back to the ambient temp it will start.
 Please share your thought's.

Thank You for any help you can give me.
Wade

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Offline aclarke

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Pull the plug and check for spark when it's in the won't start mode. If it has spark I would think it's flooding, perhaps tank vent still. You could try removing the air filter and cover and hold the throttle open and see if it re-starts, if it does, that would be good indicator its flooding


Offline KilliansRedLeo

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+1 Adam, the saw is probably flooding.
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Offline Wade

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Thank You for the fast reply. Is there a way to check the vent visually ? Any history with the carbs needing a rebuild after x number of time ? Looks like a beast to get the carb out . IS it better to rebuild this style carb or replace it ?  I wish I had off Wednesday so I could work on it. When this is figured out I will let you know what was wrong.

Thank You
Wade

Offline jmester

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you could also try and leave the fuel cap a little lose when you refuel it when it is hot and see if it restarts. If it does start I would look towards the tank vent as the problem. As mentioned above check for spark when it is hot.
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Offline Wade

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Are there any pictures of the tank vent some place. I guess I picture more than what I saw based on what the service book showed. Also If I do need to address the carb, should I rebuild or go with a Zamba ?

Thank You
Wade

Offline aclarke

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Wade
Looks like there is the slotted rod you looked at as well as a small plastic " vent"  pressed into the same hole.  Not real familiar with this set up. My guess is the vent filters crap from entering the grooved  rod that vents the tank?

Offline Wade

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I think I have the part picture. I also found the slotted rod. I will have the saw back over the weekend. It is flooding as it sits there after a refueling. You can see the fuel white vapors coming out of the lower part of the black plastic carb air horn area.

Offline aclarke

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Study the plastic where the rod is inserted, could be that the rod is pressed in and the plastic compromises the slot, not allowing it to vent.  If the vent turns put to be ok,  Pull the carb apart and install a carb kit in it.  If the metering needle is not sealing properly because it has been compromised by bad gas or if the fulcrum arm fork is bent it will allow the needle to leak and flood the saw.

 

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