samedi 29 avril 2017

Briggs 9P702 hot starting issues - Husqvarna 5521P

New to the forum. I like to rebuild and fix lawn mowers for fun. I have kept my 1973 Lawn Boy running for years.

I recently acquired a Husqvarna 5521P mower for free because it didn't run. It needed some obvious stuff, which I did:
new muffler (and auto-choke mechanism) - old one was frozen up
cleaned the carb out really well
new spark plug
new control cable

The mower has a Briggs 9P702-0010-F1 motor on it, which is the 550EX, I believe. Starting from cold, this thing fires right up and runs strong. If you shut it down long enough to empty the bag or drink half a beer, it won't start back up. If you let it hang out for maybe 15 or 20 minutes, it'll start again.

I'm confident the choke mechanism is working properly, since it's new. I read somewhere to check the valve lash, which I did. It was not adjusted properly, so I adjusted it to the factory spec. I'm currently sitting here waiting for the RTV to cure up on the valve cover before I give it another whirl.

What else could cause issues with hot starting?


Briggs 9P702 hot starting issues - Husqvarna 5521P

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