I just rebuilt the carburetor on a Johnson 9.5 motor and it runs great while in neutral gear. When I put it into forward gear, it runs fine at low speed but when I get at higher speed the motor seems to bogg down considerably. When it does this I can stop and put it into neutral and rev it up and it doesn't bog down. Twice I have had the boat planed out and running pretty fast for a few minutes but most times it just bogs down. I have no idea what could be causing this. Any suggestions? When I rebuilt carburetor I cleaned out entire thing including the high-speed jet and replaced float. I already bought brand new gas tank and fuel line hose and cleaned fuel filter. Please help!