Re: Gray foam(lots) from exhaust outlet 1957 Evinrude 10hp

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June 1, 2018 at 12:56 am #77180
chris-p
Participant

    Simply unburnt fuel/oil mix mixed into the spent cooling water. Very normal. Ensure your carb is set to optimal settings. We can help with that if need be. As stated, run her at 24:1 to ensure that your grandkids can use it after you!

    Changing your oil may help. I don’t own shares in BRP, but find that the XD series of oils have little to no smell, and show very little sheen on the water. I run XD 30 in all of my older motors at the recommended ratios.

    Do a decarbon as well with Seafoam or OMC Engine Tuner.