Simpson msh3125 pressure washer stalls under load

Have you checked the fuel and air filter?

Stalling under load usually means it’s not getting enough gas or air. You need to adjust the carb float, there’s a tab you adjust up or down to increase or decrease the rate of flow of gas. There’s also usually a screw or two to adjust the mix ratio of air to gas. It’s also possible this screw is too loose and you are not running a rich enough mix of gas to air ratio.

Best thing is to youtube your motor and ‘how to adjust carb’.

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Stalling under load usually means it’s not getting enough gas or air.

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This, and most likely a fuel problem since it works a little while choked. My bet is that the unit was stored without running it out of gas and the carburetor has gummed up a bit.

Two options: take the carburetor apart and clean it thoroughly (including the needle jets) with a solvent such as Brake Cleen, etc. Or, look up the specific carburetor needed and order from Amazon (about $30).

Im going to try this thank you

Glad you got it fixed!