Boatmad.com


Reply
 
Thread Tools Display Modes
 
Old 19-01-2010, 07:27 PM   #1
Registered User
 
Tony Davis's Avatar
 
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
Marathon Rules

Can anyone point me in the right direction for a copy of this weeks marathon rules, and who'd be in a position to give a ruling on engine eligibility. I don't want an opinion, but an answer, in writing if possible.

Also, does anyone know if the intention is to weigh each of the boats, and if it's likely to strip motors to see if they/it meet the rules?
__________________

__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-01-2010, 08:14 PM   #2
Registered User
 

Join Date: Oct 2007
Posts: 1,374
Quote:
Originally Posted by Tony Davis View Post
Can anyone point me in the right direction for a copy of this weeks marathon rules, and who'd be in a position to give a ruling on engine eligibility. I don't want an opinion, but an answer, in writing if possible.

Also, does anyone know if the intention is to weigh each of the boats, and if it's likely to strip motors to see if they/it meet the rules?
If they start stripping my engines then were out.
Not cause i've tweaked them ( as if i had the cash i wouldn't waist it ) but in my taxi business expertise once you take the heads off a thrashed engine there fu--
__________________

hunton69 is offline   Reply With Quote
Old 19-01-2010, 08:23 PM   #3
TEAM 25 RACING
 
BigBird1964's Avatar
 
Country: UK
Location: By the seaside
Occupation: Designing stuff
Cruising area: Solent

Join Date: Jul 2007
Location: By the seaside
Posts: 508
Don't worry Barry, your engines have never been thrashed, they'll be fine
__________________
I used to live with fear every day, then I divorced her
BigBird1964 is offline   Reply With Quote
Old 19-01-2010, 08:31 PM   #4
Registered User
 
Ciao's Avatar
 
Country: England
Location: Great Horwood

Join Date: Mar 2005
Location: Great Horwood
Posts: 2,372
Send a message via Skype™ to Ciao
Marathon Rules

http://www.britishpowerboatracingclu...k/marathon.htm
Ciao is offline   Reply With Quote
Old 19-01-2010, 08:48 PM   #5
Registered User
 
Tony Davis's Avatar
 
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
OK, that's helpful....

So how do the motors like the 300XS of Calcutt and Hook fit with this?

http://www.mercuryracing.com/outboards/
Attached Thumbnails
Click image for larger version

Name:	race motor.jpg
Views:	177
Size:	17.4 KB
ID:	23032  
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-01-2010, 08:50 PM   #6
Registered User
 
Tony Davis's Avatar
 
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
And if I have a pair of "wanked out" old 6.2's, then I take it I can re bore them 30 thou and make them into 6.3's?
Attached Thumbnails
Click image for larger version

Name:	30.jpg
Views:	158
Size:	11.8 KB
ID:	23033  
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-01-2010, 10:17 PM   #7
Senior Member
 
OCRDA's Avatar
 
Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France

Join Date: Jan 2005
Location: Devon
Posts: 3,095
Quote:
Originally Posted by Tony Davis View Post
OK, that's helpful....

So how do the motors like the 300XS of Calcutt and Hook fit with this?

http://www.mercuryracing.com/outboards/
I recon its 1x 300xs "E" Class
2 x 300xs C Stock
3 x 300xs C Sport
__________________
If Only
National Outboard Immersed Propeller Mono Record 103mph
OCRDA is offline   Reply With Quote
Old 19-01-2010, 10:21 PM   #8
Senior Member
 
OCRDA's Avatar
 
Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France

Join Date: Jan 2005
Location: Devon
Posts: 3,095
Quote:
Originally Posted by Tony Davis View Post
And if I have a pair of "wanked out" old 6.2's, then I take it I can re bore them 30 thou and make them into 6.3's?
Presumably this takes you from D class to C Stock !! assuming they are Normally aspirated petrol motors!!
__________________
If Only
National Outboard Immersed Propeller Mono Record 103mph
OCRDA is offline   Reply With Quote
Old 19-01-2010, 10:37 PM   #9
Registered User
 
