firedoctor
New member
"HI Back to my next problem wi
"HI Back to my next problem with the Yamaha 90 1987 2 str. After putting it back together,(did not overhaul the actual motor) only the head gasket etc replace after servicing, I now get a lot of sump compression and I get blow out through the lower drive shaft oil seals, quite a big pahfooosttt every now and again especialy when the revs are brought up. This motor had been standing for 2 years, and looks like the rings have never been done. By my reconing the rings are stuck, I am looking down the path that I will have to do the rings and bigends etc. Is there anything else that can cause this. The motor starts easy as, and other wise seems to run well. Many thanks 4 all the other advise. Cheers lawrence"
"HI Back to my next problem with the Yamaha 90 1987 2 str. After putting it back together,(did not overhaul the actual motor) only the head gasket etc replace after servicing, I now get a lot of sump compression and I get blow out through the lower drive shaft oil seals, quite a big pahfooosttt every now and again especialy when the revs are brought up. This motor had been standing for 2 years, and looks like the rings have never been done. By my reconing the rings are stuck, I am looking down the path that I will have to do the rings and bigends etc. Is there anything else that can cause this. The motor starts easy as, and other wise seems to run well. Many thanks 4 all the other advise. Cheers lawrence"