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12-09-2004, 02:56 PM
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#1
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Live for today, not 2moro
Country: United Kingdom
Location: South Coast
Occupation: Builder/Property Development
Interests: Racing
Boat name: Black Thunder
Boat make: Cougar
Engines: Rude 250HO
Cruising area: Solent/Anywhere
Join Date: Sep 2004
Location: South Coast
Posts: 382
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Someone Help me with a Mercury XR2!!
We have just bought this K4+pluus 2litre boat, rigged with a Mercury XR" on the back. We have just spent weeks getting the boat up and running. We took the boat out over the weekend and we were going up the river and when we went to accelerate past 1500rpm the engine cuts out! When it is in Neutral it revs and works fine. With the prop off and in gear and reving it works fine. But when you have the prop on and in gear it will not accelerate past 1500rpm without dying on me. Whether it is fuel starvation or anything else i would like some feedback or any for of solution on this problem may be fixed ASAP as Cardiff is fast approaching.
Cheers 
Will Nurse
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12-09-2004, 04:07 PM
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#2
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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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have you done a compression test on the cylinders?
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12-09-2004, 04:38 PM
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#3
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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Sounds like the first port of call should be to check main jets for blockage(s), and float heights.
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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12-09-2004, 09:10 PM
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#4
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Live for today, not 2moro
Country: United Kingdom
Location: South Coast
Occupation: Builder/Property Development
Interests: Racing
Boat name: Black Thunder
Boat make: Cougar
Engines: Rude 250HO
Cruising area: Solent/Anywhere
Join Date: Sep 2004
Location: South Coast
Posts: 382
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Well we hope that is all bin done because the engine has just bin re-built by Clive Jones so it should all be working, and it shoould all be set correctly! That is what we hope anyway. Cheers for the response so far if there are any more suggestion i would be grateful.
Will Nurse
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12-09-2004, 09:40 PM
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#5
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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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Those are also symptoms of a number of other problems such as the stator / triggerpartial failure or something simple such as water in the fuel. Is it running an electric or pulse pump? Fuel pressures are critical on XR2's!
If it was just rebuilt then I would take it back and complain!
Good luck!
ps you do know the race has been reclassified and is now a national in Cardiff?
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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12-09-2004, 09:45 PM
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#6
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Live for today, not 2moro
Country: United Kingdom
Location: South Coast
Occupation: Builder/Property Development
Interests: Racing
Boat name: Black Thunder
Boat make: Cougar
Engines: Rude 250HO
Cruising area: Solent/Anywhere
Join Date: Sep 2004
Location: South Coast
Posts: 382
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Cheers for that, the fuel pump is a manual no electric fuel pump or anything. Is one recommended? by the sounds of things is it is!! In the Cardiff race instructions there is a basic race for Class 3 and Ribs on the Sunday? If that is cancelled, bugger!
Cheers for all these suggestions.
Will Nurse
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12-09-2004, 09:53 PM
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#7
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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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Don't think there are any "official" race instructions yet anyway - where did yours come from?
I have always run a manual pump - I also have a rebuild kit for one, and if your diaphram is nackered it won't pump a lot of fuel!
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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13-09-2004, 08:53 AM
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#8
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Registered User
Location: hayling island
Boat name: snow monkey
Boat make: extreme 24
Engines: mercruiser 6.2
Join Date: May 2004
Location: hayling island
Posts: 2,082
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two things.....................if you have changed the prop it could now be over proped,or maybe one of the switch boxes
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13-09-2004, 12:09 PM
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#9
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Registered User
Location: Scotland
Interests: Hole maker
Boat make: Humber Ocean Offshore
Engines: KAD 300/DPX
Join Date: Mar 2004
Location: Scotland
Posts: 958
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You don't need a DVA meter, just a wee circuit which stores the voltage long enough for a multi meter to read it. Connect it between the lead you are checking and ground. The resistors are 560k and the diode is a 1n4007. Values are not critical.
