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22-04-2008, 04:40 PM
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#1
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Registered User
Join Date: Nov 2006
Posts: 49
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Boat Bungee Straps?
Does anyone know where i can get a bungee strap to go around the leg of my outboard?
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22-04-2008, 05:07 PM
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#2
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Registered User
Country: England
Location: Kent
Occupation: Train Engineer
Interests: Refit/Re-engine Woody's P18 and helping with D2S.
Boat name: Fugazi II / D2S
Boat make: Phantom 18 / Planatec 41'
Engines: 1xMercury XR2 / 2x 8.1ltr Chevys
Cruising area: Kent/Hampshire/Dorset Coasts
Join Date: Aug 2005
Location: Kent
Posts: 411
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B & Q do it. Or some motor factors that deal with commercials. It is also used for roping and sheeting on trucks..
G.
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22-04-2008, 06:14 PM
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#3
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Registered User
Country: United kingdom
Location: West Sussex
Occupation: Grease Monkey
Interests: Makin my boat faster!
Boat name: S.B Racing
Boat make: Ocke mannerfelt canopied B23 / Zapcat
Engines: Merc 200XS Gen 2 / Tohatsu 50
Cruising area: littlehampton/Southampton
Join Date: Jan 2005
Location: West Sussex
Posts: 2,656
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Any good chandlery or they even sell it on ebay in black at a cheap price. U want 8mm really.
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Class 3C Mono EPA National speed record holder 95.35 mph Avg!
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22-04-2008, 10:52 PM
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#4
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Registered User
Country: Norway
Location: Oslo, Aberdeen
Occupation: Time
Interests: a lot...
Boat make: Gilbert 22 Offshore Edition
Engines: Merc
Cruising area: Oslofjord-Sweden-Denmark
Join Date: Jan 2007
Location: Oslo, Aberdeen
Posts: 232
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Maybe a silly question, but why do you need these bungees if you got powertrim? Think ive heard it before, just forgot it.. Thanks
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23-04-2008, 09:07 AM
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#5
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Registered User
Join Date: Nov 2006
Posts: 49
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No i mean is there a marine "ready made Bungee" on the market?
Cheers
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23-04-2008, 09:25 AM
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#6
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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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I've been wondering this too, why do people do that with bungees?
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23-04-2008, 09:55 AM
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#7
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Registered User
Location: devon
Join Date: Mar 2004
Location: devon
Posts: 556
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It holds the leg back tight against the hydraulics and takes any slack out of the system which helps to prevent hammering.
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23-04-2008, 04:02 PM
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#8
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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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ahh, cunning!! That 'hammering' effect had bothered me in the past... never put two and two together to realise this is why they do it! Think i might do this on my cat... may save killing the engine mounts as i did on the ring!
Thanks Kitten!
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24-04-2008, 12:23 AM
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#9
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Registered User
Country: UK
Boat make: Phantom21
Engines: Mercury 2.5 EFI O/S
Join Date: Feb 2008
Posts: 17
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"takes any slack out of the system which helps to prevent hammering. "
Surely there shouldn't be ANY slack in the engine mounts?
Using a bungee is covering up the real problem - i.e. worn mounts, hydraulics, bushes?
Never had a problem "hammering" on my 2.5 Efi 260.
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24-04-2008, 08:26 AM
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#10
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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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Long time ago in a galaxy far far away when the first XR2 came out there was a change in the design of the ram system. Old 175 was fine with it\'s twin rams but the 150 suffered a bit of sloppyness. It was last selection dependant. so if you were trimming in it was fine no play, trimming out it would have small movement. No amount of rebushing , bleeding, ect would remove it. I would make a trim selection just over running a tad then triming in to the desired setting, Hyd then held it in place with no slop.
This may or not be valid still but mention for info
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24-04-2008, 09:46 AM
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#11
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Senior Member
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
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Not required on most good merc hi perf legs (unless you have a boat that can out handle the saddle,then it helps)
But most of the good engines have bad saddles and the trim does not hold leg down so we add bungy !! Get good quality from a chandlers at least 8mm dia !! It does work very well.
Bob
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If Only
National Outboard Immersed Propeller Mono Record 103mph
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24-04-2008, 01:53 PM
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#12
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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: 4,638
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Quote:
Originally Posted by OCRDA
unless you have a boat that can out handle the saddle,then it helps
Bob
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Referring to anyone in particular Bob? ........ and 130's on a snow plough?!?!?!?!
Mr Rocksteadycrew - Ah the elusive search for 100% perfect engineering - please forward the name of your engineer!
