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12-05-2005, 07:54 PM
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#1
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Registered User
Country: United kingdom
Location: West Sussex
Occupation: Grease Monkey
Interests: Makin my boat faster!
Boat name: S.B Racing
Boat make: Ocke mannerfelt canopied B23 / Zapcat
Engines: Merc 200XS Gen 2 / Tohatsu 50
Cruising area: littlehampton/Southampton
Join Date: Jan 2005
Location: West Sussex
Posts: 2,656
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jack plate/engine height?
Rite guys im fitting a manual jack plate to my phantom at the weekend! wots the best way to go about setting the base engine height? is it best to set the jack to half its travel and position it on the transom so the point of my gearbox is inline with the bottom of the boat therefore i can jack past it if i want and lower in the water if i want?
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Class 3C Mono EPA National speed record holder 95.35 mph Avg!
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12-05-2005, 08:07 PM
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#2
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Le Cat
Country: France
Location: Paris
Occupation: Computer Sales
Boat name: Le Cat
Boat make: Argo Cat 18
Engines: Mercury 2.4EFI
Cruising area: Paris
Join Date: Mar 2004
Location: Paris
Posts: 753
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I'd set it with the cavitation plate level with the bottom of the hull, and establish speed and rpm's for every cm or 1/2 inch you go up. A water pressure gauge is prefered.
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12-05-2005, 08:09 PM
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#3
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Registered User
Country: United kingdom
Location: West Sussex
Occupation: Grease Monkey
Interests: Makin my boat faster!
Boat name: S.B Racing
Boat make: Ocke mannerfelt canopied B23 / Zapcat
Engines: Merc 200XS Gen 2 / Tohatsu 50
Cruising area: littlehampton/Southampton
Join Date: Jan 2005
Location: West Sussex
Posts: 2,656
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thats quite deep in the water isnt it?
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Class 3C Mono EPA National speed record holder 95.35 mph Avg!
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12-05-2005, 08:12 PM
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#4
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Registered User
Country: England
Location: Surrey
Occupation: Subsea Design Engineer
Boat name: The Mutz Nuts/Beyond Obsession/HoneyRider
Boat make: Phantom 20, Phantom 25, Cigarette 39 TopGun Unlimited
Engines: Mercury Promax 300 Madefi, Twin Mercury 200XS, Twin Merc Racing 525 EFI's
Cruising area: Eastney/Portsmouth
Join Date: Feb 2005
Location: Surrey
Posts: 757
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Quote:
Originally posted by FrenchPhil
I'd set it with the cavitation plate level with the bottom of the hull, and establish speed and rpm's for every cm or 1/2 inch you go up. A water pressure gauge is prefered.
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bit low?!when my jackplate is all the way up the point is 1 inch above the pad
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12-05-2005, 08:18 PM
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#5
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Le Cat
Country: France
Location: Paris
Occupation: Computer Sales
Boat name: Le Cat
Boat make: Argo Cat 18
Engines: Mercury 2.4EFI
Cruising area: Paris
Join Date: Mar 2004
Location: Paris
Posts: 753
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Yep but it's just for a start
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12-05-2005, 08:27 PM
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#6
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Registered User
Country: United kingdom
Location: West Sussex
Occupation: Grease Monkey
Interests: Makin my boat faster!
Boat name: S.B Racing
Boat make: Ocke mannerfelt canopied B23 / Zapcat
Engines: Merc 200XS Gen 2 / Tohatsu 50
Cruising area: littlehampton/Southampton
Join Date: Jan 2005
Location: West Sussex
Posts: 2,656
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so mutz nuts how low is it when its all the way down??
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Class 3C Mono EPA National speed record holder 95.35 mph Avg!
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12-05-2005, 08:41 PM
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#7
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Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
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IMO you should mount your engine on the jack plate so that you can not go more than 1 1/2" above the pad. this will allow you to go to around 4" below which is plenty.
if you haven't got hydraulic steering any higher than level will be almost impossible to hang on too.
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12-05-2005, 09:00 PM
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#8
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Registered User
Country: England
Location: Surrey
Occupation: Subsea Design Engineer
Boat name: The Mutz Nuts/Beyond Obsession/HoneyRider
Boat make: Phantom 20, Phantom 25, Cigarette 39 TopGun Unlimited
Engines: Mercury Promax 300 Madefi, Twin Mercury 200XS, Twin Merc Racing 525 EFI's
Cruising area: Eastney/Portsmouth
Join Date: Feb 2005
Location: Surrey
Posts: 757
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Quote:
Originally posted by scottyboy
so mutz nuts how low is it when its all the way down??
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all the way down its about 4 inch down , i cant have it that far down tho because ive got hydraulic steering so it will crush it!
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12-05-2005, 09:47 PM
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#9
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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Quote:
Originally posted by TheMutzNuts
all the way down its about 4 inch down , i cant have it that far down tho because ive got hydraulic steering so it will crush it!
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I have that same problem
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12-05-2005, 09:53 PM
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#10
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hello
Join Date: Mar 2004
Posts: 2,739
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Just bolt it higher up on the lift, there's loads of holes on both the lift and the engine saddle.
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