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  1. #1

    Default 1999 Evinrude 70hp 4 Stroke problem

    I am the original owner of this 70 4-stroke Evinrude. For the last few years, have not been able to use the motor that much due to power problems.

    First, when I put muffs on the motor and run it, it seems to run fine, but when I actually put the boat in the water, it does not have very much power at all. Ocassionally it would take off with full power only to revert back to a "bogged-down" feel with no power.

    I have put it in the shop a couple of times and they never really have been able to identify and problems other than the last time I was told it needed a new fuel pump. Around $800 later, the problem is no better.

    Second, I have now noticed that the more the engine is run, the higher the oil level gets. In fact, it seems like gas is getting mixed into the oil.

    I am desperate for ideas as t what all I may have going on here. I have no idea where to start....

  2. #2
    Join Date
    Nov 2008
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    Posts
    244

    Default Re: 1999 Evinrude 70 4 Stroke problem

    what is the compression on the cylinder(s)?
    please do compression test.

  3. #3

    Default Re: 1999 Evinrude 70 4 Stroke problem

    Unfortunately, I have no way to test that right now.

  4. #4
    Join Date
    Nov 2008
    Location
    Posts
    244

    Default Re: 1999 Evinrude 70 4 Stroke problem

    that is the first thing i would be doing to make sure u have compression

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