wajetter
Jet Boat Lover
- Messages
- 81
- Reaction score
- 29
- Points
- 67
- Boat Make
- Yamaha
- Year
- 2006
- Boat Model
- AR
- Boat Length
- 23
Since purchasing the boat, I been dealing with oil consumption on both engines. Measured every which way - cold on trailer , on water hot, on water cold. Had to consistently add up to half a cup after each use, a mere 2 hours.
So, rebuilt both engines this spring:
- new WSM pistons and rings
- new chains
- new valves and their seals
- checked (plastigauge) crank and rod bearings and replaced crank bearings out of spec (a couple were too small). Rod bearings were all in spec.
- had ECUs repaired (apparently water damage had some injector issues)
- all cylinders measured 165-170 cold and throttle open.
To my dismay, seeing absolutely zero improvement in oil consumption.
What can be some other reason for oil consumption? Usual culprits were addressed: pistons and valve seals.
So, rebuilt both engines this spring:
- new WSM pistons and rings
- new chains
- new valves and their seals
- checked (plastigauge) crank and rod bearings and replaced crank bearings out of spec (a couple were too small). Rod bearings were all in spec.
- had ECUs repaired (apparently water damage had some injector issues)
- all cylinders measured 165-170 cold and throttle open.
To my dismay, seeing absolutely zero improvement in oil consumption.
What can be some other reason for oil consumption? Usual culprits were addressed: pistons and valve seals.