7.5 sea king wont run with hood on

[rangerbassman]

I picked up a ROUGH Sea King 7.5 at a yard sale for next to nothing. I got her in a barrell and went to pulling. after my right arm nearly fell off I noticed a groung wire from the powerhead to the midsection had been cut and twisted back together. So I untwisted it and took it apart. On the third pull it fired. I unchocked it and it started on the next pull. I let it warm up at a fas idle and then I started decreasing the throttle adjusting the air mixture as I went down. I got it down to where it idled very low and smooth. I put it in gear and gassed on it and it ran like a dream. I was thinking that I had really done something until I put the cowl back on and the engine died. I started it back up without the cowl and gave it some throttle and reinstalled the cowl and It still choked it out. I dont know if there is supose to be any type of air box on the inlet side of the carb, but it doesnt have one. I think it may be sucking exhaust. Can someone shed some light on this for me? Thanks, Chris

 

[eurolarva]

Re: 7.5 sea king wont run with hood on

Sure sounds like exhaust gaskets getting back into the air intake. There is no air filter on these motors. If you have a boat to try it on see if it improves. With the motor moving it should leave most of the exhaust behind. Maybe try a high grade outboard oil with TCW3. Some advertise less smoke. If problem continues chances are the exhaust gaskets on the side and the ones under the powerhead will have to be replaced. The job is not hard however finding the gaskets can be a challange.