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07-06-2007, 05:22 PM
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#1
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Registered User
Country: england
Location: surrey
Occupation: greenkeeper
Boat name: not names
Boat make: 21 ft marshan
Engines: 115 hp merc 1988 red band
Cruising area: solent
Join Date: Oct 2006
Location: surrey
Posts: 53
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help gear box problems
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07-06-2007, 05:39 PM
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#2
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Registered User
Occupation: Champion Pie Eater
Boat name: On The Rocks
Boat make: Ring 21 marshan 17 four winns horizon, hydro 3 pointer, f2 cat, backdraft 22
Cruising area: Way up norf and Sarf coast areas
Join Date: Apr 2007
Posts: 1,619
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should just be a case of removing the impellor hsg remove the drive shaft, once the drive shaft and pinion gear are removed from the top of the gearbox this should then allow the main shaft with the reverse and forward gears and clutch assy on to slide out the gearbox housing,
i think
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07-06-2007, 05:45 PM
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#3
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Registered User
Country: UK
Location: South West
Boat make: Cyclone/ Cyclone/Rinker
Engines: Merc 2.5 efi's/300XS/5.0 v8
Join Date: Feb 2005
Location: South West
Posts: 592
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Sounds like your prop bush has gone. or both bush and gearbox
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07-06-2007, 05:53 PM
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#4
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Registered User
Country: england
Location: surrey
Occupation: greenkeeper
Boat name: not names
Boat make: 21 ft marshan
Engines: 115 hp merc 1988 red band
Cruising area: solent
Join Date: Oct 2006
Location: surrey
Posts: 53
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Quote:
Originally Posted by gazza
should just be a case of removing the impellor hsg remove the drive shaft, once the drive shaft and pinion gear are removed from the top of the gearbox this should then allow the main shaft with the reverse and forward gears and clutch assy on to slide out the gearbox housing,
i think
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i have removed the water pump and impeller but cant see how to remove the bottom part of the water pump
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07-06-2007, 05:59 PM
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#5
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Registered User
Country: england
Location: surrey
Occupation: greenkeeper
Boat name: not names
Boat make: 21 ft marshan
Engines: 115 hp merc 1988 red band
Cruising area: solent
Join Date: Oct 2006
Location: surrey
Posts: 53
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Quote:
Originally Posted by Wacky Racer
Sounds like your prop bush has gone. or both bush and gearbox
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the prop can be rotated in reverse when in forward gear it makes a clicking noise andm is free turning as if not in gear but if you rearly pull on the prop it pops pasted rotates in the right direction stange
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07-06-2007, 07:41 PM
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#6
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Registered User
Occupation: Champion Pie Eater
Boat name: On The Rocks
Boat make: Ring 21 marshan 17 four winns horizon, hydro 3 pointer, f2 cat, backdraft 22
Cruising area: Way up norf and Sarf coast areas
Join Date: Apr 2007
Posts: 1,619
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as wacky racer says iit could be the rubber bush in the prop, is the shaft the prop is on turning as well as the prop when you have it in gear and force is applied?
if not its the bush, if it is turning the problem is in the guts of the box.
the engine moving about could be if the bush stops slipping if it is that! then the prop takes a grip.
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07-06-2007, 09:21 PM
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#7
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Registered User
Country: England
Location: Cowes, Isle of Wight
Occupation: Marine engineer/electrician
Interests: Boat, Landy, and other toys :)
Boat name: Mad Max/Master Fiddler
Boat make: Phantom 18/Fletcher Bravo
Engines: Merc XR2
Cruising area: Solent/IOW
Join Date: Dec 2005
Location: Cowes, Isle of Wight
Posts: 935
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From the sounds you've described is gear not bush,
don't try takin box apart, no offence but is specialist job gettin measurements of play etc,
seek engineer to do it for you,
may cost more but don't wanna do it yourself then a tiny bit of play ruin it the first time you go out.
Max
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Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, grinning from ear to ear, overdosing on adrenaline and proclaiming “KINNEL!! WHAT A RIDE!!”
