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28 November 2004, 20:51
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#1
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Member
Country: UK - England
Town: Christchurch
Boat name: Sha-my-sha-my
Make: Valiant
Length: 4m +
Join Date: May 2004
Posts: 167
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Suzuki DF140 problems
Well, it didn't take long for a problem to occur
We recently purchased a Ribtec 585 with a Suzuki DF140 motor.
We launched (for the first time!) at Mudeford on Saturday. Lovely weather in the morning, and the sea was very calm. It took a while to start, but it seemed to work much better once I'd plugged the kill-switch in
Our first impressions were that the engine was very quiet and the sea was too flat for any real hull testing But for some reason it wouldn't rev past 5000. It felt fine and picked up very nicely at every speed under 5000. I thought it might have been throttle cable slipping somehow, and didn't worry too much more about it. After that however, every time we depowered and repowered, the maximum revs achieved dropped by about 500rpm a time! It felt very much like a slipping cable, so we turned back straight away. By the time we were back at Christchurch she was only revving to 2000rpm - we couldn't even got up on a plane! Intererestingly, if I increased the throttle quickly, it would cut straight down, but I was able to tease the revs up by moving the throttle very gently - this all pointed to a slipping cable.
When we got it home, I connected the flush muffs and it revved just fine - but then it wasn't under any load. I found the throttle under the hood and it looks like the controls *were* in fact fully opening the throttle. Either that, or somehow it had started working again on the way home.
No engine faults showed up at any point. If it was a fuel supply problem, I'm guessing the lambda sensor would read lean and throw up a fault?
Any ideas what might cause this? I'm going to get on the phone tomorrow, as it should still be under warranty - but the original supplying dealer is hundreds of miles away, it if it's something obvious I'd like to have a crack at it myself!
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28 November 2004, 21:08
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#2
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Member
Country: UK - England
Town: Dorset
Length: 4m +
Join Date: Oct 2003
Posts: 1,410
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I may be way off here but my mates 'rude 90 Etec's controls were rubbing on the cowling and they tended to stick. On an engine like that its more likely to be a mechanical fault than anything else.
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28 November 2004, 21:45
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#3
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Member
Country: UK - Scotland
Length: 10m +
Engine: 2x610hp jets
Join Date: Apr 2004
Posts: 74
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it sounds more like shortage of fuel hence the reason for running fine when not under load,or poss drawing air from somewhere.had same problem on yam 85 years ago.
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28 November 2004, 22:09
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#4
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Member
Country: UK - England
Town: Helston, Cornwall
Boat name: Silver Fern
Make: Rayglass Protector
Length: 8m +
Engine: 2 x 250hp Verado
MMSI: 235024092
Join Date: Apr 2003
Posts: 811
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Quote:
Originally Posted by tonka
had same problem on yam 85 years ago.
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Wow, thats a long time
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Its all got to go - make me an offer...............
Skype - alexgreig
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28 November 2004, 22:37
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#5
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Member
Country: Other
Town: Principalite d'Chaos
Boat name: The Nashers Revenge!
Make: Windsor Brothers
Length: 6m +
Engine: Optimax 225
MMSI: "Mmmmm SI" she said!
Join Date: Jan 2004
Posts: 4,905
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Sounds like fuel to me too.
Had the boat/engine been laid up for a while? and have you checked the fuel filter for Cr*p, or water if it has a seperator? Moving the Boat around after a lay-up may have disturbed some silt etc in the tank or there may have been a build up of condensation.
Its a shame that your first trip out was ruined.
Nasher
PS - Have to agree 85 years is a long time ago to have been running a Yam. Japs must have invented Outboards afterall.
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29 November 2004, 09:48
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#6
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Member
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
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Have a look at the bush in the prop as well - you never know!
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Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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29 November 2004, 20:29
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#7
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Member
Country: UK - England
Town: Ipswich
Boat name: Obsession
Make: ORKNEY PILOTHOUSE 20
Length: 6m +
Engine: SUZUKI 70
MMSI: 235024496
Join Date: May 2004
Posts: 390
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I would have a look at the breather on the fuel tank to see if it is working properly. A good way of testing it when the problem is there is release the fuel filler cap and see if the revs pickup. If it is that it could damage the tank if not sorted.
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30 November 2004, 01:12
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#8
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,866
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You say you forgot to fit the kill cord, so is it percevable that you also forgot the vent screw on top of the fuel tank as well, it happens!!
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30 November 2004, 08:13
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#9
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Member
Country: UK - Wales
Town: Pwllheli-North Wales
Boat name: V-ONE
Make: Highfield
Length: 8m +
Engine: Honda 250hp
Join Date: Mar 2001
Posts: 2,367
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I would also suggest fuel shortage. Could be the inner of the fuel pipe breaking down. When your going along get someone to prime the fuel primer and see if it is any better, also look at whats happening to the fuel primer, is it hard, soft or clapsed. Fuel primers are often the first thing to go on a fuel system, is it cracked anywhere?
