Reply
 
Thread Tools Search this Thread
 
Old 15 November 2020, 09:07   #41
Member
 
Country: UK - England
Town: Paignton
Make: sunsport
Length: 3m +
Engine: Mercury 9.9
Join Date: Oct 2020
Posts: 81
I'll try and find out, the problem is that the store is closed and the guy who is there for a couple of hours a day isn't the mechanic. I think the mechanic comes in when needed at this time, I'll see what I can do.
__________________
sunsport350 is offline   Reply With Quote
Old 15 November 2020, 10:03   #42
Member
 
Country: UK - Scotland
Town: north ayrshire
Boat name: charlie girl
Make: S/R5.4/regal3760
Length: 10m +
Engine: Suzukidf70 2x6lp 315
Join Date: Jul 2009
Posts: 3,721
Quote:
Originally Posted by sunsport350 View Post
I'll try and find out, the problem is that the store is closed and the guy who is there for a couple of hours a day isn't the mechanic. I think the mechanic comes in when needed at this time, I'll see what I can do.
I wouldnt stress too much, in all likelihood the tech found a little bit of casting flash that was preventing a seal seating properly. Chances are all the carbs have a similar defect that doesnt get noticed by the person on the assembly line whos doing 100's per day hence the reason for pdi's & warranty to pick up little issues like this.
Hope it goes well for you
__________________
beamishken is offline   Reply With Quote
Old 15 November 2020, 10:17   #43
Member
 
Country: UK - England
Town: Paignton
Make: sunsport
Length: 3m +
Engine: Mercury 9.9
Join Date: Oct 2020
Posts: 81
That's what I thought it would be to be honest, the carbs aren't made at the same factory as the engine so probably a QC issue, I'm pretty confident it will be fine now.
__________________
sunsport350 is offline   Reply With Quote
Old 28 November 2020, 16:31   #44
Member
 
Country: UK - England
Town: Paignton
Make: sunsport
Length: 3m +
Engine: Mercury 9.9
Join Date: Oct 2020
Posts: 81
I have ran the OB a couple of times, runs sweet. Started on third pull when cold and first pull when warm.
__________________
sunsport350 is offline   Reply With Quote
Old 06 December 2020, 06:41   #45
Member
 
Country: UK - England
Town: Chelmsford
Length: 4m +
Join Date: Jul 2020
Posts: 675
Quote:
Originally Posted by sunsport350 View Post
I have ran the OB a couple of times, runs sweet. Started on third pull when cold and first pull when warm.
Looks like it is now all sorted. Have you managed to use it out on the water yet
__________________
smallribber is offline   Reply With Quote
Old 06 December 2020, 07:15   #46
Member
 
Country: UK - England
Town: Paignton
Make: sunsport
Length: 3m +
Engine: Mercury 9.9
Join Date: Oct 2020
Posts: 81
Quote:
Originally Posted by smallribber View Post
Looks like it is now all sorted. Have you managed to use it out on the water yet
Hi, no not yet, probably wont until the new year now.
__________________
sunsport350 is offline   Reply With Quote
Old 12 December 2020, 22:32   #47
Member
 
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,409
My only thought is why was the fault not picked up on the PDI?
__________________
Black Dog Marine
www.blackdogmarine.com
Turbodiesel is offline   Reply With Quote
Old 13 December 2020, 07:47   #48
Member
 
Country: UK - England
Town: Paignton
Make: sunsport
Length: 3m +
Engine: Mercury 9.9
Join Date: Oct 2020
Posts: 81
It ran ok for about ten minutes when I went out on it then I could smell petrol and the OB started running rough. I don't know how long they run it for on the PDI
__________________
sunsport350 is offline   Reply With Quote
Old 18 December 2020, 09:18   #49
Member
 
Join Date: Jul 2011
Posts: 874
I recently purchased a new 9.8hp Tohatsu 4 stroke (same unit as Mercury 9.9hp).
After running it in a bucket for an hour or so it too started leaking petrol from the carb bowl gasket.
On phoning the dealer I purchased it from they knew straight away of the problem.
Apparently Tohatsu were supposed to have recalled the engines that have been fitted with the defective gasket which supposedly is missing a brass ring around the fuel feed.
I'm being sent a new non defective carb to swap over myself.
I've had a 2008 Tohatsu 20hp from new.
It has thousands of hours under its belt and never skipped a beat!
Hopefully this is a 1 off!
__________________
kaman is offline   Reply With Quote
Old 18 December 2020, 09:26   #50
Member
 
Country: UK - England
Town: Paignton
Make: sunsport
Length: 3m +
Engine: Mercury 9.9
Join Date: Oct 2020
Posts: 81
I was told there were a small batch of OBs with this problem how small I don't know but mines hopefully sorted now and yours will be, the fact they were both not picked up at PDI check could mean they run ok for a while before the problem shows I'm no mechanic I expect someone here will correct me if I'm wrong. Have a good xmas
__________________
sunsport350 is offline   Reply With Quote
Old 18 December 2020, 09:50   #51
Member
 
Join Date: Jul 2011
Posts: 874
Hi Sunsport.
On removing the carb bowl to check the float wasn't sticking due to crud in the petrol I could see the rubber gasket on the bowl had deformed where the fuel enters from the pump.
The gasket circles around a small domed filter on the bowl.
This is where the leak was (directly below the over flow).
Mines ran fine for a short period at idle and then started leaking when increased the revs to around 1/4 throttle so it doesn't take much to induce the leak.
Hopefully nobody gets caught out when out on the briney stuff.
This sort of thing really shouldn't be happening though - all defective units should have been recalled.
The new outboard is my Xmas pressie so hopefully the new carb sorts out my pre Xmas woes.
Have a merry one .
__________________
kaman is offline   Reply With Quote
Old 18 December 2020, 10:04   #52
Member
 
Country: UK - England
Town: Paignton
Make: sunsport
Length: 3m +
Engine: Mercury 9.9
Join Date: Oct 2020
Posts: 81
I did get caught out, had a bit of row against the tide wasnt fun, luckily I hadn't gone too far out, I'd gone along the coast line, but I was knackered though.
__________________
sunsport350 is offline   Reply With Quote
Old 19 December 2020, 22:53   #53
Member
 
Country: UK - England
Town: Cambridgeshire
Boat name: Nimrod II
Make: Aerotec 380
Length: 3m +
Engine: Yam 15 Tohatsu 9.8
Join Date: Nov 2007
Posts: 8,272
Thanks for that info Kaman.

If it's the same design as in the image below of a slightly earlier Mercury 9.9 I can understand how that might allow the gasket to leak. It isn't a great gasket design as it's rubber, round in cross section and sits in a groove on the float bowl flange. Even a new gasket from the maker can be just a bit out in shape and as you bring the two parts together at the final moment you loose sight of the gasket and it can spring a fraction from its seating as you close together.

I guess yours had an issue with one of the places where fuel passes through the flange??
Attached Thumbnails
Click image for larger version

Name:	Carb cleaned.jpg
Views:	62
Size:	142.2 KB
ID:	135855  
__________________
Fenlander is offline   Reply With Quote
Old 21 December 2020, 06:37   #54
Member
 
Join Date: Jul 2011
Posts: 874
Hi Fenlander.
That looks near identical to my Tohatsu carb.
It appears to be leaking from where the fuel enters the bowl.
Hard to see when the carb is mounted on the engine.
A couple of squeezes on the primer bulb when the carb is off and in your hand and you can see fuel ouzing out from this area.
__________________
kaman is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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




All times are GMT. The time now is 17:04.


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