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07-06-2007, 10:39 PM
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#8
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Registered User
Country: england
Location: surrey
Occupation: greenkeeper
Boat name: not names
Boat make: 21 ft marshan
Engines: 115 hp merc 1988 red band
Cruising area: solent
Join Date: Oct 2006
Location: surrey
Posts: 53
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my old man is a yamaha tec but has never worked on a merc before so it seams the same but the bearing holder is stuck solid with corrotion we have tryed a slide hamer and suff but cant move it has any one had this problem i know the have at his work and the just bin the skeg and box
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07-06-2007, 11:29 PM
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#9
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Registered User
Country: UK
Location: South West
Boat make: Cyclone/ Cyclone/Rinker
Engines: Merc 2.5 efi's/300XS/5.0 v8
Join Date: Feb 2005
Location: South West
Posts: 592
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Try heat to the outercasing.
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08-06-2007, 01:16 AM
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#10
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Registered User
Country: England
Location: West Sussex
Occupation: IT Manager
Boat make: Phantom 21, Plancraft Seaflite
Engines: Merc V6, mercruiser V8
Cruising area: Littlehampton, Fowey
Join Date: Aug 2004
Location: West Sussex
Posts: 116
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Put the prop on(preferably an old one), but not all the way. Put a couple of pieces of packing either side into the gap between prop hub a gearbox outer face, and then wind the prop nut. On your lower you probably don't need to remove gear selector shaft, but to be safe take it out anyway beforehand. Once it breaks free you can continue with the slide hammer
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09-06-2007, 01:00 AM
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#11
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Registered User
Country: england
Location: surrey
Occupation: greenkeeper
Boat name: not names
Boat make: 21 ft marshan
Engines: 115 hp merc 1988 red band
Cruising area: solent
Join Date: Oct 2006
Location: surrey
Posts: 53
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Quote:
Originally Posted by marshan162
Put the prop on(preferably an old one), but not all the way. Put a couple of pieces of packing either side into the gap between prop hub a gearbox outer face, and then wind the prop nut. On your lower you probably don't need to remove gear selector shaft, but to be safe take it out anyway beforehand. Once it breaks free you can continue with the slide hammer
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chears worked perfect it is the dog clutch and the forward gear that has gone thats the problem any one know wear i could get one or how much would roughly cost chears
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09-06-2007, 10:34 AM
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#12
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Registered User
Occupation: Champion Pie Eater
Boat name: On The Rocks
Boat make: Ring 21 marshan 17 four winns horizon, hydro 3 pointer, f2 cat, backdraft 22
Cruising area: Way up norf and Sarf coast areas
Join Date: Apr 2007
Posts: 1,619
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Try Sierra Marine Parts
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09-06-2007, 06:43 PM
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#13
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Registered User
Country: england
Location: surrey
Occupation: greenkeeper
Boat name: not names
Boat make: 21 ft marshan
Engines: 115 hp merc 1988 red band
Cruising area: solent
Join Date: Oct 2006
Location: surrey
Posts: 53
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Quote:
Originally Posted by gazza
Try Sierra Marine Parts
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dose any one have a way of contacting them i looked on the barbus sight the forward gear is 300pound and dog clutch is 157pound plus 93 pound postage ant rearly spending that much 1988 115hp what you recon
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09-06-2007, 07:59 PM
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#14
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Registered User
Occupation: Champion Pie Eater
Boat name: On The Rocks
Boat make: Ring 21 marshan 17 four winns horizon, hydro 3 pointer, f2 cat, backdraft 22
Cruising area: Way up norf and Sarf coast areas
Join Date: Apr 2007
Posts: 1,619
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is a lot to spend,you could try a breakers Bill Higham etc for a 2nd hand box.
I will speak to my mate Dave Anderson Marine Monday see what he suggests.
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09-06-2007, 08:13 PM
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#15
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Registered User
Country: england
Location: surrey
Occupation: greenkeeper
Boat name: not names
Boat make: 21 ft marshan
Engines: 115 hp merc 1988 red band
Cruising area: solent
Join Date: Oct 2006
Location: surrey
Posts: 53
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Quote:
Originally Posted by gazza
is a lot to spend,you could try a breakers Bill Higham etc for a 2nd hand box.
I will speak to my mate Dave Anderson Marine Monday see what he suggests.
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thanks cause at this rate getting depressed cause rebuild traier refitted boat new floor had safty froring fitted and wealded so boat is fully water tight and this has hapened
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09-06-2007, 08:27 PM
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#16
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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Quote:
Originally Posted by jamesbitpart
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Keypart are an agent for Sierra
They're in Watford. 01923 221490 ask for Paul Ahearn
or, http://www.keypart.co.uk/
EDIT> just looked at their site, and it seems they've moved to Kings Langley now.
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