IDLE RPM

[bream_master]

"Hi to all,just wonderind what

"Hi to all,just wonderind whats the best way to check R.P.M AT IDLE.I have a digital tachometer and normally check R.P.Ms with the ear muffs on.Would putting motor in a tub of water and then checking RPM'S give you a different reading.....CHEERS"

 

[cehmass]

"yes , with the lower unit in

"yes , with the lower unit in the water it will read a bit lower,remember muffs are only good for flushing.the engine must be in its element,
thats what it is designed for ,not running in the back yard on a hose."

 

[bream_master]

"Thanks for that,my motor is a

"Thanks for that,my motor is a 35hp model 35el78r,on the muffs it idles at around 960 to 1000 rpms,is this normal and by submerging lower unit what should rpms read.....CHEERS"

 

[vics]

It'll be interesting to he

It'll be interesting to hear if you find a measurable difference between running on muffs and running in a tub or even on the back of the boat.

 

[joereeves]

"On a flushette, setting the i

"On a flushette, setting the idle at 1000 for a 20" shaft engine and 1200 for a 25" shaft engine has always worked out fine for me. In the water, the rpm, due to back pressure, would drop to a normal idle rpm.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay store at:

http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store"

 

[bream_master]

"Thanks heaps for all your res

"Thanks heaps for all your responses,after doing a check again at idle with the muffs on,it registered at 1000rpms,when i took boat out to the lake,it dropped down to 930 or 940 rpms,so at that point i increased rpms to 1100, and now she purrrs like a kitten.Once again thanks heaps for all your feed back........CHEERS

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