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15-04-2010, 06:24 PM
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#21
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Registered User
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath
Join Date: Mar 2004
Location: In a box
Posts: 5,201
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Quote:
Originally Posted by "Old beardy"
Just like me!! I think it once belonged to Noah!
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Ah, Bless.....
Here's the part number, and Barrus are out of stock, although your local merc dealer should have one one the shelf. (there's one in me garage!)
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Chaos for Moderator.
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15-04-2010, 06:32 PM
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#22
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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
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Quote:
Originally Posted by Mike_G
Sorry for a bit offtopic but is it true that 2.5 280hp hasa to be rebuild every 150 hours?? What about 2.5 260hp??
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dont know about the 280 but the 260 is 100 hours max but most rebuild much sooner
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15-04-2010, 06:51 PM
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#23
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Registered User
Country: uk
Location: Berkshire
Boat name: Apparition
Boat make: Phantom 21
Engines: merc 2.5 280
Cruising area: solent
Join Date: Nov 2009
Location: Berkshire
Posts: 28
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Just spoke to guy and he carries them with him so is going to replace tomorrow if looks to be the problem, thanks for all advice really appreciated will let you know outcome.
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15-04-2010, 07:52 PM
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#24
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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
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Quote:
Originally Posted by slybadger
Just spoke to guy and he carries them with him so is going to replace tomorrow if looks to be the problem, thanks for all advice really appreciated will let you know outcome.
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is your p21 the white hull with blue and yellow stripes?
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15-04-2010, 09:59 PM
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#25
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Registered User
Country: uk
Location: Berkshire
Boat name: Apparition
Boat make: Phantom 21
Engines: merc 2.5 280
Cruising area: solent
Join Date: Nov 2009
Location: Berkshire
Posts: 28
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No mate its the white with black screen and trim built by cobra
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15-04-2010, 10:30 PM
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#26
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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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What ever the bush is i'm sure the problem is that.
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Im re branding pepper spray as Arsehole Repellant.im going to make a fortune.
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16-04-2010, 12:07 AM
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#27
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Registered User
Country: UK
Location: South West
Boat make: Cyclone/ Cyclone/Rinker
Engines: Merc 2.5 efi's/300XS/5.0 v8
Join Date: Feb 2005
Location: South West
Posts: 592
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Quote:
Originally Posted by scooby_hugh
dont know about the 280 but the 260 is 100 hours max but most rebuild much sooner
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Would say more like 30 hours if running in the top rev range
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16-04-2010, 02:12 PM
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#28
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Registered User
Country: uk
Location: Berkshire
Boat name: Apparition
Boat make: Phantom 21
Engines: merc 2.5 280
Cruising area: solent
Join Date: Nov 2009
Location: Berkshire
Posts: 28
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Yep Tony you were right prop fitted with metal flo torq. However guy has checked it out and reckons he can see absolutely nothing wrong with it. He says engine is set quite high and in his opinion it is definately cavitation, many thanks for advice, much appreciated.
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16-04-2010, 04:37 PM
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#29
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Registered User
Country: Belgium
Location: near Ghent
Occupation: engineer
Interests: boating, wakeboarding, snowboarding, fitness
Boat name: Outlaw
Boat make: Phantom 21ft
Engines: Yamaha 200hp
Cruising area: Zele / Kanaal Gent-Terneuzen
Join Date: Jun 2006
Location: near Ghent
Posts: 473
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You can make a small mark on the bush and prop before you go out on the water. When it's still "in-line" afterwards, you don't have a problem with the bush.
some nice Flo torq hub pics and info ->
http://web.continuouswave.com/ubb/Fo...ML/005155.html
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16-04-2010, 08:32 PM
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#30
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Registered User
Country: uk
Location: Berkshire
Boat name: Apparition
Boat make: Phantom 21
Engines: merc 2.5 280
Cruising area: solent
Join Date: Nov 2009
Location: Berkshire
Posts: 28
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Thanks for that tip mate. I see on another thread you were talking about fitting solid venthole plugs to try and reduce your cavitation problems, this has been suggested to me so just wondered how you got on with them and if they are worth a go
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17-04-2010, 12:47 AM
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#31
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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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after reading all your comments i'd go out again as it is and make sure you trim in all the way before trying to accellerate hard when off the plane
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17-04-2010, 09:11 AM
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#32
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Registered User
Country: UK
Location: Windermere
Join Date: Oct 2005
Location: Windermere
Posts: 559
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So the 280 is a pretty aggressive motor, the ECU is of a very different type to previous versions. If you put a lot of fuel in the engine which you did by it not starting and cooling slightly so it dropped on the enrichment curve the engine will take a little time to catch back up as the fuelling will be way out but the engine is capable of using the excess fuel something a standard carb motor probably couldn't do and so will perform quite differently to what you are used to. So not wanting to hijack the thread but while the prop bush ideas are very relevant why do you guy's all use and recommend the laser props. Have they changed a lot over the years ? Is it just because they are a good "allrounder" because to be honest I always thought them pretty crap. I read time after time threads saying I only get 50mph yet there are loads of people recommending a pretty average propeller which isn't well suited to high heights or high power operation.
