2004 4tec 155hp speed reduction around corners

[jamesdjs]

I have a question about a reduction of speed when the boat takes a corner.
When going straight I typically go 45- 47 mph but the speed reduces when taking a gradual corner to turn around.
1. Would this be caused by an excessive gap in the wear ring? I haven't measured it yet.
2. Or a reduction in the water intake.

Just curious if other people have the same symptoms.

 

[Coastiejoe]

Very common with boats. Has to do with friction and resistance. If you see the RPMs tdrop hen I am correct. Simply apply more throttle.

 

[devonte007]

Speed reduction while turning is normal in the 155 boats, and really all boats in general. Probably a bit less noticeable in boats with higher horsepower and dual engines. But in our 155's, it is what it is.

If you are concerned about your wear ring and/or cavitation a hole shot from standing still is your best test. The boat should hook up with no cavitation from a full throttle hole shot. If you have any cavitation then it is likely you need some work to the impeller, wear ring, or even carbon seal system.

 

[jamesdjs]

Thank for the reply. The boat takes off no problem. No cavitation.