what is max allowable rpm's on a '72 evinrude 125

[John Bett]

Hello, I run a '72 Evinrude 125 hp motor on an 18' fiberglass Kona boat. The tag on the mounting bracket indicates RPM 4500-5500. I thought I saw somewhere where someone said it was ok to run up to 6000 RPM. Is this true?\Thanks

 

[CATransplant]

Re: what is max allowable rpm's on a '72 evinrude 125

I wouldn't do it, frankly. You'll get to keep your outboard longer if you stick to the factory limits.

 

[Cricket Too]

Re: what is max allowable rpm's on a '72 evinrude 125

The closer you are to 6000 WOT the better. Anything under 5500 WOT and your lugging the engine. 2 strokes love to run WOT all day, it won't hurt them, not like 4 strokes. I run all of mine at 5800 constantly every where I go.

 

[walleyehed]

Re: what is max allowable rpm's on a '72 evinrude 125

Cricket is correct...On todays fuel, 6000 RPM is a good thing.<br />When the engine was built 33 years ago, our fuel was 500% better than it is today...coking will be considerably less if setup for 5800-6000.<br />Run fresh 87 octane and a good TC-W3 oil and have fun!

 

[John Bett]

Re: what is max allowable rpm's on a '72 evinrude 125

Thanks, Guys!<br />Advice is well noted!,<br />J.

 

[ledgefinder]

Re: what is max allowable rpm's on a '72 evinrude 125

My understanding is that the first real limit is the stock (metal) reeds, which get iffy with sustained cruise above 6500.