Phil Masciantonio
New Member
- Jul 17, 2021
- 2
- Boat Info
- 2016 SPX 190, 4.3L Mercruiser I/O
- Engines
- 4.3 Mercruiser
Hi All,
First time posting here. Appreciate any possible insight.
Over the last two seasons, I have had an unexplainable power loss to the engine. I can only push the boat to about 40% throttle. The boat runs well up to that point, but eventually, there will be a "stutter" in the engine and I have to back down to neutral, sit for a few seconds, and then I can start moving again. It will depend on how much additional weight is on board, but this generally happens around 3.5k rpms with our regular load on board. I will run at 3.5k for a few minutes, and then the stutter begins.
My mechanic and I have tried a few things with no success. Spark plugs were changed, the distributor cap was replaced, and we hooked up an external gas tank to eliminate a gas tank or fuel line issue. The boat is winterized once a year and at that time the oil and filter are changed as well.
Has anyone heard of an issue like this and have any recommendations? Please feel free to ask questions if I didn't provide enough info. Thanks in advance!
First time posting here. Appreciate any possible insight.
Over the last two seasons, I have had an unexplainable power loss to the engine. I can only push the boat to about 40% throttle. The boat runs well up to that point, but eventually, there will be a "stutter" in the engine and I have to back down to neutral, sit for a few seconds, and then I can start moving again. It will depend on how much additional weight is on board, but this generally happens around 3.5k rpms with our regular load on board. I will run at 3.5k for a few minutes, and then the stutter begins.
My mechanic and I have tried a few things with no success. Spark plugs were changed, the distributor cap was replaced, and we hooked up an external gas tank to eliminate a gas tank or fuel line issue. The boat is winterized once a year and at that time the oil and filter are changed as well.
Has anyone heard of an issue like this and have any recommendations? Please feel free to ask questions if I didn't provide enough info. Thanks in advance!