The problem is probably alot more simple than you think.
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30 November 2004, 09:04
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#10
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Member
Country: UK - England
Town: scotland
Boat name: Leviathan
Make: Phantom
Length: 8m +
Engine: GM Diesels
Join Date: Jan 2003
Posts: 1,437
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Quote:
Originally Posted by Cookee
Have a look at the bush in the prop as well - you never know!
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Prop bush sliping, causing the revs to die! I wouldn't think so.
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30 November 2004, 09:22
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#11
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Member
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
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Quote:
Originally Posted by Jonny Fuller
Prop bush sliping, causing the revs to die! I wouldn't think so.
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OOOOOPS - the tank vent seems like a better idea!
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Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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30 November 2004, 10:14
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#12
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Member
Country: UK - England
Town: Christchurch
Boat name: Sha-my-sha-my
Make: Valiant
Length: 4m +
Join Date: May 2004
Posts: 167
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Thanks guys, you've given me some excellent suggestions to go on!
The boat is fitted with a 100l underfloor tank - should I really have had to open a vent manually as with the smaller jerry can tanks? I should have opened the filler cap to see if there was a big vacuum causing the problem. Checking the primer bulb would also have been very sensible. You live and learn
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30 November 2004, 10:26
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#13
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Member
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,252
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Quote:
Originally Posted by jlanng
Thanks guys, you've given me some excellent suggestions to go on!
The boat is fitted with a 100l underfloor tank - should I really have had to open a vent manually as with the smaller jerry can tanks? I should have opened the filler cap to see if there was a big vacuum causing the problem. Checking the primer bulb would also have been very sensible. You live and learn
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No the tank will be self venting!
Nick
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30 November 2004, 10:54
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#14
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Member
Country: UK - England
Town: Manchester - Abersoc
Boat name: MeMe
Make: SeaPro 595CC
Length: 6m +
Engine: Mercury 115 4S
Join Date: Jul 2003
Posts: 1,684
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A very useful thread.........
......considering I also run the same engine. Good luck with your inverstgations, however, if still under warranty, please make sure you don't invalidate this by "having a crack at it youself".
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Buy it & Use it, then sell it and buy something bigger
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30 November 2004, 11:08
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#15
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Member
Country: UK - England
Town: I.O.W/Switzerland
Boat name: HotShot
Make: shakey
Length: 5m +
Engine: 90hp Tohatsu TLDI
Join Date: Jul 2003
Posts: 1,559
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Quote:
Originally Posted by Nick Hearne
No the tank will be self venting!
Nick
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Are they not always open though? I can see what jlanng is saying, surely you wouldn't have to unscrew a vent on a large in built fuel tank?
Does sound like a fuel problem. My little yamaha did that when I met up with everyone for the first under 5m IOW cruise. It wouldn't go to nearly full power so I switched the tanks over and it was fine. When I got home I took the thingy out of the tank and made sure it was all clear and its been fine ever since.
Tim
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30 November 2004, 11:22
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#16
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Member
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,252
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Quote:
Originally Posted by slimtim
Are they not always open though? I can see what jlanng is saying, surely you wouldn't have to unscrew a vent on a large in built fuel tank?
Does sound like a fuel problem. My little yamaha did that when I met up with everyone for the first under 5m IOW cruise. It wouldn't go to nearly full power so I switched the tanks over and it was fine. When I got home I took the thingy out of the tank and made sure it was all clear and its been fine ever since.
Tim
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Tim, yes that is what I'm saying the tank is self venting, you can not shut it off! It has a permanent open vent.
Nick
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30 November 2004, 12:43
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#17
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,866
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Still it is worth investigating the vent! could be the tube inside the console or where ever your fuel tank is located is kinked or blocked. Just eliminates another potential problem me thinks.
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30 November 2004, 12:49
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#18
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Member
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,252
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Quote:
Originally Posted by Hightower
Still it is worth investigating the vent! could be the tube inside the console or where ever your fuel tank is located is kinked or blocked. Just eliminates another potential problem me thinks.
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Yep, agreed may be somein livein down it!
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30 November 2004, 12:57
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#19
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Member
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,866
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Have to be something pretty stoned to be living and sucking on dem gasoline fumes.
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30 November 2004, 13:17
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#20
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Member
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,252
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Quote:
Originally Posted by Hightower
Have to be something pretty stoned to be living and sucking on dem gasoline fumes.
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Mite be one of doose Gas junkie's!
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