I have a G-38 that had a new ring and Bearings installed by Bennett - was in a corn field hiding for 3 months and took on alot of water. This engine was running fine before being lost. It now does not seem to peak out and runs a little rough. We pulling a loop it sputters some in the loop and for about 5 seconds after pulling out. The pump diaphram is probably 6 years old. Do you think that I have a fuel flow problem? I can replace the pump parts. I am getting about 7200 RPM with a Zinger 18 - 6/10 prop. Any thoughts would be appreciated.

Ted B.