First problem we had was debris in the gas tank, so we replaced the main filler hose, and cleaned the tank out. Replaced the water separator, then we changed the fuel pump and filter, and then the spark plugs.

Also the reason why we changed the fuel pump was because it was out dated and cracked, we did NOT change the ball, seems OK.

Then we changed the water pump
We changed the water pump because we got the over heating alarm, and when we took the old one out, we could see it was badly needed, also... there are no thermostats, someone took them out, the guy said the boat didn't need them! should we add them? he said it was just something to get clogged up.

Besides the thermostats, what else to check to see why boat won't pick up speed.. could it be just the thermostats? could that possibly be the reason?

Last time we had it out, on high idle at the dock, water was coming out the pee good, and some water was coming out the exhaust, is that normal?

Problem: the motor sounds jittery , won't go up on plain, but idles OK, when cold it stalls on idle.
Hubby checked the spark, and got zapped all 6 times, so we think they are in working order.
What else to check, we'd like to get over the no/wake speed :)

Thanks so much in advance for any help given !
Jules

1. If the motor was designed with a thermostat than you should have one.
2. Yes it is okay for some water to come out of the exhaust.
3. Question did you change the spark plug?
4. could your motor be running to rich
5. can you get too full throttle, I only ask because ours was kinked
6. Last question is your propeller balanced; ours was not caused the motor to shake.

Also you could check the filters and replace them if needed, we also placed a inline gas filter, we are the proud owner of a 1975 Pennyan. She like to break down my I suggest Seatow or boat US they tow you in if you break down :D .