Hi All,
I'm having serious problems which I'll outline below.
I was driving the boat for about 1hr. Everything was fine. Docked for awhile. On the return trip home, I had to go through a 9mph channel for 10 minutes. Someone was stopped in the center, so I wandered to the very sideline of the channel. After this, gradually accelerated to full throttle for approx 2min. Ran great. As I smoothly backed off the throttle, it was reducing power at a faster rate than me backing off throttle. I then brought it to idle, and tried to accelerate back up. It didnt want to. It only went to 4100ish rpms and sounded rough. Opening the engine bay, there was a very loud rattle, which increased with rpm. The sluggishness felt like not all cylinders were firing, or bad plugs etc, but there was the bad metallic rattle/banging.
I drove at about 2000rpms for 5 min to get to a pull out, and now the boat is on its way to a shop to check it out.
From the noise, I would guess that it is a spun bearing, but have never heard one personally before, this is just from youtube.
I had no alarms, both oil tanks were at full. Before it happened the boat was running great and very smooth, and was running 38mph with 7 on board. Some smoke for 2 min at startup, but none after it's warm. I always stay on top of service each year, so it isn't from neglect. Are these engines prone to throwing a rod or spinning a bearing?
Could sucking something into the pump cause a similar vibration / rattle / unbalanced noise?
Only other problem I had recently was starter was spinning and not popping up to the flywheel. A whack from a hammer fixed that. No problems since.
I'm having serious problems which I'll outline below.
I was driving the boat for about 1hr. Everything was fine. Docked for awhile. On the return trip home, I had to go through a 9mph channel for 10 minutes. Someone was stopped in the center, so I wandered to the very sideline of the channel. After this, gradually accelerated to full throttle for approx 2min. Ran great. As I smoothly backed off the throttle, it was reducing power at a faster rate than me backing off throttle. I then brought it to idle, and tried to accelerate back up. It didnt want to. It only went to 4100ish rpms and sounded rough. Opening the engine bay, there was a very loud rattle, which increased with rpm. The sluggishness felt like not all cylinders were firing, or bad plugs etc, but there was the bad metallic rattle/banging.
I drove at about 2000rpms for 5 min to get to a pull out, and now the boat is on its way to a shop to check it out.
From the noise, I would guess that it is a spun bearing, but have never heard one personally before, this is just from youtube.
I had no alarms, both oil tanks were at full. Before it happened the boat was running great and very smooth, and was running 38mph with 7 on board. Some smoke for 2 min at startup, but none after it's warm. I always stay on top of service each year, so it isn't from neglect. Are these engines prone to throwing a rod or spinning a bearing?
Could sucking something into the pump cause a similar vibration / rattle / unbalanced noise?
Only other problem I had recently was starter was spinning and not popping up to the flywheel. A whack from a hammer fixed that. No problems since.
