Small Engines (Lawn Mowers, etc.): Problem of Snowblower stops while underload, briggs and straton, hp briggs

Question
8 HP Briggs and Straton Motor (1970 early 80's vintage)

Toro Snowblower

The snowblower will idle forever with no problem. When I put it under load it grunts and then continues on. The engine works fine clearing snow for a while and then just stops. It will always restart with a single pull and works, underload, for a short time and then it will stop and the process can continue. It happens independant of engine operating temp. If I tip the snowblower back, it will stop. I had the snowblower into the shop but it was not repaired completely. It was better. I have replaced the headgasket at the advice of a local B&S dealer. I put in a carburator kit (did not replace the welch plugs). Nothing seems to help. Any advice would be appreciated. Thanks.

Harry Evans

Answer
Hi Harry,

Usually there are two areas to check when a loss of power occurs:  

Low compression, in your case due to an old engine.  

A lack of fuel flow to the engine.  If adjusting the high speed jet doesn't help, then I would say there is an internal problem with the carb.  Maybe something as simple as a float that needs adjusting, to allow more fuel to enter the bowl.  The engine quitting when tipped is an indicator of a float restricting the flow.

Let me know how you make out.
Michael