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2004 40hp Merc 2-stroke RPMs higher than normal
sbk440
#1 Print Post
Posted on 07/25/21 - 3:37 PM
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Today I jumped on my whaler 130 sport, started up the 2-stroke (3 cylinder) and left as normal. When I hit WOT, my RPMs were showing off the chart around 6500 with 5500 being normal. I gps tested my speed which was the same as always, the motor didn’t sound different at all. I also checked the prop for damage and there was none, there was also no play when I tried to manually move it. Any thoughts?

 
sbk440
#2 Print Post
Posted on 07/25/21 - 5:10 PM
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Must be a bad Tachometer, went for a spin tonight and it showed normal. I noticed this afternoon when the boat was off, the needle was at 1200, when I shut it down tonight, it was around 800.

 
Phil T
#3 Print Post
Posted on 07/26/21 - 9:05 AM
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When the tach starts to act wonky, could be a failing rectifier.



1992 Outrage 17 I
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sbk440
#4 Print Post
Posted on 07/26/21 - 3:39 PM
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Oh goody, something else to be concerned about!

 
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