Tony Davis's Avatar
 
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
Quote:
Originally Posted by OCRDA View Post
I recon its 1x 300xs "E" Class
2 x 300xs C Stock
3 x 300xs C Sport
But the rules clearly say... "Engines should be from the pleasure line, not the race line of engines from any manufacturer".... as shown below!!!!!
Attached Thumbnails
Click image for larger version

Name:	race motor.jpg
Views:	151
Size:	17.4 KB
ID:	23034  
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-01-2010, 10:39 PM   #10
Moderator
 
Mike Lloyd's Avatar
 
Country: England
Location: Cornwall.
Occupation: Retired.
Interests: Golf & liquid lunches with friends.

Join Date: Mar 2006
Location: Cornwall.
Posts: 2,303
Quote:
Originally Posted by Tony Davis View Post
Can anyone point me in the right direction for a copy of this weeks marathon rules, and who'd be in a position to give a ruling on engine eligibility. I don't want an opinion, but an answer, in writing if possible.

Also, does anyone know if the intention is to weigh each of the boats, and if it's likely to strip motors to see if they/it meet the rules?
Re engine eligibilty, JF is your answer, also, I think we have covered the 6.2 to 6.3 problem before somewhere here.

So far Marathon has been fairly free and easy as those racing appear to be fairly easy going about the rules. However, as the World Cup is going to be an International Race of some importance the RYA will insist in all boats being measured and weighed. Those that raced in RB08 and Cowes 08 will be let off being too light or their engines obsolete because of the Grandfather rule until Jan 2012 which again we have covered somewhere here before.
ML.
.
Mike Lloyd is offline   Reply With Quote
Old 19-01-2010, 10:43 PM   #11
Senior Member
 
OCRDA's Avatar
 
Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France

Join Date: Jan 2005
Location: Devon
Posts: 3,095
Quote:
Originally Posted by Tony Davis View Post
But the rules clearly say... "Engines should be from the pleasure line, not the race line of engines from any manufacturer".... as shown below!!!!!
But its only the 3 on top row that are "Race" Motors and not the std Opti's
Could'nt use 200xs or 60 !!

Bob
__________________
If Only
National Outboard Immersed Propeller Mono Record 103mph
OCRDA is offline   Reply With Quote
Old 19-01-2010, 10:44 PM   #12
Registered User
 
Tony Davis's Avatar
 
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
Quote:
Originally Posted by OldMan View Post
I think we have covered the 6.2 to 6.3 problem before somewhere here.
.
Where's that then?

The rules clearly state Class D is 12.5 litres for a twin installation, but also says you can have a 30 thou rebore, so I assume you can end up with a pair of 6.3 litre smallblocks and be legal???
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-01-2010, 10:44 PM   #13
blind dog
 
blind dog's Avatar
 
Country: uk
Location: fast land
Occupation: going fast
Interests: fast
Boat name: drivers dry berthing
Boat make: buzzi
Cruising area: anywhere fast

Join Date: Mar 2007
Location: fast land
Posts: 828
marathon rules

according to the mercury web site the xs is for the sporty boater and comes with a warrenty which the race engines dont so i reckon there allowed
blind dog is offline   Reply With Quote
Old 19-01-2010, 10:49 PM   #14
Registered User
 
Tony Davis's Avatar
 
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
Quote:
Originally Posted by OCRDA View Post
But its only the 3 on top row that are "Race" Motors and not the std Opti's
Could'nt use 200xs or 60 !!

Bob
I see where your coming from Rob, but the website url is quite clearly "mercury racing", and the motors are built by "mercury racing"....

"OptiMax 300XS
The World's Most Powerful 2-Stroke Low Emissions Outboard.

Mercury Racing is all about passion for perfection and the pursuit of peak performance. We have a reputation of exceeding consumer expectations in product quality and performance - something we've carried forward from the late Carl Kiekhaefer, Mercury Racing president Fred Kiekhaefer's father and founder of Mercury Marine. The all-new OptiMax 300XS outboard continues our heritage of delivering more power and performance than competitors with the same horsepower rating".....

