New boat/motor. Yamaha 250hp 0x66 wont run

Captaincrisp

Petty Officer 2nd Class
Joined
May 28, 2016
Messages
128
Hey there! I just bought a new (old) boat a 22ft aluminum starcraft cudy cabin. It has a yamaha 250oc66 hanging off the back. It starts like a car but soon dies about 30 seconds or the first time then after a trys it will idle for less then a few seconds. The clear fuel bowl under cowel is full to the brim. Pumping bulb makes no diffrence. I noticed under the cowel on the very bottom of moter ( right hand side in boat )there is a fuel line that has a switch with a red tab that has a retainer spring keeping it in the off position. I havent touched that yet. But would like to know what its for. I will replace some filters and maybe check out o2 sensor and soak it alough i havent found any instructions for how to on that or low pressure fuel pumps and diagnoising them. I will buy a service manual soon i guess. Thx guys if you can give me any hints or nuges in the right direction .
 

Captaincrisp

Petty Officer 2nd Class
Joined
May 28, 2016
Messages
128
Oh and it dies like a key has been turned off most the time. Thx new motor no book really want to go slaming salmon in this thing
 
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