jhotch
Seaman Apprentice
- Joined
- Jul 4, 2020
- Messages
- 35
Hi all my boys have gone through this 1990 Johnson 70 to put behind their pandemic project. restoring a Boston Whaler Mischief 15 we found abandoned in the woods at a home remodel project. It starts right up. Replaced spark plugs, starter, selenoid, and tge previous owner of the motor got rid of the vro with an electric pump so we put a manual fuel pump on it. First time in the water, it opened right up then after 30 seconds it began to surge. opened the cowling and the face plate of the new pump had come loose and gas was spilling out. tightened it back on but it was still surging and continued to get worse.
Got back and after research I found out that they came straight out of the pulse port with a reqular 5/16 gas fitting. Also they were running 1/4 inch line and 3/8 fuel line variously throught the fuel system. Got a pulse limiter and rebuilt the fuel harness with 5/16 to the filter and then to the pump. Then 5/16 from the pump to the first tee and 3/16 from there on to the carbs. Now it runs at wot for about 60 seconds and then starts surging again. Any ideas? new to posting on these forums, but would appreciate some help!
Got back and after research I found out that they came straight out of the pulse port with a reqular 5/16 gas fitting. Also they were running 1/4 inch line and 3/8 fuel line variously throught the fuel system. Got a pulse limiter and rebuilt the fuel harness with 5/16 to the filter and then to the pump. Then 5/16 from the pump to the first tee and 3/16 from there on to the carbs. Now it runs at wot for about 60 seconds and then starts surging again. Any ideas? new to posting on these forums, but would appreciate some help!