christo555
Seaman Apprentice
- Joined
- Aug 12, 2010
- Messages
- 49
hello you out there,
well, i'm still trying to fix the same problem, namely motor starts easy on first try but dies in 30 to 70 seconds. can repeat this situation 4 or 5 times with motor running shorter or longer times but never more than 90 seconds.
so, per advice i have gotten carb rebuild kits from i boats(sierra # 18-7037) and from napa(same number) and had a boat repair guy tell me the same kit number, but none of the kits give me the right size air horn and to block gaskets. and worse, the float needle and seats are of such a size(longer) that you would have to bend the tab on the float to a 45 degree angle wrt the float to get the right float shutoff level.
i've tried just cleaning the carbs and when installed i get the same above problem.
during the say 60 seconds the motor is running, i've looked into the carb and can see that there is a gas puddle behind the throttle valve. puddle meaning maybe 1/16 inch deep at bottom of the throat.
i think that means that the engine is being flooded with gas, but when i open the throttle to the 50 to 100% open it doesn't keep the engine running much longer.
the seats in the carb were like a rubber plug with a hole in the middle that the needle would seal. the new seats are all metal.
the carb kits, all the same number 18-7037, have either metal needles or rubber tipped needles.
the three carbs are tillotson wb8d.
any ideas???
getting discouraged,
christo555
well, i'm still trying to fix the same problem, namely motor starts easy on first try but dies in 30 to 70 seconds. can repeat this situation 4 or 5 times with motor running shorter or longer times but never more than 90 seconds.
so, per advice i have gotten carb rebuild kits from i boats(sierra # 18-7037) and from napa(same number) and had a boat repair guy tell me the same kit number, but none of the kits give me the right size air horn and to block gaskets. and worse, the float needle and seats are of such a size(longer) that you would have to bend the tab on the float to a 45 degree angle wrt the float to get the right float shutoff level.
i've tried just cleaning the carbs and when installed i get the same above problem.
during the say 60 seconds the motor is running, i've looked into the carb and can see that there is a gas puddle behind the throttle valve. puddle meaning maybe 1/16 inch deep at bottom of the throat.
i think that means that the engine is being flooded with gas, but when i open the throttle to the 50 to 100% open it doesn't keep the engine running much longer.
the seats in the carb were like a rubber plug with a hole in the middle that the needle would seal. the new seats are all metal.
the carb kits, all the same number 18-7037, have either metal needles or rubber tipped needles.
the three carbs are tillotson wb8d.
any ideas???
getting discouraged,
christo555
