Merc diesel 4.2 issue

Cavalierbond

Well-known member
Joined
26 Jun 2018
Messages
1,504
Visit site
Hi .. wonder if anyone can help ..
4.2 mercruiser diesels ... has a small problem with the turbo no kicking in but it seemed to have cleared ..
Then on way to Brighton lost power in the engine .. left it for a bit and then it would run good again , only to die
Checked the filter , full of bug .. cleared it all out and but it’s still cutting out ... help !!!
 

volvopaul

Well-known member
Joined
1 Apr 2007
Messages
8,722
Location
midlands
hotmail.co.uk
Hi .. wonder if anyone can help ..
4.2 mercruiser diesels ... has a small problem with the turbo no kicking in but it seemed to have cleared ..
Then on way to Brighton lost power in the engine .. left it for a bit and then it would run good again , only to die
Checked the filter , full of bug .. cleared it all out and but it’s still cutting out ... help !!!
You need to clean your tanks before you need new injection pump and injectors .

clean diesel company can sort this for you .
 

Cavalierbond

Well-known member
Joined
26 Jun 2018
Messages
1,504
Visit site
Thanks for the reply’s ...

I have always chucked in the cleaner ...

Does anyone know of a company that covers Dover ?
 

Cavalierbond

Well-known member
Joined
26 Jun 2018
Messages
1,504
Visit site
Thanks Paul ... he can come .. on the 30th haha
Does it sit in the bottom of the tank ?? As in if and I know it’s a if I cut my fuel pipe down so it reaches 3/4 down and does not suck all it in .?
if i can limp home the pressures off
 

Cavalierbond

Well-known member
Joined
26 Jun 2018
Messages
1,504
Visit site
Also .. I have two tanks ... could it “ tee “ off and run both tanks ...
I know this tank may have the bug as well ..
 

DavidJ

Well-known member
Joined
15 Jun 2001
Messages
5,736
Location
home in Brum. S37 sold, was in Med Spain.
www.jensenengland.co.uk
Does it sit in the bottom of the tank ?? As in if and I know it’s a if I cut my fuel pipe down so it reaches 3/4 down and does not suck all it in .?
if i can limp home the pressures off
The bug lives between the interface between the fuel and water In your tank. As a treat (not treatment) for them you can also put in up to 5% bio which occurs in many diesel brands.
Diesel is lighter than water so water will settle at the bottom of the tank.
It will slosh around when underway so a huge risk of engine failure if you try and take fuel from a different level.
 
Last edited:

Cavalierbond

Well-known member
Joined
26 Jun 2018
Messages
1,504
Visit site
Thanks ...
I have always treated the tank so I’m thinking the sludge is the broken up bug

will get the tanks cleaned when or if I get home .....
 
Top