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27-11-2012, 11:32 AM
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#1
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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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race preping mariner
hi all i am going to be using my mariner 2.5 200 carb for racing next year and i would like to put 16amp electrics on and replace the reeds with carbon ones.
i know that i need to replace the stator and the flywheel for the electrics but i need to know if there is anuthing else that needs replacing as well.
i would also like to know what a good make/brand of carbon reeds would be.
any help would be appreciated.
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27-11-2012, 11:49 AM
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#2
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Registered User
Country: UK
Location: london
Occupation: Powerboat Skipper
Interests: Boats , bikes!
Boat name: Renegade
Boat make: GPV-RENEGADE
Engines: 150 HO etec
Cruising area: Thames, south coast, anywhere!
Join Date: Dec 2008
Location: london
Posts: 2,330
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Boysen reeds is my prefered brand.
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Im re branding pepper spray as Arsehole Repellant.im going to make a fortune.
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27-11-2012, 12:24 PM
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#3
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Registered User
Boat make: Phantom 23
Join Date: Mar 2006
Posts: 1,693
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Replace the diaphram in the mechanical fuel pump
New fuel filter
New Spark plugs
Check timing @ WOT (which you will have to do anyway if you are changing stator/trigger/flywheel to 16amp.
Would be a good idea to check compression too & do a plug chop @ WOT to make sure all cylinders are burning evenly.
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27-11-2012, 12:35 PM
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#4
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Registered User
Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
Boat name: still no worries
Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe
Join Date: Dec 2007
Location: salcombe
Posts: 499
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The engine mounts :- nylon or ally and all the bushes !
(More important than electrics or reeds, I've done all of the above on a 2.5 mariner and 20thou off the heads)
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27-11-2012, 02:31 PM
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#5
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Registered User
Country: Guernsey Channel Isles
Location: West Coast
Occupation: Hotelier
Interests: Powerboat racing
Boat name: Vodkatini,Cap Camarat,Easy RiderSuper Rider & Hirrondelle
Boat make: Phantom 21,Jeaneau 925 Avenger19.Lorne Campbell Slipstream Tremlett 21.Tigershark 21
Engines: Volvo 5 litre,Merc 115 Tower,Twin 250 Suzukis and 145 Mercruiser LX
Cruising area: Channel Islands and French coast
Join Date: Jan 2009
Location: West Coast
Posts: 612
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Spray the engine black and put Mercury stickers on it !
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Guernsey - The home of offshore powerboat racing
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27-11-2012, 03:16 PM
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#6
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Registered User
Country: UK
Join Date: Jun 2006
Posts: 1,237
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Not very helpful Big Dutch but funny.
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27-11-2012, 03:19 PM
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#7
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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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The engine is black i am going for a bridgeport style cowl for next year and is on a offshore mid so mounts aren't a worry just wanted to know if I needed to do more than replace the stator which it seems I do. Thanks
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27-11-2012, 03:55 PM
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#8
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Registered User
Country: england
Location: the grim north
Occupation: robot
Cruising area: tyne
Join Date: Nov 2004
Location: the grim north
Posts: 915
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Remove the regulators and replace with a 16 amp rectifier. Dump the oil injection and timing advance module.
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Speed costs weight so what do we cut off first
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27-11-2012, 05:44 PM
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#9
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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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As I recall it you ran with a silver alien cowl for a while big d and I have already removed the oil injection
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27-11-2012, 06:21 PM
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#10
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Registered User
Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
Boat name: still no worries
Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe
Join Date: Dec 2007
Location: salcombe
Posts: 499
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Ok I'll revise my earlier post just check the bushes, where the trim ram connects to the saddle is the favourite for play and I would still take 20 thou off the heads!
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27-11-2012, 06:59 PM
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#11
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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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Speak to Lee Gorvel mate he did mine when I cooked the 40amp stuff. We did it in the pits so it wasn't hard
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27-11-2012, 07:06 PM
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#12
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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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Also I just got some carbon reeds for my Evinrude from Chris Carson Marine in the US. Read very good things about his reeds, they were well priced and only $5 shipping. Search for him on ebay.com, there's a few different version depending on how high you want to rev
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29-11-2012, 07:55 PM
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#13
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Registered User
Location: poole dorset
Join Date: Mar 2004
Location: poole dorset
Posts: 868
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Dont be tempted to switch to electric fuel pump, they are more trouble than they are worth. Just make sure that the mechanical pump is in good condition and both diaphrams are good.
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29-11-2012, 08:06 PM
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#14
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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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sound advice cb1 wasnt going to anyway no point adding in suff you dont need when it is just another thing that can go wrong
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29-11-2012, 09:11 PM
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#15
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Trade Member
Country: United States
Location: South Texas. USA
Occupation: Own JSRE ( Jay Smith Racing Engines )
Interests: ACCELERATION (anykind )
Join Date: Jan 2006
Location: South Texas. USA
Posts: 244
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Cut heads to yeild 145 lbs cranking at sea level, I use TDR reed valves in my all out race as well as recreational engines they are bullet proof TDR has been building reeds for 35 years....IMO I'd stay away from carbon fiber reeds , stick with the poly resin reeds I find them to be MUCH more durable in our racing gasoline as well as our alky Drag race engines turning a zillion RPMs...
Jay
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29-11-2012, 11:01 PM
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#16
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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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thanks for the advice jay but i am not realy looking to get any more power out of the engine and i want to keep it as reliable as possable so i dont want to start playing with things like commpression just want to be able to rev it to 6500rpm without worrying about melting electrics or breaking reeds.
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29-11-2012, 11:30 PM
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#17
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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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Quote:
Originally Posted by Phill_Dewe
thanks for the advice jay but i am not realy looking to get any more power out of the engine and i want to keep it as reliable as possable so i dont want to start playing with things like commpression just want to be able to rev it to 6500rpm without worrying about melting electrics or breaking reeds.
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you need more power to go faster!!
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01-12-2012, 08:08 PM
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#18
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Registered User
Location: poole dorset
Join Date: Mar 2004
Location: poole dorset
Posts: 868
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You can spend ££££££'s on the mechanical side, but if the balance of the boat ain't right you'll be wasting your money. That, and a prop that works for you, and the boat and you both are at ease with. When she's flying it looks good but your losing speed. Your aim should be to get the best possible AVERAGE speed in a race, not just out and out top speed that you can only use for 10% of the time.
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01-12-2012, 09:16 PM
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#19
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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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cb1 your right that the top speed is not as relivant as being able to maintain a good avrage got the boat set up well this year with a good prop. i have got the top speed to 72mph and i could do 60mph through pritty much anything (within reason) i dont think it is realistic to expect much more speed if any just dont want to go breaking stuff on the engine by over revving it and ruin a race weekend.
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04-12-2012, 12:39 AM
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#20
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Trade Member
Country: United States
Location: South Texas. USA
Occupation: Own JSRE ( Jay Smith Racing Engines )
Interests: ACCELERATION (anykind )
Join Date: Jan 2006
Location: South Texas. USA
Posts: 244
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My favorite saying:
" A Marginal Motor and a Magical Prop can and will win World Titles "
" A Magical Motor and a Marginial Prop can't out run my dog with a full bladder "
Jay Smith
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