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26-09-2006, 08:28 AM
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#21
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Registered User
Country: UK
Location: Coventry (but from Lee on Solent)
Occupation: Sales Director
Interests: My Boat of course
Boat make: Extreme 21
Engines: Merc V8
Cruising area: Solent
Join Date: Jul 2005
Location: Coventry (but from Lee on Solent)
Posts: 587
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Tanks / Pumps etc - two batteries, one either side
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The Docta
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26-09-2006, 12:37 PM
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#22
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Registered User
Country: UK
Location: Coventry (but from Lee on Solent)
Occupation: Sales Director
Interests: My Boat of course
Boat make: Extreme 21
Engines: Merc V8
Cruising area: Solent
Join Date: Jul 2005
Location: Coventry (but from Lee on Solent)
Posts: 587
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Hydraulic steering - seems fine with no play
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26-09-2006, 01:14 PM
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#23
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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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It's all in the leg - it's to low.
I had a 25" leg on a 225Opti P21 and also experienced a lot of "walk" at speeds above 70.. I raised the engine to the highest point (bolt/hole) and it helped a bit but i was seriously leaning over/in while turning - felt like the engine could tip over the boat.!
You also have rubber motormounts that could have alots of play in them..
I changed to a 20" leg and the walk is still there but not servere and loads more controlable - putting on a hydraulic lift later.. Also have solid motormounts..
The reason why your old Ring 18 didn't chine was probably becuase the speed wasn't high enough
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26-09-2006, 02:27 PM
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#24
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Registered User
Country: UK
Location: Coventry (but from Lee on Solent)
Occupation: Sales Director
Interests: My Boat of course
Boat make: Extreme 21
Engines: Merc V8
Cruising area: Solent
Join Date: Jul 2005
Location: Coventry (but from Lee on Solent)
Posts: 587
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Thanks for the advice Lars
Much appreciated mate - not sure about the speed of the ring 18 though - she was running a 200hp 2.4 and felt bloody fast to me - just stable. Fuel tank was bow mounted in the 18 also.
I think that engine height may be the issue though. The prop runs very low in the water similar pic that taz has posted. The bullet is well below the bottom of the hull.
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26-09-2006, 02:31 PM
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#25
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Registered User
Country: UK
Location: Coventry (but from Lee on Solent)
Occupation: Sales Director
Interests: My Boat of course
Boat make: Extreme 21
Engines: Merc V8
Cruising area: Solent
Join Date: Jul 2005
Location: Coventry (but from Lee on Solent)
Posts: 587
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Another engine pic
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The Docta
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26-09-2006, 09:26 PM
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#26
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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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Bullet is too low and the leg/prop is trying to lift the entire hull out of the water.
The bowtank will surely cost you the top end ## - but if you use it in rough water it might be worth it..
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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26-09-2006, 09:29 PM
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#27
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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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my P21
__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
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27-09-2006, 07:23 PM
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#28
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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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Sell the engine mate get something else i wouldnt waste any time or money i learnt the hard way
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27-09-2006, 07:43 PM
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#29
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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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I agree with taz.. i also sold my 25"..
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27-09-2006, 08:52 PM
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#30
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Registered User
Country: England
Location: Crayford, Kent.
Occupation: Electrical gezza!
Interests: Petrolhead
Boat name: Wayne Kerr
Boat make: Phantom xl
Engines: Mercury 2.5, 200(ish)
Cruising area: Essex, Hampshire, Mediterranean
Join Date: Sep 2004
Location: Crayford, Kent.
Posts: 1,199
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I've got a 20" offshore mid section that is surplus to my requirements if you need one.
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27-09-2006, 10:16 PM
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#31
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Registered User
Country: Scotland
Location: Kirkcudbright
Interests: Boats n Lambrettas
Boat make: Boatless
Join Date: Mar 2004
Location: Kirkcudbright
Posts: 978
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What do you want for it ? I'm interested.
