reeac
regular
Reged: 06/06/2003
Posts: 287
Loc: Orford, Suffolk, UK
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I've lost the drive on my Mariner 3.3 and my first reaction is to look at the dog clutch. It looks as if I need to separate the motor from the lower part at the joint just above the clutch but despite having removed 6 screws from the underside the two halves won't separate. Am I "missing a screw", do I need to remove the clutch control shaft, is it all just glued together by a gasket or should I be dismantling at some other point?
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MoodyNick
regular
Reged: 29/04/2003
Posts: 6375
Loc: Lymington
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before you start stripping it down, have you checked the sheer pin - ie under the propellor. with the prop off, does the shaft rotate when you put the engine into gear.
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Renamed, to represent my personality instead of physique.
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VicS
regular
Reged: 13/07/2002
Posts: 9283
Loc: Home: Kent. Boat: Chichester
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You don't say what year it is so i may be looking at the wrong one BUT
You have checked the shear pin?
Rubber hub if it has one?
The shift rod is in two sections have you checked the joint accessible via a rubber plug in the leg?
It the shift rod being moved by the lever?
I think you are trying to separate the wrong bits. There are only 2 screw holding the gear-case onto the leg as far as I can see. You are not trying to separate the powerhead from the leg are you?
Check the operation of the shift rod first, including that joint.
If that really is functioning and you have to get at the clutch then you will have to get into the gear case directly. I am not sure if that can be done without removing it from the leg . But that is the two screws mentioned plus the joint in the shift rod to undo.
You will be able to locate exploded diagrams on various websites including Crowley Marine
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Old Chemists never die, they just fail to react
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reeac
regular
Reged: 06/06/2003
Posts: 287
Loc: Orford, Suffolk, UK
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Problem solved, chaps, it was the shear pin! I'm rather ashamed that I never thought to check it first but I've never had one go before and the failure occured when my tender was in deep water tied to my cruiser on a swinging mooring i.e. no impact of the prop. with anything as far as I know. Anyway, thanks for the suggestions ... all very educational.
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alrob
regular
Reged: 19/07/2005
Posts: 814
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get spare ones mine went whilst engine was quite new & for no reason
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