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19-06-2008, 10:34 AM
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#1
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Registered User
Country: UK
Location: Windermere
Join Date: Oct 2005
Location: Windermere
Posts: 559
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2.5 280 Ros
A quick word of advice for anybody with a 280 ROS with the new type Motorola ECM. While it may appear to be a sealed unit it isn't and is extremely expensive to replace if it goes swimming. Pull the 3 plugs and you will see a pin is missing out of the 3 connectors in the ECM. I would suggest sealing those 3 holes carefully with silicone sealant. If anybody ever has one that sounds like a portable swimming pool I will post a picture of where to CAREFULLY drill drain holes so it can be drained, filled with WD40 and oven roasted like new.
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19-06-2008, 06:04 PM
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#2
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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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mastic in hand ready
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It is impossible to lick your elbow.
Team25Racing.com 
At least 75% of people who read this will try to lick their elbow!
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19-06-2008, 10:27 PM
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#3
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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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Suggest a non silicone mastic as apparrently electronics are allergic to the acetic acid used to cure silicone.
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If Only
National Outboard Immersed Propeller Mono Record 103mph
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21-06-2008, 09:04 AM
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#4
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Registered User
Country: UK
Occupation: IT Consultant
Boat name: G4, Missconduct
Boat make: DAC, Phantom 18
Engines: Mercury 280 ROS, Mercury 280 + S3000 electrics
Cruising area: Windermere & Barrow
Join Date: Sep 2005
Posts: 67
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Quote:
Originally Posted by Techteam
A quick word of advice for anybody with a 280 ROS with the new type Motorola ECM. While it may appear to be a sealed unit it isn't and is extremely expensive to replace if it goes swimming. Pull the 3 plugs and you will see a pin is missing out of the 3 connectors in the ECM. I would suggest sealing those 3 holes carefully with silicone sealant. If anybody ever has one that sounds like a portable swimming pool I will post a picture of where to CAREFULLY drill drain holes so it can be drained, filled with WD40 and oven roasted like new.
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Oops did you use a non-silicone based sealant or do I need to order a new ECU now?
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22-06-2008, 10:18 AM
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#5
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Registered User
Country: uk
Occupation: Diamond/Jewellery/Rolex dealer
Boat name: Beyond Obsession
Boat make: P25
Engines: merc 2x200XS SSROS
Cruising area: solent/altea
Join Date: Mar 2008
Posts: 311
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Is this the same on a 300x promax or is that a completely different ecu.?cheers nick.
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22-06-2008, 10:22 AM
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#6
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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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Quote:
Originally Posted by nick1
Is this the same on a 300x promax or is that a completely different ecu.?cheers nick.
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Different ecu.
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PLEASE DON'T STEAL...THE GOVERNMENT DON'T LIKE THE COMPETITION
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22-06-2008, 11:18 AM
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#7
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hello
Join Date: Mar 2004
Posts: 2,739
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Quote:
Originally Posted by Techteam
and oven roasted like new.
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70 deg C max!!!
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22-06-2008, 12:21 PM
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#8
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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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Some ovens have a warmer draw - 40 degrees. Other more advanced models have a merangue setting - 45 degrees.
Do not use the microwave setting...
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30-06-2008, 10:30 AM
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#9
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Registered User
Country: UK
Location: Windermere
Join Date: Oct 2005
Location: Windermere
Posts: 559
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So if you use a bit of care and a modicum of common sense you can save a few quid. Still got to try it running but it's amazing when you consider it's been completely submerged in sea water. Sorry the pictures are so bad but the DDT reads static test pass (Relieved Paul ?) and the measurements are 4.4 mm and 13mm with the 0mm on the edge of the silver plate.
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30-06-2008, 11:15 AM
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#10
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Registered User
Country: UK
Occupation: IT Consultant
Boat name: G4, Missconduct
Boat make: DAC, Phantom 18
Engines: Mercury 280 ROS, Mercury 280 + S3000 electrics
Cruising area: Windermere & Barrow
Join Date: Sep 2005
Posts: 67
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Quote:
Originally Posted by Techteam
So if you use a bit of care and a modicum of common sense you can save a few quid. Still got to try it running but it's amazing when you consider it's been completely submerged in sea water. Sorry the pictures are so bad but the DDT reads static test pass (Relieved Paul ?) and the measurements are 4.4 mm and 13mm with the 0mm on the edge of the silver plate.
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Yes very relieved mate Thanks for all your help. Fingers crossed that it will run the motor.
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