"As with the complete line of Mercury Racing OptiMax XS outboards, the 300XS comes with a heavy-duty direct fuel injection air compressor featuring robust maxi-coated mounting brackets and hardware for enhanced compressor durability and reliability"
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-01-2010, 10:52 PM   #15
Senior Member
 
OCRDA's Avatar
 
Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France

Join Date: Jan 2005
Location: Devon
Posts: 3,095
Quote:
Originally Posted by Tony Davis View Post
Where's that then?

The rules clearly state Class D is 12.5 litres for a twin installation, but also says you can have a 30 thou rebore, so I assume you can end up with a pair of 6.3 litre smallblocks and be legal???
Which motors are you refering to ?? It is very unusual for any to be exactly 6250cc !! I guess that the measurer would measure Bore & Stroke and if more than 12500cc you get Dq'd

Bob
__________________
If Only
National Outboard Immersed Propeller Mono Record 103mph
OCRDA is offline   Reply With Quote
Old 19-01-2010, 10:55 PM   #16
Registered User
 
Tony Davis's Avatar
 
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
6.2 litre mercruiser, bored 30 thou makes it a 6.3 litre.
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-01-2010, 10:57 PM   #17
blind dog
 
blind dog's Avatar
 
Country: uk
Location: fast land
Occupation: going fast
Interests: fast
Boat name: drivers dry berthing
Boat make: buzzi
Cruising area: anywhere fast

Join Date: Mar 2007
Location: fast land
Posts: 828
marathon rules

300xs. under recomended uses it states several uses but doesnt mention racing,kinda like when you wanted to buy a ford cosworth you could only buy from a ford motor sport dealer but that didnt mean it was a race car
blind dog is offline   Reply With Quote
Old 19-01-2010, 10:59 PM   #18
Senior Member
 
OCRDA's Avatar
 
Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France

Join Date: Jan 2005
Location: Devon
Posts: 3,095
Quote:
Originally Posted by Tony Davis View Post
I see where your coming from Rob, but the website url is quite clearly "mercury racing", and the motors are built by "mercury racing"....

"OptiMax 300XS
The World's Most Powerful 2-Stroke Low Emissions Outboard.

Mercury Racing is all about passion for perfection and the pursuit of peak performance. We have a reputation of exceeding consumer expectations in product quality and performance - something we've carried forward from the late Carl Kiekhaefer, Mercury Racing president Fred Kiekhaefer's father and founder of Mercury Marine. The all-new OptiMax 300XS outboard continues our heritage of delivering more power and performance than competitors with the same horsepower rating".....

"As with the complete line of Mercury Racing OptiMax XS outboards, the 300XS comes with a heavy-duty direct fuel injection air compressor featuring robust maxi-coated mounting brackets and hardware for enhanced compressor durability and reliability"
I see it as the OPTI being std motors but if it is likely to cause a problem then RYA Technical need to confirm this with Mercury.

Bob
__________________
If Only
National Outboard Immersed Propeller Mono Record 103mph
OCRDA is offline   Reply With Quote
Old 19-01-2010, 11:06 PM   #19
Senior Member
 
OCRDA's Avatar
 
Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France

Join Date: Jan 2005
Location: Devon
Posts: 3,095
Quote:
Originally Posted by Tony Davis View Post
6.2 litre mercruiser, bored 30 thou makes it a 6.3 litre.
I did mention at the beginning that the class rules all appeared to complex.

Its a bit like when OCR went 2 litre ! Min boat length was 18' 6" with the exception of Phantom 18 at 18'4" !!

Unfortunately it means that once your 6.2 merc is worn past 6250cc then it don't fit the class anymore. or the rule needs changing to 12.6 Ltr but then what happens if you get 6.3 ltr motors and need to rebore them ??
__________________
If Only
National Outboard Immersed Propeller Mono Record 103mph
OCRDA is offline   Reply With Quote
Old 19-01-2010, 11:08 PM   #20
Registered User
 
Tony Davis's Avatar
 
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
Rob, read paragraph "B" of this.... http://www.britishpowerboatracingclu...ry/classes.pdf
__________________

__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT +1. The time now is 10:20 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
×