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Recent content by Agarico

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    1977 Mercruiser 165 Water in Cylinder #6

    From doing some research, mercruiser put out a TSB on this engine stating that due to poor water flow in the manifold they can crack due to heat. The fix is a reverse flow kit to send water backwards through the manifold and then through a hose to the riser. I will have to do more research...
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    1977 Mercruiser 165 Water in Cylinder #6

    Yeah so I went ahead and just pulled the manifold entirely and put it on the floor. Poured water into the cooling jackets and even after a few minutes it had drained down into the exhaust portion. I already have a new manifold and riser elbow on order. Manifold is cracked inside somewhere...
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    1977 Mercruiser 165 Water in Cylinder #6

    Id say 120-130 is decent compression on a 50 year old engine
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    1977 Mercruiser 165 Water in Cylinder #6

    Because I didn't want to spend a lot of money buying a boat 🤷‍♂️ Guy said it ran fine and everything worked on it. (as one does when selling a boat) My day job is working on cars so figured if anything is wrong I could fix it myself. Tried to do my due diligence when purchasing but missed the...
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    1977 Mercruiser 165 Water in Cylinder #6

    I pulled the exhaust elbow off of the manifold and can see standing water inside the manifold. I think im going to order a new elbow riser and gasket and see if thats my issue. Definitely need to get the milky oil out of the motor too!
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    1977 Mercruiser 165 Water in Cylinder #6

    A Little update: I got the exhuast elbow off of the manifold and there is standing water inside the exhaust manifold. really don't know my next course of action any help would be appreciated. Should I replace the riser gasket and see if that fixes it? Should I pull the manifold and just...
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    1977 Mercruiser 165 Water in Cylinder #6

    Hi all, new to boating and purchased my first boat (1977 Invader Executive 18ft) This boat has the Mercruiser 165 Straight 6 engine (Chevy 250) with a pre alpha lower unit. Anyways, brought it home and found it to have water in the oil, however it does run decent. When hooking up the muffs and...
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