1995 johnson 175 fast strike runs fine planes good then after trolling for 1 to 2 hrs motor has to be reprimed to run, carbs rebuilt,new fuel pump, new water seperator filter new fuel filter, and new primer bulb, do i have a problem or is this normal and thanks for the input ahead of time. i'm sure i will have alot more questions. thank you from granburt, tx

Welcome to the forum. Someone correct me if I'm wrong but isn't the primer bulb the only check valve in the system? My guess is still the bulb; maybe a defective one; possibly a crack in the fuel line somewhere letting air in and killing the prime? (did you replace the whole line or just the bulb?) Either way, it doesn't sound normal to me; I don't re-prime my system all day once it's started for the day.

Let us know what the final fix was.

thanks honcho i will replace all the fuel lines this week. sometimes we over look the small thing right in front of us

Lets make sure I'm understanding your post. When you say after trolling a few hours, is that with the outboard or do you have the motor shut off and using a trolling motor? If you are not using the gas motor, are you leaving it down or trimming it up? If you are trimming it up, the carb bowls could be draining out.

There is also an anti-siphon valve at the gas tank, if someone hasn't taken it out and replaced with a standard barb fitting like many do. It is the bard fitting that fuel line to the motor goes on. The anti-siphon has a ball check valve inside that keeps the gas from flowing back into the tank. However, my first guess is if you have some other problem.

Take the engine cover off and pump the primer bulb until firm, then continue squeeze it, keeping pressure on the system while you inspect all hoses and fittings for a gas leak. If it's getting air and draining back into the tank, it will be leaking gas while you are holding pressure on the primer bulb.

My next check would be, after it has set for a couple of hours to take a couple of the brass plugs out of the bottom to the fuel bowls on the carbs and see if a couple ounces of gas comes out. If it does, then they are not emptying.

Then you need to check and make sure the fuel primer solenoid is working.