I posted last week about back preasure being the culprit because the boat starts fine when its on the trailer with a garden hose hooked to it, but at the lake its a different story. The boat is an 87 Sunsport. It fires right up when I first get to the lake. Boat runs great, idle, WOT, cruise, whatever. Turn the boat off, sit for 30 seconds or less, fires right up. Sit for more than that, I have to put in neutral and the throttle to wide open and crank for about 10 seconds. Then it fires, runs fine.
The carb is a edelbrock 600 cfm marine, I know its not the stock carb. I rebuilt the carb, new needles and seats, set the floats to spec.
My question is, Could this be something other than the carb? I have been reading the archives and seems that a lot of old supra's had the same problem and fixed it by changing out the starter. I dont think it cranks much different on the lake versus the trailer but I could be wrong.
Does the fact that it starts with the throttle at wide open rule out the starter? I just don't think its the carb since the rebuild and the fact that it runs perfect other than the starting issue.
I think the difference from the trailer to the lake is the temp diff. under the engine cover. If not temp, its the angle that the carb sits from the boat sitting in the water.
Temp. difference makes me ponder the whole starter idea. The angle of the carb just does not make sense to me. I know Salty had said about getting a carb wedge but I just can't believe that supra would make a boat that would be so hard to start from the factory. Maybe I need to seet the floats deeper? Any ideas? Thanks again for all the help.