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Hi All,

I'm working on restoring an older 3.5hp Briggs and Stratton engine with the pulsa jet carburetor which hasn't ran in 10+ years. I'm able to get the engine running, but it will only idle and not rev unless you manually flap the choke plate. I'm thinking it's not getting enough fuel pressure to run the engine at higher speeds.

I replaced the diaphragm between the carb and gas tank (non OEM model), cleaned the carburetor and gas tank very well, cleaned the crankcase ventilation system, and replaced the ignition coil. However no such luck getting the engine to run at higher speeds for mowing. It's used on a Snapper Hi-Vac lawn mower.

What other areas should I check?


Thank you!

My experience with older engines that have set up - bite the bullet and get a new carb.

Please post model, type and code numbers for the engine. That way we will know exactly which engine and which pulsa-jet carb you have.

He already has a thread on this issue here