Evinrude 115 v4 - information please

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Deeps

Cadet
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Apr 6, 2002
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I just replaced the motor on my boat with an Evinrude 115 v4. It should be somewhere in the range of 1978-1982.<br /><br />I would like to know what fuel/oil ratio to use. I've also heard that some of these motors have a VRO (oil injection) system on them. Does that mean I don't add oil to the gas? How do I know if my motor has VRO?<br /><br />Also, what is the WOT RPM range? I've got a 13.75 X 17 prop on my 16' tri-hull and I have a feeling that I am a bit underpropped.<br /><br />Thanks
 
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wilde1j

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Apr 15, 2002
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Re: Evinrude 115 v4 - information please

You might try looking for an oil reserviour (say 2.5 gal) and checking owners manual. If no VRO, 50:1.<br /><br />WOT 5500-6000 RPM, try to prop for 5800 typical load.
 
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Deeps

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Re: Evinrude 115 v4 - information please

I'm getting 5000 rpms at WOT. Do you think I'm propped correctly?
 
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Dhadley

Supreme Mariner
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Feb 4, 2001
Messages
16,978
Re: Evinrude 115 v4 - information please

No. <br /><br />Try raising the motor if you have the type prop that will allow it. Whats the water pressure? Is the motor running correctly?<br /><br />Good luck!
 
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Deeps

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Apr 6, 2002
Messages
22
Re: Evinrude 115 v4 - information please

The motor runs great. When running at WOT (5000 rpms), it is screaming. However, I do believe that it is sitting quite low in the water. The top exaust holes are on the water line.
 
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