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06-07-2013, 10:56 PM
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#1
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Registered User
Country: Guernsey
Interests: racing!
Boat name: The boat with no name
Boat make: P20
Engines: Promax 225
Cruising area: Mainly the sea -sometimes the air
Join Date: May 2009
Posts: 210
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Merc gearbox question
Possibly a stupid question but are merc gearboxes interchangeable between 15 and 20 inch legs or are some gearboxes for 15s and others for 20s????
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07-07-2013, 09:41 AM
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#2
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Registered User
Country: Guernsey
Occupation: Postie
Interests: Heavy Heavy Metal
Boat name: Slayer II, Slayer, Pen15
Boat make: Phantom 19G-R, Bernico F2 Extreme, Ring 15
Engines: Evinrude 115HO, Yam 90
Cruising area: Channel Islands
Join Date: Aug 2009
Posts: 1,460
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The gearbox itself is the same, but the driveshafts are different lengths. They're interchangeable, but it's not straightforward
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07-07-2013, 10:53 PM
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#3
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Quote:
Originally Posted by Paul E
The gearbox itself is the same, but the driveshafts are different lengths. They're interchangeable, but it's not straightforward
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Unless you get a drive shaft extension to put on a 15 to run in a 20
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08-07-2013, 10:44 PM
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#4
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Registered User
Country: Guernsey
Interests: racing!
Boat name: The boat with no name
Boat make: P20
Engines: Promax 225
Cruising area: Mainly the sea -sometimes the air
Join Date: May 2009
Posts: 210
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Cheers guys! I want to put one off a 20 onto a 15 unfortunately! 
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09-07-2013, 09:39 AM
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#5
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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I take it theyre both not the same gearcase then. If ones a sporty and the other a CLE, the driveshafts wont be interchangable.
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09-07-2013, 09:50 AM
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#6
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Registered User
Country: guernsey
Occupation: mechanic
Boat name: top gun dewpacabra
Boat make: phantom 600 phantom 19
Engines: mercury 2.5 mercury 2.4 mercury 150 pro xs
Cruising area: channel islands
Join Date: Jul 2012
Posts: 41
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Gearbox
Hi John I have a 15'' 4 hole cle and I'm after a 20'' if you want to do a deal? Cheers patrick
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12-07-2013, 07:47 PM
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#7
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Registered User
Country: UK
Location: Devon
Occupation: Builder
Boat make: Various phantoms, sorcerrer 660, Tremlett, Blufin, Tornado
Engines: various 50 - 200hp
Cruising area: Devon
Join Date: Apr 2007
Location: Devon
Posts: 160
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Patrick, if John doesn't take it, I would be interested in a similar deal
What ratio is your 15"
Brgrds. Paul
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13-07-2013, 12:19 AM
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#8
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Registered User
Country: Uk
Location: Hamworthy
Interests: fast boats,
Boat make: P21,
Engines: 200 Merc.
Cruising area: poole bournemouth
Join Date: Feb 2013
Location: Hamworthy
Posts: 26
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I have a 20" drive shaft if you need 1.
I bought a cle box and used me offshore 25" shaft so this 1 is good as new.
Let me know if you want to buy if off me.
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17-07-2013, 01:50 PM
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#9
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Registered User
Country: Guernsey
Interests: racing!
Boat name: The boat with no name
Boat make: P20
Engines: Promax 225
Cruising area: Mainly the sea -sometimes the air
Join Date: May 2009
Posts: 210
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Cheers guys - looking for a 15" though as I'm going to keep the 15" leg
Think I'm going to flog the 1.87 20" sportmaster with the rest of the boat (hull's fooked though!) powerhead, rigging / trailer etc to get it all gone at once!
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17-07-2013, 06:15 PM
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#10
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Registered User
Country: channel islands
Location: guernsey
Boat name: adrenalin
Boat make: ring 21c
Engines: merc 150 pro xs
Cruising area: channel islands
Join Date: Nov 2011
Location: guernsey
Posts: 34
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i would buy that sporty if you would sell it separately.
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