Evinrude 115hp motor works fine then looses speed but revving increases

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gizmo1922

Cadet
Joined
Mar 25, 2012
Messages
6
I have a 115hp evinrude 2 stroke on my pontoon. I took it out today and at full throttle it worked fine for 30 seconds or so then the motor revved higher and lost a lot of speed, if I slow it back down it returns to normal, and then if I speed it back up same thing occurs.
I am new to this and would appreciate any thoughts.

Thank you
Josh
 
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Lone Duck

Master Chief Petty Officer
Joined
Oct 17, 2007
Messages
868
Re: Evinrude 115hp motor works fine then looses speed but revving increases

It sounds like at full throttle your prop is slipping. when you throttle down there is less torque so it doesn't slip . Pull prop and check rubber hub. probably it is separated . If so it will only get worse.
 
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gizmo1922

Cadet
Joined
Mar 25, 2012
Messages
6
Re: Evinrude 115hp motor works fine then looses speed but revving increases

Is that an easy fix?
 
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wired247

Lieutenant Commander
Joined
Oct 8, 2011
Messages
1,557
Re: Evinrude 115hp motor works fine then looses speed but revving increases

Do you have a prop with a replaceable bub system or is it a standard prop ? If its a standard prop you could probably get it rebuilt by a prop shop but it would cost as much as a new prop.
 
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gizmo1922

Cadet
Joined
Mar 25, 2012
Messages
6
Re: Evinrude 115hp motor works fine then looses speed but revving increases

wired247 said:
Do you have a prop with a replaceable bub system or is it a standard prop ? If its a standard prop you could probably get it rebuilt by a prop shop but it would cost as much as a new prop.
Click to expand...

Oh ok thank you for the help!
 
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emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: Evinrude 115hp motor works fine then looses speed but revving increases

Most modern props can be rehubbed by a local props shop. Rehubbing does not require a complete prop rebuild, so it is not as expensive.
 
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