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    Outdrive work stand

    What do you use to support your outdrive while tightening the big retainers. I have done several reseals using a vise on the skeg but figure one day I may break one off while torqueing that retainer behind the u-joint.
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    Mercruiser 1 outdrive mounting gaskets

    Can a Sierra 2619-1 gasket be used for a 1974 Mercruiser 1 outdrive and bell housing? I have been using Sierra round top gaskets for many years . A local marine parts place sold me one(2619-1) and said it is ok. I just don't want to be replacing the yoke,u-joints and upper oil seals if it is wrong.
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    Alpha upper/Mercruiser 1 lower

    What would the most likely cause be for the outdrive to intermittently get stuck in forward? This is happening with the boat in water. It usually frees by quickly shifting farther forward and back towards neutral while idling. At times it has locked at the dock. With the engine off ,the lower...
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    Barr riser with stainless insert

    Had the wrong riser sent to me for a Mercruiser 165 straight 6. I had ordered a solid cast Barr riser but received a Barr part number 20 60426 which has a stainless insert in the outgoing side. It is meant for the straight 6. Does anyone have experience with this? Is it a good riser or...
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    Sierra , Barr, osco manifolds

    I have to replace the exhaust on a Mercruiser 165(actually a Chevy 250 for engine swap) . I used the old Osco exhaust to get another boat going. Did Osco go out of business or sell to someone else? Which manifolds and risers are better quality? Sierra or Barr?
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    1971 Formula with a Mercruiser 165(straight 6). Damper timing mark off.

    Picked up an old boat for parts I need . Instead of stripping it for the parts I replaced the head with one I had . Ok...I'm a glutton for punishment. The old one had burnt valves recessed in the head. 2 cylinders real bad. It now has good compression between 155 and 165. I attempted the timing...
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    Outdrive mounting gasket

    I'm helping a neighbor install his Alpha 1 gen 1 outdrive to a 1974 Mercruiser 1 bell housing. I'm not sure if the older style round top gasket or the square top Alpha 1 should be used. Which gasket should be used?
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    Low compression

    I picked up an old 1971 Formula with a Mercruiser 165 for free from a guy on Craigslist. There are a bunch of parts I could use off of it. The fresh water cooling system was a good find. The hull is in good shape and it would be a shame to junk it without trying to fix the engine. Compression is...
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    Mercruiser 150 inline 6 . 235 ci

    I think I have a fuel problem. Boat gets out of the hole fine and then attains wot of 3700 , runs great for 12 seconds and then bogs to 3200 at wot and maintains that rpm . (gauge reads low by approx 200 rpm when compared to more accurate gauge). Idle for a minute and try the same thing with...
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    Mercruiser 1-pre Alpha reseal

    Came across a used drive hopefully for a backup .I have the upper driveshaft housing apart for a reseal. All good so far except the bearing cup in the top cap is loose and slides out . I found it when it fell out while removing the top cover. Do I now have to replace the bearing cup,roller...
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    Water hose & bellows replacement

    I'm replacing the bellows and water hose on my 1971 International. It has a Mercruiser 165 straight 6. The hose purchased came in a 49" length and must be cut. I can't find the length in the service manual. Can anyone tell me what length the hose needs to be between the bell and gimbal...
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    MC-1 bellows replacement Mercruiser 165

    I will be replacing all bellows on a MC-1 Mercruiser 165 inline 6 . The boat is a 1971. Bell housing was replaced 5 years ago. It appears the drive shaft bellows I need have no ridge(judging by pictures I've seen on the net of 1972 and older) . How do you tell when they are on all the way? Any...
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    Mercruiser 165 / chevy 250

    Last year picked up an engine in a hurry sold as a allegedly rebuilt Mercruiser 165. turned out to be a 235 ci engine. I swapped engines to get the season in. Propped down,dealt with some overheating issues and made it through the entire boating season April through December. Not happy with the...
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    Mercruiser 150 overheat

    I was hoping to never have to place a post for overheating again. But my inline 6 is overheating on plane and the water is still cold in the bay. It gets past 160 after about a minute. Add about 3 min to that and it's getting near 180. Come off plane(didn't want to keep going) and it takes a...
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    Sierra

    Just noticed Sierra exhaust manifolds when pricing. Getting harder to find certain Osco parts for Mercruiser. Does anyone know if Osco sold to Sierra or if Sierra is marketing some of Osco's exhaust manifolds/risers? Just curious here. I doubted Sierra is casting their own.
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    Mercruiser 150 temp sender

    It's finally warm enough to start the engine on the floor before putting it in boat. It's a Mercruiser 150 straight 6. Does anyone know if there is a chart available plotting resistance vs temperature for the temp sender? This way I can leave a ohmmeter on it while running.
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    Mercruiser 150

    Oh boy. Looking over the used engine I bought and now see a big mistake I made. At least it came with exhaust which has never seen h20 .Owner sold it as a 250 ci engine. I noticed it had flat top pistons today. It's a Chevy 230. Not a 250. I'll have to double check the stroke. My boat was built...
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    Engine break in

    I will be hopefully starting up my engine in the next few weeks. Mercruiser 165 straight 6 and breaking in the cam. Can anyone tell me if there is a break in oil or additive that needs to be used? Should I use the straight 30w or the newer merc multi weight? The engine has sat for 10 years after...
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    Mercruiser 165 straight 6

    I picked up an old engine that was lying under a tarp in someones yard for the past 4 months. Prior it was allegedly in a garage(surface rust in some areas has me doubting).According to the owner his father had it rebuilt and it was never run. Sat for 10 years.It never made it in the boat due...
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    Max overbore

    I found a possible replacement for my cracked block. It is for a Mercruiser 165 straight 6. The machinist tells me he would have to sleeve cylinder 1 and bore the others to .040. Is this ok? I think Mercruiser calls for .030 max. What problems could this cause? It is raw water cooled engine...
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