I have a Yamaha F100 that has suddenly developed a annoying problem. When I tilt the engine all the way up to trailer the boat the unit will not power back down. You must release the pressure release valve to get the motor down. Once down the unit works fine. It does not leak down and...
I rebuilt this engine and seem to have some type of problem with the oil pump or something. After the engine sits for a day or so when it is cranked the low oil pressure alam sounds. THe oil seems to be draining from the pump and it has a hard time repriming and providing. This doesn't make...
I am rebuilding a Yamaha F100 and have a factory manual as well as a clymer manual on the engine. Both say to measure the connecting rod clearance using yellow color code bearings with plastigauge and then select the appropriate bearing combination from a chart. I did all of that and ordered...
I am replacing a blown headgasket on my Yamaha F100 - 1999 year. When I removed the old had it appeared to have some type of gasket material sprayed on the head surface. The Clymer manual on these 4-strokes does not mention anything about a gasket material. Should I use something or replace...
