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Old 28 March 2006, 16:50   #11
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Quote:
Originally Posted by Nos4r2
No, he's not. There is NO SCREW COUPLING ON THESE ENGINES. I OWN 2 OF THEM and have removed the lower units MANY TIMES.

This is what the lower unit looks like when it's off-the short splined shaft at the front of the unit is the gearchange shaft.

thats fucking shagged
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Old 28 March 2006, 17:15   #12
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yep.... It's from a scrapper I bought. I took the engine apart with a lump hammer Surprisingly, the lower units internals were fine. That chunk missing from the skeg isn't broken off, it's corroded!
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Old 28 March 2006, 17:32   #13
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Quote:
Originally Posted by stu1288
thats fucking shagged
Good analysis.

You're probably qualified to post on this thread:
Calling Engineers!!!
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Old 29 March 2006, 01:42   #14
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Originally Posted by gavin
Jwalker is right...
Quote:
Originally Posted by Nos4r2
No, he's not....
Its possible you're both right... production of same model, same year items can change for no apparent reason, usually change of supplier for a component. I blame supply chain management

Anyway, enough of that... disagreement and contradiction makes for more amusing reading!
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Old 29 March 2006, 06:01   #15
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Its possible you're both right...
I didn't claim to be 'right'. I simply asked whether the gearshift had been disconnected.
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Old 29 March 2006, 07:46   #16
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Not wanting to change the thread or anything, but does anyone have a prop for a 50 Merc blueband they would like to sell- 13 spline shaft, 4 cylinder,etc..
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Old 29 March 2006, 13:31   #17
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nice sunny day thoght we would have another look at splitting lower unit two things first its a red band on the engingine cover and number on the engine plug is B17396.
right the lower unit drops about 10mm and stops on a positive knock which can be felt through the fly wheel on top , it seems by feel that what ever is stopping it splitting is directly under the fly wheel
any ideas ?? if theres anything under there that could stop it part ie circlip ?or nut ?
Dino
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Old 30 March 2006, 10:30   #18
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still stuck read last post!!

refer to my last post first as more info in that ,another thought is does anything have to line up to allow it to drop ? is there a difference between the red banded and blue banded mercs as the way it drops to a 10mmm gap seems to positive to be crud gave it a good go with wedges but will not move anymore can post photos if any use .
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Old 30 March 2006, 12:11   #19
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Merc

If it hasnt been removed for some time,it may be corroded in the drive shaft to crank splines or if it has the same arrangement for the gear select lower down it could be there. I will delve into some old books tomorrow
Paul
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Old 30 March 2006, 12:27   #20
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It SHOULD be the same lower unit-to the best of my knowledge it's the same lower unit from 1968ish to 1985ish....but your engine is listed as being 1964-1966 and at a guess I'd say probably 1964 as it's towards the beginning of the numbers listed. You need to check spline size on the prop output shaft to be sure which model, but my manual which covers 63-88 still doesn't show a bolt.

Have a look at http://www.oldmercs.com for parts lists etc

This is unless yours is the one-piece cowl much later model with a red band that would probably make it less than 10 years old....
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