I Just got the 90 superjet with a 760 engine out of the shop for a top end rebuild. He said the bottom end was still good. He rejetted it to ( I can't read his writing very well, so i'll try my best to write it here so maybe someone can make sense of it)...1.5 N+S, 256 spring, 130 main, 70 pilot. Low 1 1/2 turns, high 2 turns. Again sorry if I butchered the numbers. Long story short, he said if anything it will be on the higher side of rich, and he would adjust it after the break in. I went out and broke in the engine the way he said, it ran very well. Then it died. One spark plug actually melted causing a piece of the electrode to close the cap. The other plug's electrode stayed inside the head when I took the plug out to inspect it. This thing makes me sad. I bought it in augest for 2K and since then i've put another 2k into it. I love it and hate the damn thing.
After a rebuild, I think it's dead
- Thread starter Galaitoto
- Start date
That sucks man, are you going to take it back to him to diagnose?
- Location
- Midland, Ontario, Canada
Are u running a pipe with your 760? That jetting sounds like it's for dual 38's and seems lean not rich if it's a 760 with a pipe. Stock sj woth pipe is 75/135
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Did you have the waterlines hooked up?