Big Daddy
Active Member
- Messages
- 9
- Reaction score
- 0
- Points
- 40
- Boat Make
- Yamaha
- Year
- 1999
- Boat Model
- LS
- Boat Length
- 21
I took my jet boat out for its first run of the season last weekend after storing it for the winter. Boat started fine and ran great for hours... all at low speed. After dinner decided to take a long cruise before taking her home, again ran fine at higher speeds for approximately 45 mins, boat performed very well. Suddenly the port engine stalled while at approximately 3/4 throttle. It would start up fine and continue to run well at low speeds but as soon as I would accelerate to come up on plane... engine would run on plane for about 20 seconds and then stall. I continued to start the engine, bring the boat on plane for 20 seconds, have it stall, start again etc. over and over til we got back to our dock. Battery and plugs were brand new before this voyage and boat was winterized. Starboard engine continues to run fine. I did notice a small amount of oil in the bilge the following day and a compression test on the motor showed 2 cylinders reading 118 psi while the center cylinder read only 88 psi. Any thoughts or ideas on what to try next?? Thanks