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28-09-2006, 08:31 AM
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#32
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Registered User
Country: UK
Location: Coventry (but from Lee on Solent)
Occupation: Sales Director
Interests: My Boat of course
Boat make: Extreme 21
Engines: Merc V8
Cruising area: Solent
Join Date: Jul 2005
Location: Coventry (but from Lee on Solent)
Posts: 587
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Hi Wayne
Will a 20" offshore mid fit a 250 coscast? If so please pm me details - Cheers
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28-09-2006, 08:53 AM
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#33
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Registered User
Country: England
Location: South West
Occupation: Development engineer
Interests: Fast boats
Boat name: Xtreme
Boat make: Bernico 21
Engines: Mercury F1, 300 Drag, XR2 "Fingerported"
Cruising area: South West
Join Date: Mar 2004
Location: South West
Posts: 1,043
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No it won't fit.
Your block has a diffenrent stud pattern.
You could look on Scream and fly for a 15 or even 12" midsection, I have seen a few on there in the past.
You could also cut down your mid section and have your gear box input shaft cut and re-splined.
This would need to be done by a very good fabricator in order to maintain the strength, I would also try using the saddle from a 20" offshore mid section to save modifiying yours.
Cyco
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28-09-2006, 08:54 AM
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#34
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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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Quote:
Originally posted by The Docta
Hi Wayne
Will a 20" offshore mid fit a 250 coscast? If so please pm me details - Cheers
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No it won't dude, you have to get a special one prolly from the states but they are as rare as rocking horse poo poo
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28-09-2006, 04:22 PM
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#35
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Registered User
Country: England
Location: South West
Occupation: Development engineer
Interests: Fast boats
Boat name: Xtreme
Boat make: Bernico 21
Engines: Mercury F1, 300 Drag, XR2 "Fingerported"
Cruising area: South West
Join Date: Mar 2004
Location: South West
Posts: 1,043
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Is there an Echo in here?
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28-09-2006, 04:24 PM
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#36
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Registered User
Country: England
Location: South West
Occupation: Development engineer
Interests: Fast boats
Boat name: Xtreme
Boat make: Bernico 21
Engines: Mercury F1, 300 Drag, XR2 "Fingerported"
Cruising area: South West
Join Date: Mar 2004
Location: South West
Posts: 1,043
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Try taking the battery on the passenger side out.
Why is there 2 batterys in there?
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28-09-2006, 06:10 PM
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#37
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Registered User
Country: Scotland
Location: Kirkcudbright
Interests: Boats n Lambrettas
Boat make: Boatless
Join Date: Mar 2004
Location: Kirkcudbright
Posts: 978
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Quote:
Originally posted by mike k
What do you want for it ? I'm interested.
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??????????
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28-09-2006, 06:12 PM
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#38
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Registered User
Country: Scotland
Location: Kirkcudbright
Interests: Boats n Lambrettas
Boat make: Boatless
Join Date: Mar 2004
Location: Kirkcudbright
Posts: 978
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P21
Lars, you're P21 looks the dogs...
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28-09-2006, 06:41 PM
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#39
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Registered User
Country: Norway
Location: Lillesand
Occupation: Director
Boat make: Phantom 25
Engines: 2 x Merc 2.5 EFI SS
Cruising area: Southern Norway
Join Date: Apr 2004
Location: Lillesand
Posts: 58
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Re: P21
Hi!
I am also more or less sure the xl midsection making a problem. The propshaft is very low, and at this low point, the prop makes lot of torque. If possible, I would buy a powerlift with 4-5 inch of setback. Then you play with engine height and get control over the chinewalk. Typical proshaft height will be 2-2,5 inches below. Now it seems to be 4-5 inches below.
I had a 25 inch midsections for some few months on my Promax 300, and the boat chinewalked a little despite using powerlift. I could not get the engine high enough. I swopped to a 20 inch midsection, jacked up the propshaft to 2 inches below. Running on rails. However, I have a P25 so its may be a different story.
Good luck!
Cheeeers, Toffen G
Quote:
Originally posted by mike k
Lars, you're P21 looks the dogs...
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28-09-2006, 07:42 PM
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#40
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Registered User
Country: England
Location: Crayford, Kent.
Occupation: Electrical gezza!
Interests: Petrolhead
Boat name: Wayne Kerr
Boat make: Phantom xl
Engines: Mercury 2.5, 200(ish)
Cruising area: Essex, Hampshire, Mediterranean
Join Date: Sep 2004
Location: Crayford, Kent.
Posts: 1,199
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Quote:
Originally posted by mike k
What do you want for it ? I'm interested.
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Call me mate, been bashing me ankles for far too long now.
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