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Pulled impellor and it looked fine until I looked at the brass interior...it was worn and spinning in impellor. Repalced and all is good now...Thanks!

having same issue...RPM works fine, but MPH wont register. Mine was showing MPH until I did factory reset!

All, at slower speeds I am feeling some chatter in my rudder...any thoiughts on why and how to resolve?

Thanks to all for the help!!!

But why the bogging down...would the computer power down the engine if it thinks it is over heating? Not original. I recently bought boat and was told the impellor was replaced 80 hrs ago.

I checked water intake and both looked clear. How difficult is it to replace impeller and thermostat? Thanks for your response. FYI...alarm never went off so dont think it got too hot, but how do you...

My Indmar Assualt 325...2005 has been running great, but last night when I got the boat out in an emergency I ran the boat without properly warming the engine a short time at over 3000 rpm a mile or...