Running motor with earmuffs on

[11craigt]

Just put new power packs, plugs and wires on my 115 Evinrude (1983). Running it in gear with some throttle (upto 4000 rpm)for s short time to make sure everything is working the motor makes a kind of garbling exhaust noise...not a precision "prrr". Is that just the way it is being a 2-stroke with no exhaust restriction? Any reply appreciated. Have a great weekend!

 

[walleyehed]

Re: Running motor with earmuffs on

Never run over 2000RPM on the muffs. You can have a run-away, put a rod through the side or maybe even a hole in a piston.<br />There really is nothing you can adjust on the muffs, so there is no reason to run any RPM other than Idle or slightly above.

 

[11craigt]

Re: Running motor with earmuffs on

Thanks for the input. Won't be doing that again. What about the roar of the exhaust though? It somewhat is a little rat-tat-tat like? Not smoothe and seamless?

 

[walleyehed]

Re: Running motor with earmuffs on

Completely normal with no back-pressure...<br />It smooths out in the water where it has the designed back pressure to scavenge properly.

 

[R.Johnson]

Re: Running motor with earmuffs on

If you want to hear noise! A V-6 Merc running on a dyno is hard to beat.

 

[11craigt]

Re: Running motor with earmuffs on

Hey cool. Thanks guys, much appreciated. Kinda thought so....but I am still an expert novice. Have great weekend.