|
|
17-09-2009, 11:02 PM
|
#1
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
Optimax Gearbox
Just a quicky...
Is there an aftermarket gearbox/lower unit (whatever it would be called) to fit onto a 200hp mercury optimax?
Something with low water pick ups?
Cheers for any help/info
Andy
__________________
__________________
I like boating
|
|
|
17-09-2009, 11:32 PM
|
#2
|
Registered User
Location: Guernsey
Interests: Powerboats and Rugby
Boat name: C96 Fast Air
Boat make: Ocke Mannerfelt B-23
Engines: Mercury 200XS
Cruising area: Channel Islands
Join Date: Oct 2008
Location: Guernsey
Posts: 532
|
Quote:
Originally Posted by andy21
Just a quicky...
Is there an aftermarket gearbox/lower unit (whatever it would be called) to fit onto a 200hp mercury optimax?
Something with low water pick ups?
Cheers for any help/info
Andy
|
are you looking for over 50mph next season then mate? lol
__________________
|
|
|
18-09-2009, 12:12 AM
|
#3
|
Registered User
Country: UK
Location: Guernsey
Occupation: Network Engineer
Boat make: Argo 21
Engines: 2.5 EFI
Cruising area: Channel Islands
Join Date: May 2009
Location: Guernsey
Posts: 426
|
Quote:
Originally Posted by Big V
are you looking for over 50mph next season then mate? lol
|
andys boat is surprisingly fast to say he has a fishing motor! it goes as fast as kev's if im not mistaken!
|
|
|
18-09-2009, 07:07 AM
|
#4
|
Registered User
Country: Guernsey
Occupation: Engineering
Boat make: None, boo!
Engines: Turbines mainly!
Cruising area: The inside of my workshop!
Join Date: Mar 2008
Posts: 2,646
|
Best he comes and proves it next year then!
Andy, the gearbox you're after is a sportmaster, they're pretty pricey. Are you sure you'd gain that much by running your prop that high? Edd's on a standard pickup running as set up by offshore and for all round use i don't rekon he could better it. If you start going surface piercing you'll struggle to even get on the plane with a load of people in the boat
James
|
|
|
18-09-2009, 07:08 AM
|
#5
|
Registered User
Country: Guernsey
Occupation: Engineering
Boat make: None, boo!
Engines: Turbines mainly!
Cruising area: The inside of my workshop!
Join Date: Mar 2008
Posts: 2,646
|
Quote:
Originally Posted by scooby_hugh
andys boat is surprisingly fast to say he has a fishing motor! it goes as fast as kev's if im not mistaken!
|
So not that fast then?....
|
|
|
18-09-2009, 08:06 AM
|
#6
|
BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,633
|
Quote:
Originally Posted by larby
Best he comes and proves it next year then!
Andy, the gearbox you're after is a sportmaster, they're pretty pricey.
James
|
If I'm not mistaken the Sportmasters are mostly for the 2.5 litre motors they may do one for the 3.1 but it will be a different hole pattern, so make sure you get one that will fit!
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
|
|
|
18-09-2009, 08:14 AM
|
#7
|
Registered User
Location: GOLDEN MILE
Boat name: LILY THE PINK AND TERMINATOR 11
Boat make: PHANTOM 21 AND 20
Engines: 2.5 EFI X 2
Join Date: Mar 2004
Location: GOLDEN MILE
Posts: 2,471
|
You need a sportsmaster off a 300 Promax.
__________________
PLEASE DON'T STEAL...THE GOVERNMENT DON'T LIKE THE COMPETITION
|
|
|
18-09-2009, 08:45 AM
|
#8
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
Quote:
Originally Posted by larby
Best he comes and proves it next year then!
Andy, the gearbox you're after is a sportmaster, they're pretty pricey. Are you sure you'd gain that much by running your prop that high? Edd's on a standard pickup running as set up by offshore and for all round use i don't rekon he could better it. If you start going surface piercing you'll struggle to even get on the plane with a load of people in the boat
James
|
Its not 100% for the low water pick ups, I figured people talk about putting these different gearboxes on other mercs, so there must be an advantage somewhere along the line!
As for the prop height, i'd like to fit a lifter too... if I can lift the engine about 2" then it should be able to tilt all the way out the water when moored...
__________________
I like boating
|
|
|
18-09-2009, 08:46 AM
|
#9
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
Quote:
Originally Posted by roofer
You need a sportsmaster off a 300 Promax.
|
Cheers!
Have you (or know anyone who has) done the swap? Any performance gains?
__________________
I like boating
|
|
|
18-09-2009, 08:49 AM
|
#10
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
Quote:
Originally Posted by Big V
are you looking for over 50mph next season then mate? lol
|
If I can raise my top speed by 3mph, I "should" be able to knock 2 minutes off my current round island time...
(sea conditions dependant)
__________________
I like boating
|
|
|
18-09-2009, 08:54 AM
|
#11
|
BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,633
|
Quote:
Originally Posted by andy21
Its not 100% for the low water pick ups, I figured people talk about putting these different gearboxes on other mercs, so there must be an advantage somewhere along the line!
