1976 Johnson 70 hp

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Wdavis1981

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Sep 15, 2013
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I've been trying to get this engine going that was sitting for about 5 years. Water pump was shot so I changed that. Starter went too. Changed that aswell. Droped it in the water and had it running for about 10 min til I dopped the warmup lever down and it stalled. Then we couldn't get it to fire back up. We check the spark plugs and there was a milky fluid on them. Any suggestions in what we need to do to solve this problem?
 
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Wdavis1981

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Sep 15, 2013
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Re: 1976 Johnson 70 hp

Thanks JB, but I don't see anything in that link to explain the cause of the milky substance that was on the plugs when we pulled them out
 
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lith74

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Jun 27, 2013
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Re: 1976 Johnson 70 hp

Unfortunately we have been through all of these steps. The motor seem to become partially hydrolocked and has a milky fluid like oil water mix coming out of the intake and on the spark plugs.
 
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Daviet

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Sep 24, 2008
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8,958
Re: 1976 Johnson 70 hp

If you pull the plugs and spin the engine over with the starter, do you get water out of the spark plug holes? Maybe you have a blown head gasket.
 
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Will Bark

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Aug 1, 2010
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1,470
Re: 1976 Johnson 70 hp

Agree with Daviet but also check the exhaust manifold gasket if it's not the head gasket.
 
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