Reply
 
Thread Tools Search this Thread
 
Old 04 August 2018, 08:56   #1
Member
 
Vinny31's Avatar
 
Country: UK - N Ireland
Town: Armagh
Make: Xs
Length: 6m +
Engine: 150 optimax
Join Date: Aug 2017
Posts: 143
Priming bulb

Iím chasing a bit of a fuel starvation issue at high revs since my engine was serviced a while back.
Boat runs fine on auxiliary tank however on the inboard tank I get this issue.

To this end Iíve replaced the fuel hose from tank to engine, fitted new priming bulb etc.
My question is should my priming bulb go hard when I pump it then stay hard when the engine is running?
Presently itís doing neither leading me to believe I may be drawing air somewhere.
Thanks

Gavin
__________________

__________________
Vinny31 is offline   Reply With Quote
Old 04 August 2018, 10:19   #2
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 9,008
RIBase
Quote:
Originally Posted by Vinny31 View Post
Iím chasing a bit of a fuel starvation issue at high revs since my engine was serviced a while back.
Boat runs fine on auxiliary tank however on the inboard tank I get this issue.

To this end Iíve replaced the fuel hose from tank to engine, fitted new priming bulb etc.
My question is should my priming bulb go hard when I pump it then stay hard when the engine is running?
Presently itís doing neither leading me to believe I may be drawing air somewhere.
Thanks

Gavin


It should go firm when you pump it & go softer in use but still hold its shape, but it shouldn't collapse.(oooer matron) you might have some crud in the main tank that is blocking the pickup, but this would cause the bulb to start to collapse. You don't say what your symptoms are, can you give us more info?
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4:https://www.youtube.com/watch?v=unkIVvjZc9Y
Pikey Dave is online now   Reply With Quote
Old 04 August 2018, 10:20   #3
Member
 
Erin's Avatar
 
Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,850
I had something very similar which turned out to be some debris partially blocking the inlet barb on the fuel filter/water separator. Once this was cleared all was good. Iíd suggest you disconnect each joint in the fuel line and check for blockage.
Erin is offline   Reply With Quote
Old 04 August 2018, 12:29   #4
Member
 
Vinny31's Avatar
 
Country: UK - N Ireland
Town: Armagh
Make: Xs
Length: 6m +
Engine: 150 optimax
Join Date: Aug 2017
Posts: 143
Quote:
Originally Posted by Pikey Dave View Post
It should go firm when you pump it & go softer in use but still hold its shape, but it shouldn't collapse.(oooer matron) you might have some crud in the main tank that is blocking the pickup, but this would cause the bulb to start to collapse. You don't say what your symptoms are, can you give us more info?


Hi Dave, symptoms are that it will only take full throttle for a few seconds then starts to die. Nearly put me through the screen first time it happened, if I throttle back it will pick up again.

Will run up to around 4K revs without issues.

Iíve run it on a separate tank and it was grand. Hence replacing full fuel pipe work and bulb etc.
Iíve removed the filler cap while underway and not had any suction so am sure itís not air locking.

Iím thinking of changing the water separator then everything will be new
__________________
Vinny31 is offline   Reply With Quote
Old 04 August 2018, 12:38   #5
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 9,008
RIBase
Priming bulb

Certainly sounds fuel tank related. Does your water separator have a clear bowl? If so, any crud in it? Where's your bulb in relation to the filter/separator. You might have a dodgy outlet valve on the primer bulb. I've just had to change a not very old genuine Suzuki bulb that fell apart inside.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4:https://www.youtube.com/watch?v=unkIVvjZc9Y
Pikey Dave is online now   Reply With Quote
Old 04 August 2018, 12:43   #6
Member
 
Vinny31's Avatar
 
Country: UK - N Ireland
Town: Armagh
Make: Xs
Length: 6m +
Engine: 150 optimax
Join Date: Aug 2017
Posts: 143
Yes separator has a clear bowl, no crud or dirt/ water evident. The bulb is before the fuel water separator and is new. Filter on separator is also new at service.
Might pull the lift pipe from the tank tomorrow and check the gauze to try and rule it out.
__________________
Vinny31 is offline   Reply With Quote
Old 04 August 2018, 12:48   #7
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 9,008
RIBase
You say this has only happened since the service, have they fitted the new filter correctly? Not missed a seal out or got one badly seated. Is the filter screwed on (hand) tight?
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4:https://www.youtube.com/watch?v=unkIVvjZc9Y
Pikey Dave is online now   Reply With Quote
Old 04 August 2018, 12:49   #8
Member
 
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Mercury
Length: 3m +
Engine: Suzuki Outboard/25/4
MMSI: 235074042
Join Date: Oct 2011
Posts: 5,169
If you have had the filter bowl apart the O ring might need replacing air getting in there.
__________________
jeffstevens763@g is offline   Reply With Quote
Old 04 August 2018, 12:51   #9
Member
 
Vinny31's Avatar
 
Country: UK - N Ireland
Town: Armagh
Make: Xs
Length: 6m +
Engine: 150 optimax
Join Date: Aug 2017
Posts: 143
Thatís a good point, Iíll pull it off tomorrow and have a look.
Is it possible It may draw air without leaking fuel?
__________________
Vinny31 is offline   Reply With Quote
Old 04 August 2018, 12:58   #10
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 9,008
RIBase
Quote:
Originally Posted by Vinny31 View Post
Thatís a good point, Iíll pull it off tomorrow and have a look.
Is it possible It may draw air without leaking fuel?


Not normally, especially as your primer bulb is before the filter, so pumping the bulb should pressurise the filter, but stranger things have happened & its one more thing to rule out.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4:https://www.youtube.com/watch?v=unkIVvjZc9Y
Pikey Dave is online now   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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:13.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.