As for the prop height, i'd like to fit a lifter too... if I can lift the engine about 2" then it should be able to tilt all the way out the water when moored...
|
Get a Stainless Marine Gorilla 3 lifter - they are the strongest in my experience! 3mph is certainly possible ............. IMHO
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
|
|
|
18-09-2009, 09:09 AM
|
#12
|
Registered User
Country: Guernsey
Occupation: Engineering
Boat make: None, boo!
Engines: Turbines mainly!
Cruising area: The inside of my workshop!
Join Date: Mar 2008
Posts: 2,646
|
So are you gonna race next year then andy? The promax sporty was the one i meant, IIRC, Steve Hutch has a fleetmaster, that'd be a cheaper way of getting much the same gains?
What top end are you getting at the mo? Are you wanting to rig her just for top end performance or all round usability? A lifter would be a good idea as it'd allow you to drop the motor for better holeshot.
James
|
|
|
18-09-2009, 01:46 PM
|
#13
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
I'm just toying with a few ideas at the moment really...
Put a bit more money into mine and have 1 fairly fast but reliable boat for race and pleasure...
Put the money into a lower spec race only boat and keep the ring for pleasure (that sounds wrong)
Or sell my Ring (if that kind of work is legal over here) and buy a nice put put fishing boat that will plough through big waves like a lifeboat
__________________
I like boating
|
|
|
18-09-2009, 01:48 PM
|
#14
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
oh, speed wise, (without weed) she will comfortably do 53-54 knots and 56-57 knots on the good days!
__________________
I like boating
|
|
|
18-09-2009, 04:10 PM
|
#15
|
simon
Country: uk
Location: Three Cross Dorset
Occupation: Engineer
Interests: Anything on the water
Boat name: Bad Medicine
Boat make: Sonic Prowler
Engines: Merc 496 Mag Ho
Cruising area: Solent to Weymouth
Join Date: May 2007
Location: Three Cross Dorset
Posts: 83
|
Have you concidered a Bobs Machineshop nose cone? Lot cheeper alternative and still get the hight.
|
|
|
18-09-2009, 04:18 PM
|
#16
|
Registered User
Country: UK
Location: Guernsey
Occupation: Network Engineer
Boat make: Argo 21
Engines: 2.5 EFI
Cruising area: Channel Islands
Join Date: May 2009
Location: Guernsey
Posts: 426
|
Get an offshore leg aswel andy
|
|
|
18-09-2009, 04:31 PM
|
#17
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
Quote:
Originally Posted by simon
Have you concidered a Bobs Machineshop nose cone? Lot cheeper alternative and still get the hight.
|
Just had a look at them now... looks like an easy way allowing me to lift the motor and not too many $$$
Part of the gearcase changine would be to change the gear ratio aswell though...
Does anybody have any comparisons between a standard gearbox and one of these fancy jobs... Doesn't have to be the same motor i guess, just anything to compare!
Cheers for the help so far!
__________________
I like boating
|
|
|
18-09-2009, 04:31 PM
|
#18
|
Registered User
Country: UK
Occupation: Designin' Stuff
Interests: Boating/4x4s/Fast Cars
Boat name: Namotu
Boat make: Extreme 24
Engines: 383 Mag Stroker
Cruising area: Channel Isles
Join Date: Aug 2008
Posts: 557
|
Quote:
Originally Posted by scooby_hugh
Get an offshore leg aswel andy
|
would probably sound quite nice!
__________________
I like boating
|
|
|
18-09-2009, 05:02 PM
|
#19
|
Registered User
Country: UK
Location: Guernsey
Occupation: Network Engineer
Boat make: Argo 21
Engines: 2.5 EFI
Cruising area: Channel Islands
Join Date: May 2009
Location: Guernsey
Posts: 426
|
your opti will be relliable so get an offshore leg and a good gearbox and set yours up for pleasure/racing with the transom jack plate!! no fishing boats
|
|
|
18-09-2009, 06:10 PM
|
#20
|
Registered User
Country: Guernsey
Occupation: Engineering
Boat make: None, boo!
Engines: Turbines mainly!
Cruising area: The inside of my workshop!
Join Date: Mar 2008
Posts: 2,646
|
Quote:
Originally Posted by scooby_hugh
Get an offshore leg aswel andy
|
I'm not aware of such a thing existing for the opti...?
Quote:
Originally Posted by andy21
Part of the gearcase changine would be to change the gear ratio aswell though...
|
Why?? It's not like you're at the kinda speeds where it'd be an advantage...
Quote:
Originally Posted by andy21
Does anybody have any comparisons between a standard gearbox and one of these fancy jobs... Doesn't have to be the same motor i guess, just anything to compare!
|
IMO, there's no gain to be had from just swapping the gearbox, the advantage of the sporty box is that it allows you to raise prop height, thus leaving less of the box dragging in the drink. At most you'll see about a 3-5mph increase, thats what i used to get. In the revenger i loose a load of speed if i go surface piercing (with the trim, it's pretty close all the time).
James
__________________
|
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|