Cant get briggs and stratton DR TRIMMER to start


Old 08-25-13, 11:31 AM
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Cant get briggs and stratton DR TRIMMER to start

It has the 3.5 briggs and stratton engine, let it sit for 6 or 7 months and now it wont start. Cleaned the carb, put new gas in, replaced the spark plug and air filter gasket. Im not sure if the primer is working, but there is always gas in the carb bowl. It will start with starting fluid, but once that has burned off it dies. IM not sure what to do now with it..
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Old 08-25-13, 11:34 AM
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What model engine?
Old 08-25-13, 01:21 PM
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I can't say that I am familiar with the specific carb on your briggs 3.5, but some of the problems I have ran across are.
One or more of the jet holes that shoots gas from the carb into the cylinder on the intake stroke can easily be clogged from dried gas residue, and may be easily overlooked during cleaning.
I usually take a needle and push through the jet until I can squirt carb and choke cleaner through the hole.
Another thing that seems to cause such a problem as you've described is a loss in vacuum draw, which "can" render no gas being drawn into the cylinder from the carb.
This can be caused by a very small tear or break in one of the rubber seals or gaskets.
With what you've described, I would guess that it is more likely one of the jets still has some blockage that wasn't completely taken care of when you cleaned the carb.

Might I recommend that the next time you use the trimmer, when you finish drain all but an ounce of gas from the tank and let the trimmer run idle until it shuts off on it's own, which will help by removing all gas from the carb so that the gas cannot evaporate and leave residue to cause the problem the next time you want to use it.
Course you might already know that, but many people don't.
Good luck
Old 08-25-13, 01:26 PM
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Why did you "clean" the carburetor?
Unless you pulled it all apart and soaked or at least sprayed all the parts with carburetor cleaner and cleaned out all the ports it's not clean enough.

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