Max rpm?

[Apummill]

Anyone know what the recommended max rpm for a 1980 mercury 150 is? I'm wanting to get a ssh prop but need to know what rpm I need to keep my outboard under. My tech works but the boat is a 1990 and motor is a 1980 so I don't know if the guage red line would apply the same way

 

[Chris1956]

The tachometers for Mercs are pretty universal. Your's probably will read correctly, provided it is set correctly and wired correctly. They usually don't have a red line on them.

Recommended WOT range is 5000-5500 RPM, for non-high performance models, likely like yours.

 

[Apummill]

Ok thanks

 

[TD_Maker]

Those two-stroke engines are happiest when turning near max RPM's. I agree with Mr. Chris 1956 Under 5500 is where you want to be.