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24-04-2005, 01:03 PM
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#1
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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Props
Hi guys a quick question
I was do a quick run the other reached about 68 mph (speedo-reading) but the enigine hit it max rpm and cut off about 6200??
does this mean that I am running a prop that's too "small" or?? I really like the "pull" of the High Five but not very keen on having the engine hit the "cut-off"-point at WOT..
HELP!!!
specs:
Bat P21
Egine 225 opti
Prop High Five 21" pitch
Other Phantom owners what are you running??
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Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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24-04-2005, 01:34 PM
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#2
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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: 4,635
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21" is a bit small - try a 23" you shouldn't hit the rev limiter with that - Have you got the engine quite high?
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Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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24-04-2005, 03:05 PM
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#3
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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Will try with a larger pitch prop..
What are you running?
Dunno if it sits high?? does it??
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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24-04-2005, 03:16 PM
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#4
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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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cant really tell from that picture.
put a straight edge on the bottom of the hull out towards the engine and see where the prop shaft is in relation to the straight edge ie. 1 inch below etc.
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24-04-2005, 04:57 PM
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#5
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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Will try to post some better pics then..
Have just mounted a Laser II with a pitch of 21 - will try this later this week and see what happens..
But I guess those props I have, are too "small" - might need some 23"'s then?? 
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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25-04-2005, 10:22 PM
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#6
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Registered User
Country: North midlands uk
Location: At Home
Occupation: Gopher
Interests: boating, avoiding work
Boat name: "Maybe"
Boat make: Bayliner capri bowrider 18.5 ft 4.3 mercruiser alpha 1 out drive
Engines: 4.3l mercruiser
Cruising area: North Wales
Join Date: Apr 2005
Location: At Home
Posts: 7
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190 Horses and 1 Donkey !!
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26-04-2005, 07:41 AM
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#7
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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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some people will try and sell anything! 
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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26-04-2005, 08:32 AM
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#8
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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: 4,635
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Quote:
Originally posted by Lars T
Will try to post some better pics then..
Have just mounted a Laser II with a pitch of 21 - will try this later this week and see what happens..
But I guess those props I have, are too "small" - might need some 23"'s then??
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If anything I would expect the 21 Laser to rev more than the high 5 - but props are funny things!
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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26-04-2005, 11:45 AM
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#9
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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After testing my Laser II 21" the engine did even more rpms however it was a bit faster at 5k rpms og felt like there were lots and lots of rpms to go 
Thus i have decided to sell it - so if anyone is in market for a second hand, like new Laser II 21", let me know.. 
I ithink i want a Laser II 25" and a High Five 23" .- so i might sell my High Five 21" as well...
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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26-04-2005, 12:00 PM
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#10
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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What would a High Five 25" do to my boat??
or is the best setup a 23" High Five for pulling skiers and a 25" Laser II for speed..
Don't fancy the Cleaver..
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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26-04-2005, 12:40 PM
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#11
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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: 2,475
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ive got a 23 pitch high five for sale, pm me if your interested.
__________________
PLEASE DON'T STEAL...THE GOVERNMENT DON'T LIKE THE COMPETITION
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26-04-2005, 05:25 PM
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#12
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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 Lars T
Will try with a larger pitch prop..
What are you running?
Dunno if it sits high?? does it??
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 only a single cable steering to harness all them ponys
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26-04-2005, 07:05 PM
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#13
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Traveling
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar
Join Date: Sep 2004
Location: Alderholt
Posts: 4,225
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Its an older pic think lars has upgraded to Hydraulic since it was taken. Previous thread
(see I do pay attention !!!)
NOT-A-LOT
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27-04-2005, 08:50 AM
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#14
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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That right Blu-Fin - Before testing it on water, I had a hydraulic one installed, aften you guys told me the previous setup was too scary.. Now all i'm missing is Roofers High Five 23" and a Laser II with a 25"
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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27-04-2005, 10:33 AM
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#15
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Traveling
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar
Join Date: Sep 2004
Location: Alderholt
Posts: 4,225
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Scream & Fly have a good selection of 2nd hand ones, and there is a lot of info there on boat weights vs power vs props if you read through the threads & aticles also in the buy & sell section.
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27-04-2005, 10:43 AM
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#16
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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Have just bought Roofers High Five with a 23" and am now looking for a Laser 25"..
But will have a look at screamandfly.
Thanks..
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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27-04-2005, 03:27 PM
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#17
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Traveling
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar
Join Date: Sep 2004
Location: Alderholt
Posts: 4,225
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see also
http://www.bassboatcentral.com/props4sale1.htm
in this modern age of paypal & internet it couldn't be easier
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27-04-2005, 04:06 PM
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#18
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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: 2,475
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__________________
PLEASE DON'T STEAL...THE GOVERNMENT DON'T LIKE THE COMPETITION
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28-04-2005, 08:10 AM
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#19
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Registered User
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI
Join Date: Feb 2005
Posts: 467
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Thx guys - will look into those adds..
Chris - Did you recieving the fist "batch" of cash?? 
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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28-04-2005, 08:19 AM
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#20
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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: 4,635
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The Laser 25" might be a bit big - a 23" might be better, and it could be "tweaked" to 24" if its still revving a bit high?
__________________
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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