High rpm low on cooling

clifffish

Recruit
Joined
May 1, 2007
Messages
1
I just replaced my 1989 200 Yamaha with a 1993 200 Yamaha and at low rpm's it runs fine but when I run over 3000 RPM it overtemps???
I have changed thermostats and water pump, cleaned out the water jackit on 1,3,5, side of the engine. It got a little better after that but it still overheats it just takes longer to happen HELP.
 
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