Here's one I made earlier, seven years earlier. 
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JW.
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13-09-2004, 12:20 PM
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#10
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Registered User
Location: Scotland
Interests: Hole maker
Boat make: Humber Ocean Offshore
Engines: KAD 300/DPX
Join Date: Mar 2004
Location: Scotland
Posts: 958
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Forgot to say... connect the meter across the capacitor positive/Ground.
Could do with a bit longer to edit me mistakes. It takes me brain far longer than that to realise I've made 'em.
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JW.
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13-09-2004, 01:42 PM
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#11
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Live for today, not 2moro
Country: United Kingdom
Location: South Coast
Occupation: Builder/Property Development
Interests: Racing
Boat name: Black Thunder
Boat make: Cougar
Engines: Rude 250HO
Cruising area: Solent/Anywhere
Join Date: Sep 2004
Location: South Coast
Posts: 382
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Cheers guys for all of this assistance. What we have done is spoken to Chris Lewis and he hasa said the same sort of thing, so what we are going to do is take it down to him and he is going to srtip it and sort the problem! Woopie!
Cheers
Will Nurse
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22-09-2004, 09:10 PM
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#12
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Registered User
Location: poole dorset
Join Date: Mar 2004
Location: poole dorset
Posts: 868
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Sorry for the late post but have just got back from italy. We have had the same sort of symptom on our xr2 and the simple way round it is to give it one or two pumps on the choke when it starts to bor down. works everytime!!! If CJ has done your engine it will be a cracker. I know the workshop looks like a tip but he does know his stuff, also a lot cheaper than Cobbs Quay.
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22-09-2004, 09:11 PM
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#13
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Registered User
Location: poole dorset
Join Date: Mar 2004
Location: poole dorset
Posts: 868
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That should read BOG!!
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22-09-2004, 09:24 PM
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#14
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Registered User
Country: Wales
Location: Southampton
Occupation: boat driver/Instructor
Interests: boats , laughing and music
Boat name: Dyna Mo Humm
Boat make: Avon Searider 8.4mmmm
Engines: Cat 4216 450hp
Cruising area: Solent
Join Date: Mar 2004
Location: Southampton
Posts: 983
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Quote:
Originally posted by jw.
Forgot to say... connect the meter across the capacitor positive/Ground.
Could do with a bit longer to edit me mistakes. It takes me brain far longer than that to realise I've made 'em.
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we used to be able yo up until the night of the long knives! 
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when I grow up I wanna be Tony Davis
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23-09-2004, 05:44 PM
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#15
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Registered User
Country: UK
Location: Thorpe Bay
Occupation: IT Director, www.lighthouseit.co.uk
Interests: Boats, Surfing & Snowboarding
Boat name: Isabella / Cool Runnings II / Bella / Sea Pup / Sea Dog / Speedy II / Bernico F3
Boat make: Colvic 35 Suncruiser / Bernico F3 / Phantom 16 / Zodiac 420 YL / RIB / Apollo 9
Engines: 2 x Perkins Sabre 225ti / Mercury Pro XS /Mercury Pro XS 115/ Tohatsu 2.5 / Mercury 25 / Mercury 50
Cruising area: Thames Estuary / River Crouch / Salcombe
Join Date: Jun 2004
Location: Thorpe Bay
Posts: 932
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I agree with CB1 hit the chock a couple of times, once normally solves it on mine. This only happens every now and then. I have heard that this is pretty par for the course with the XR2.
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Loving the Spitfire with a 25HP Mercury
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23-09-2004, 06:09 PM
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#16
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The Doc
Join Date: Mar 2004
Posts: 8,291
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workshop
Quote:
Originally posted by CB1
I know the workshop looks like a tip.
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Well I couldnt find a workshop amoungst the landfill site 
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23-09-2004, 07:58 PM
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#17
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Registered User
Location: poole dorset
Join Date: Mar 2004
Location: poole dorset
Posts: 868
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Then you did'nt try hard enough!!! 
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