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17-04-2010, 09:28 AM
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#33
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Registered User
Country: uk
Location: Berkshire
Boat name: Apparition
Boat make: Phantom 21
Engines: merc 2.5 280
Cruising area: solent
Join Date: Nov 2009
Location: Berkshire
Posts: 28
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Sound advice mate will defo take out for couple more runs before doing anything
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18-04-2010, 12:10 PM
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#34
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Registered User
Country: Belgium
Location: near Ghent
Occupation: engineer
Interests: boating, wakeboarding, snowboarding, fitness
Boat name: Outlaw
Boat make: Phantom 21ft
Engines: Yamaha 200hp
Cruising area: Zele / Kanaal Gent-Terneuzen
Join Date: Jun 2006
Location: near Ghent
Posts: 473
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Hi Slybadger, I didn't found the time to test with the venthole plugs... to be honest they are still not delivered . My expectation is they will make a huuuugge difference !! But only at the start, once you are up to speed venthole plugs solid or empty make no difference.
Don't know how you did your prop selection. I give you my advice. My prop experience is very limited, but I can tell you this : it's very very important. "Try before you buy" is crucial. And in the end it all comes down to what you want and how pleased you are with the testresult : all round performance, towing a skier, good acceleration, good top end...
Fact : your Phantom 21 needs bowlift. This means you'll need a prop that gives bowlift. Absolutely no cleaver props as they give sternlift. Calculate your needed pitch and ask around what other people with P21 280's did... A lot depends on how much revs you allow your 280 to make...
- My Tempest Plus 25 could work fine on my P21 with 200hp, but as said I still have to test.
-I got also the advice a Mercury Fury prop is great and will surely outrun my Tempest on top end. I'dd probably will be able to turn a pitch 26 in my case... It only exists since beginning of 2008, but I've heard great things about it, from people how've tested it on a P21.
- You can also trie a good chopper prop. Friend of mine is absolutely happy with his chopper 26 on his Ring21 with 200hp. Immense difference. Fact is you have to learn how to drive it best, so experiment with the trim as Burty says. I'll try my friend's chopper on my P21 when have the chance...
Hope this helps
T.
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18-04-2010, 01:36 PM
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#35
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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
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We've had great success with cleavers over here on phantoms, especially in the rough, kept it really nice and level.
James
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18-04-2010, 09:31 PM
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#36
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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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If you were feeling no "issues" before the flooding problem I can't see why a spun prop hub would be investigated and become suspect. I build many 280,260, Drags etc a month and according to the use and abuse as well as the oil used a recreational 280 "can" go 140 hours on a rebuild, more abuse and rpms the less time in between re ringing. I use a leak down tester on all coated sleeved 2.5 to determine ring/bore health. I go no more leak down % than 6 % on a race engines and 8-10% on recreational ones.. IMO Top pinning is a MUST on all the 2.5 engines and I find that Wizards pistons are FAR better than OEM's and rings for rebuilds are 1/2 price as OEM parts.
Marking the prop barrel as well as the hub and make a test run to see if there is movement is a great suggestion...
Cheers,
Jay
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18-04-2010, 10:18 PM
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#37
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Registered User
Country: Belgium
Location: near Ghent
Occupation: engineer
Interests: boating, wakeboarding, snowboarding, fitness
Boat name: Outlaw
Boat make: Phantom 21ft
Engines: Yamaha 200hp
Cruising area: Zele / Kanaal Gent-Terneuzen
Join Date: Jun 2006
Location: near Ghent
Posts: 473
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Quote:
Originally Posted by larby
We've had great success with cleavers over here on phantoms, especially in the rough, kept it really nice and level.
James
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That's the first time I've heard of this... but OK, my experience is limited and I'll be happy to test a cleaver some day
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19-04-2010, 08:12 AM
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#38
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Registered User
Country: Belgium
Interests: waterski Racing
Boat make: Bernico 19X, Bernico F2 Xtreme
Engines: 150 optimax, 300XS
Join Date: Mar 2006
Posts: 20
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Quote:
Originally Posted by Toffy
That's the first time I've heard of this... but OK, my experience is limited and I'll be happy to test a cleaver some day
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I had good results with a trophy plus 23P on a 2.5 280, it's a good allround prop, if you want a good high end top speed, you will need a chopper
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