In all seriousness in a mono RIB designed for proper offshore conditions like ours you can easily drive the boat very hard indeed - my navigator can confirm this! - even the slightest movement (given normal engineering tolerances) will get shown up, and if you can reduce that by even the smallest amount then it's worth it.
IMHO a total waste of time in normal leisure use - just puts extra wear on the trim pump!
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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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24-04-2008, 04:07 PM
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#13
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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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Quote:
Originally Posted by Cookee
IMHO a total waste of time in normal leisure use - just puts extra wear on the trim pump!
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On second thoughts, maybe i won't try that then! Saying that, my XR does seem to have rather a large amount of slack on it's mounts... it is getting on a bit now!
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25-04-2008, 12:49 AM
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#14
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Large member
Country: England
Location: On the farm
Occupation: General Trouble Causer Salterns Boatyard
Interests: Official smartass
Boat name: Seahorse.org
Boat make: a V24 and a SLOW unstable ICE Bladerunner
Engines: 2x300 promax, 320 Volvo
Cruising area: England/France & Med
Join Date: May 2005
Location: On the farm
Posts: 2,681
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Quote:
Originally Posted by Cookee
Referring to anyone in particular Bob?
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Only one bannana who breaks the saddle I know of.....
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30-04-2008, 05:53 PM
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#15
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Registered User
Country: USA
Location: Maryland
Occupation: Links Marine
Interests: Fast Boats
Boat make: Outerlimits
Engines: Keith Eickert 1100's
Cruising area: Chesapeake Bay
Join Date: Mar 2008
Location: Maryland
Posts: 30
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If you are running in Offshore conditions you want to bungee the motor regardless of what make it is, It keeps everything in check from hammering as posted previously, I also recommend 9/16" mounting bolts made from (174PH) hardened stainless steel instead of the 1/2"! Also double if not triple the bolts on the bottom of the clamp, Two of the bolts (One on each side) incorporating a SS I bolt for your bungee to attach. Would not hurt to double the top bolts if room to do so.
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30-04-2008, 06:06 PM
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#16
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Registered User
Country: USA
Location: Maryland
Occupation: Links Marine
Interests: Fast Boats
Boat make: Outerlimits
Engines: Keith Eickert 1100's
Cruising area: Chesapeake Bay
Join Date: Mar 2008
Location: Maryland
Posts: 30
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When your heading toward the checkerd flag you dont want a broken clamp bracket slowing you down!!
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01-05-2008, 08:15 AM
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#17
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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: 4,638
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Quote:
Originally Posted by Links
If you are running in Offshore conditions you want to bungee the motor regardless of what make it is, It keeps everything in check from hammering as posted previously, I also recommend 9/16" mounting bolts made from (174PH) hardened stainless steel instead of the 1/2"! Also double if not triple the bolts on the bottom of the clamp, Two of the bolts (One on each side) incorporating a SS I bolt for your bungee to attach. Would not hurt to double the top bolts if room to do so.
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Interesting lifters in photo 3 - what make are they and which boat do you run them on with what motors?
Oh yes last question are they reliable?!?!?!
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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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06-05-2008, 07:59 PM
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#18
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Registered User
Country: USA
Location: Maryland
Occupation: Links Marine
Interests: Fast Boats
Boat make: Outerlimits
Engines: Keith Eickert 1100's
Cruising area: Chesapeake Bay
Join Date: Mar 2008
Location: Maryland
Posts: 30
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Quote:
Originally Posted by Cookee
Interesting lifters in photo 3 - what make are they and which boat do you run them on with what motors?
Oh yes last question are they reliable?!?!?!
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That is one unit and it is bullet proof!! Triple Merc 280's on a 320 Velocity, It is a Porta Bracket, they make a single engine bracket or as wide as you can bolt to the back of the boat!
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06-05-2008, 11:17 PM
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#19
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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 Links
That is one unit and it is bullet proof!!
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I wouldn't say something like that unless Cookee has tested it as he is pretty good at breaking lifters and saddles
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07-05-2008, 09:36 PM
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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: 4,638
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Quote:
Originally Posted by Burty
I wouldn't say something like that unless Cookee has tested it as he is pretty good at breaking lifters and saddles
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Thanks for the Burty!
Yes it is true that I am a bit of an equipment tester!
Links has that triple rig been raced? Leisure use is a lot easier on equipment, once it's been run flat out in a force 4 to 5 for 80 miles in the ocean with no signs of damage then it's bulletproof!
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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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