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« on: August 08, 2013, 10:05:14 am »
I have been working on a friends grass cutter for sometimes now with no progress. It is a 1980 Craftsman with a Briggs 18hp horizontal and a Walbro LMH carb and an autopulse fuel pump. He brought it to me complaining of low power and a surging that would only go away if the choke was closed about 3/4.
After rebuilding the carb, and fuel pump, checking hoses, cleaning the tank and a new filter and replacing the rings because he insisted the surge is still there. I put a clear filter on it so I could see fuel flow and I noticed that it would not fill the filter completely. I suspect this is causing the issue of not getting enough fuel to keep the bowl full. I just can't figure out why it is doing this.