Mercury 2010 200 hp pro xs losing rpms

titaniumneck

Petty Officer 1st Class
Joined
Apr 11, 2016
Messages
209
1st motor would start off wot 5600 5800 rpms, the man stated it would drop rpms to about 4000,and alarm would sound. So yea, overheating, he told me he put it on muffs, and ran it with low pee pressure, then he says he continued to run it on muffs while squeezing the muffs onto the motor and it would pee stronger. ( yea I know, right) I changed his impeller and gaskets, ran it in tank, strong water pressure.
He picked boat up took it to the river, he said he ran it about 2 minutes, slowed down and the couldn't get the rpms back up passed 4000 rpms. But this time no overheating alarm.
Any ideas, wondering if he burnt something up when he ran it hot before. My impression of him is that he is slightly inpatient, Impulsive and ran it awhile while low water pressure.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,930
Have you actually ran it in water or just what your being told????
 
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