Recent content by Allmand

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    Trying to identify lower unit and correct HUB

    Hello, I have a 1968 pre-alpha drive. I know the upper is pre-alpha and the lower WAS pre-alpha before I had it rebuilt. But the mechanic put on a different rebuilt lower because he said mine wasnt worth fixing. So now not sure about the lower. It has been freshly painted so I cannot see any...
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    How to tell if I have a Auto or Marine Carb???

    Hello again, I have a 1968 GM 250ci l6 160hp. I know I need to rebuild the carb, but after reading other threads its very important to have a marine carb. I am not sure if this is a marine carb or not. The boat is older than me and I have only had it for 2 years. Before I go to rebuild, I...
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    Alternator Keeps Seizing!

    Hello again, I have a 1968 GM 250ci 160hp l6 with Mercruiser M drive. I keep having issues with the alternator seizing up, getting the belt hot, causing it to burn the rubber which in turns is causing the belt to slip and the water circulation pump to not circulate which ultimately leads to...
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    Outdrive Ratchets the opposite direction when in gear....normal?

    Hello, I have a pre-alpha 160 drive. I put in a new impellar, put it back together while in forward and all seems ok. However, is it normal for the prop to ratchet in the opposite direction of the gears its in? For ex. If I have the drive in forward, and it locks in CCW, should it spin...
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    Impeller Issues...will not go all the way down drive shaft!

    Hello, I have a pre-alpha drive.....got a new impeller kit. I had to cut the existing impellar off with a dremel (would not come off shaft, but was moving up and down shaft about 1/8 of inch...so not frozen to shaft, so I am not sure why it would not slide up, so I cut it off. I think the...
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    Newly installed prop issues!

    I have a 1966 24ft Cabin cruiser, very heavy boat compared to newer boat construction. It has an GM inline 6 250ci 160hp, with a pre-alpha drive, 1.65 gear ratio. When I first bought the boat, I could not get the thing to plane nor get it to the appropriate RPM in the water, it had a 19 pitch...
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    Engine Bearing Noise? Squeals at idle but not when throttled up..????

    I have a 1966 inline 6 250 160HP gm...When the engine is idling I hear a on and off squeal, scream, and chirp coming from the motor. I checked the belts, greased the pully's and still the same sound. I put my ear next to the crankshaft area of the motor and it seams thats where its coming...
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    Installed New Drive and Now It Does Not shift Correctly? Any ideas?

    ok, I have a 1966 John Allmand cabing cruiser, 24ft with a GM 250 inline 6 160hp. The Drive is a pre-alpha 160 with 1.65 gear ratio. A couple months back while luckily near the boat ramp the bell housing broke at the hinge pins and the drive shaft going into the transom back completely out of...
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    Question about outdrive shift cable....

    As an FYI I have a 1968 Inline 6 cyl 250c.i. 160HP GM engine with a MC 160 outdrive with 24/24 gear count 1.65 ratio. Is the shift cable one piece? meaning, does the shift cable go all the way from the shift handle to the shift lever in the outdrive? Or does the cable go into the transom plate...
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    Dumb question about shift cable!

    As an FYI I have a 1968 Inline 6 cyl 250c.i. 160HP GM engine with a MC 160 outdrive with 24/24 gear count 1.65 ratio. Is the shift cable one piece? meaning, does the shift cable go all the way from the shift handle to the shift lever in the outdrive? Or does the cable go into the transom plate...
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    Mercruiser outdrive MC160 to MC80 - --- whats the difference?

    I have a 1968 Inline 6 GM 250 with a MC160 outdrive. I need to replace the top end of the outdrive. Can I use the top end of an MC80 on an MC160? Both serial numbers, years, and 24/24 gear ratios are the same. I have been doing research and Have been told that I may have a K20, MC160, or...
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    Engine Coupler - How to test?

    I have a 1968 GM 250 inline 6 160HP....with a pre-alpha out drive. I heat an oyster reef and the bellhousing broke at the pins and the drive shaft slipped out...upon further inspection I cant beleive the drive shaft could even spin with the looks of the Gimbal bearing....completely rusted...
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    Question regarding Engine coupler

    Is it possible to inspect the engine coupler after I get the gimbal bearing out of the way? Or pulling the motor the only way?
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    How to inspect an upper unit of an outdrive....the drive shaft gears etc.

    I checked the sticky first and did not see anything about this. I have read that rebuilding an upper unit of an outdrive is EXTREMELY hard to do because everyting including torque tigtening and spacing must be exact. You may have read my recent post about nearly blowing off the entire...
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    Nearly blew off entire outdrive!!! Major damage! Where should i start!

    ok, I will try and keep this short. Last week we were in Galveston Bay. Lost power at about 10pm. Wind was @ 20 knots so drifted into an oyster bed pretty quick. Got it running, thought I was in deep enough water but instead, I was between two large beds. I ran aground on one of the beds...
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