I got this 2011 Speedster 150 with 54 hours on it last month.
When I checked the oil; it was clean but way over the full mark. I figured it was just because it was sitting on the trailer. But when I put it in the water, the oil still showed overfilled. I removed over a quart of oil from with my pump until it read just under the full line while sitting in the water. I also changed the plugs.
As a baseline, the boat used to idle between 2100 and 2400 when the motor was cool and around vary up and down between 1760 and 2100 when warmed up.
The strange thing through is that since I removed the overfilled oil, the idle is running even higher. When I first cranked it up after siphoning, it idled at around 2400. But after I ran it for an hour on the water, as I entered the no wake zone, it would not go under 2500rpm. Even after I got it back to the dock, it still ides at 2500.
This started me learning about the proper idle for this boat. It appears that it was never idling low enough, but the overfilling just masked the problem a bit.
I have read vacuum leak...perhaps?
But this boat does not appear to have vacuum hoses similar to my old toyota truck or honda CRX.
Where do I begin?
When I checked the oil; it was clean but way over the full mark. I figured it was just because it was sitting on the trailer. But when I put it in the water, the oil still showed overfilled. I removed over a quart of oil from with my pump until it read just under the full line while sitting in the water. I also changed the plugs.
As a baseline, the boat used to idle between 2100 and 2400 when the motor was cool and around vary up and down between 1760 and 2100 when warmed up.
The strange thing through is that since I removed the overfilled oil, the idle is running even higher. When I first cranked it up after siphoning, it idled at around 2400. But after I ran it for an hour on the water, as I entered the no wake zone, it would not go under 2500rpm. Even after I got it back to the dock, it still ides at 2500.
This started me learning about the proper idle for this boat. It appears that it was never idling low enough, but the overfilling just masked the problem a bit.
I have read vacuum leak...perhaps?
But this boat does not appear to have vacuum hoses similar to my old toyota truck or honda CRX.
Where do I begin?
