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Suzuki DF175hp drops speed, but rpm is high.

Greenland78

New member
Hello.

New user here.

I have question:
We have a 22foot boat Askeladden P66 Pilothouse with a Suzuki DF175hp.
Recently the engines speed drops but rpm is high, like 4500-5000rpm.
Prop is a steel 3x15x21R , and its okay.
It have tried an orther prop with same error.

What could it be?
 
Hello.

Sorry, english is my third language.
RPM is high 5000rpm but the travel speed drops to 8-13knots
Normally at 4100rpm the travel speed is at 21-22knots.

I´m going to check the fuel line, if its bended or pressed against something.
 
Check hull bottom for growth,excessive weight in boat, Water filled compartments,hull getting waterlogged, What are the maximum rpms you are getting now??
 
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