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    Smoke from Valve Cover Vent. Mercruiser 165, I/O

    Well I have a little smoke that comes from the valve vent cover when I run the engine at high RPMs. If it is blow by, should I be worried about water getting into the oil at the same time? Extensive checks on the oil doesn't indicate I have water in the oil but didn't know if i should be...
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    Milky Oil?

    Alright still working on this old Mercruiser engine. 1972 Mercruiser 165hp, inline 6, I/O. Pulled the dipstick to check the oil today, and it looks like Choc Milk. Nice blend of dark and lighter oil. I got this boat this year from a family member who hadn't been using it, So I recently...
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    72 Mercruiser 165hp Manifold

    Re: 72 Mercruiser 165hp Manifold Ok I've got a couple pictures here. The hole seems to be rust related and has appeared on the top of the manifold. When the water comes up, it comes to a boil then is smoking off. I've got a little bit of smoke coming from the valve cover vent but that's...
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    72 Mercruiser 165hp Manifold

    Hey everyone. Have a hole that developed on the top of my manifold and now water Boils out of it. Is there an easy fix for this, or am i better off getting a new manifold? If so; can someone help with the proper manifold or part number I need? 1972 mercruiser 165, I/O inline 6, GM Block.
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    Smoke from Valve Cover.

    Had the boat out for a little fishing and just an enjoyable time. Cruising down the river and I smell smoke. Not (On fire) type, just know that something is smoking. Opened the engine compartment and smoke was steaming out of the Valve cover vent on top. Only smoked when I was cruising at...
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    Lower unit oil. Wrong?

    Dropped off my boat with a buddy who does frequent lubes and oil changes on about everything. He said he'd change the lube on the lower unit of my 72 mercruiser 165 i/o. I came back to find (instead) of pennzoil marine gear lube, he used pennzoil marine premium plus outboard oil. Will this...
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    Lubing outdrive grease points. Mercruiser Alpha one.

    Got the boat almost ready to go for the summers use, I want to hit all the grease points on the outdrive and change out the lower unit lube/oil. #1. What type of grease to use on these grease points? #2. Can I fill the lower-units fluid from the top if I allow it the time to drain into the...
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    Water leak on transom plate. Mercruiser 165 inline 6

    Well decided to take the boat out today and give it a once over. Everything appeared fine until an hour later, I had a nice drizzle of water coming in. Almost filled the engine compartment. I have an 72, 18' MFG speed boat with a Mercruiser 165hp, inline 6 I/O. This leak was just above the...
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    Mercruiser Manifold Riser Drain size

    Does anyone know the size of the drain plug for the Riser on the old Mercruiser inline 6 manifolds? Was going to use my 3/8 tap to clean it out, but the hole seems too large for the tap. I was lead to believe it's 3/8s just like the drain on the bottom of the manifold itself, But I'm not so...
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    No power to my dash panel or starter

    Working to restore my families old MFG Boat. While doing some engine work, i reached up to turn the key. Note: (at this point, all the lights on the dash usually light up). I turn the key, the engine clicks once then nothing. I look down to discover none of the lights are working on the dash...
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    72 Mercruiser 165 inline 6 engine clicked once then nothing

    Hi all, I've been working on our old family boat. Unfortunately sitting for about 10 years. Been going through trying to replace some of the minors on it, Distro cap, plugs, oil and filter, and battery is as far as I've gone. Well I get it all put back together, put the new batter on, went to...
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    1972 Mercruiser 165 inline 6 manifold plugs

    Hello, I recently acquired my families old ski boat. A 1972 16' MFG with a Mercruiser 165hp inline 6. I was beginning the work around to change the oil, spark plugs and maybe fuel filter if it needs. I was given 3 plugs that i'm told were from the winterizing of the motor. 2 that were the same...
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