Which screw now?

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

BreckenridgeCruiser

BreckenridgeCruiser

I break things.
SILVER Star
Joined
Aug 14, 2006
Threads
398
Messages
4,437
Location
Ventura, CA
Website
teqtach.com
a few people have told me that if I posted a picture of my 2B injection pump, they would show me which screw to turn to reduce the fuel load for adjusting to altitude. Sorry for the delay but due to the 20" of snow that fell this weekend, i couldn't get out to take a picture until today. Sorry for all of the hassel, but my manual's pictures suck and they really don't describe the process very well.

IMAGE_031 copy.jpg

IMAGE_032 copy.jpg

So which screw is it? The one with the phillips cut into the end? which wa y do I turn to lessen the fuel. How do I know if I have turned it enough/too much?

Thanks again!

Kraig
IMAGE_031 copy.webp
IMAGE_032 copy.webp
 
see pic. crack the big nut one or two flats. Hold the centre while doing it. With a large flat screw driver. Once the nut is cracked you can turn the screw left(lossen direction) to reduce fuel load. Then while holding the centre with flat screw driver you can tighten the large nut. Not too tight. just lightly snug.


I would start with 1/4 turn then drive. A little is a lot. Turn it down till it stops smoking then do a 1/8 of a turn more in the less direction. That will help be more cool on the egts.


Afterwards when it is not smoking try to find some wire and put it thru the nut and centre like the orginal wire is. to prevent it from coming loose and wondering the fuel load.


Does this make sense or what? It is not a hard adjustment. Best with a pyro, but if you smoking all the time I would crank it down immediately.
IMAGE_032 this screw.webp
 
Ignore my marks in the upper lh of the pic, I was testing the corel paint. The screw is the one with the arrrow.
 
brownbear said:
see pic. crack the big nut one or two flats. Hold the centre while doing it. With a large flat screw driver. Once the nut is cracked you can turn the screw left(lossen direction) to reduce fuel load. Then while holding the centre with flat screw driver you can tighten the large nut. Not too tight. just lightly snug.


I would start with 1/4 turn then drive. A little is a lot. Turn it down till it stops smoking then do a 1/8 of a turn more in the less direction. That will help be more cool on the egts.


Afterwards when it is not smoking try to find some wire and put it thru the nut and centre like the orginal wire is. to prevent it from coming loose and wondering the fuel load.


Does this make sense or what? It is not a hard adjustment. Best with a pyro, but if you smoking all the time I would crank it down immediately.
Click to expand...

I may have a similar problem with my 1990 HDJ81 - it billows black smoke.

With the above suggestion, do I do the 1/4 turn clock-wise or counter-clock-wise?
Clock-wise will increase fuel spray?
While counter-clockwise will decrease it?
 
Yeah for the 1HDT it's counter clockwise to reduce the fuel load.
 
You must log in or register to reply here.

Similar threads

cruiser86
  • Question Question
2h fuel bleed screw leaks
Replies
14
Views
1K
sodafeld1
S
M
H engine Fuel Injection Pump - broken screw
Replies
3
Views
573
Moab4x4
M
duece71
Rear heater delete….and now a mystery leak…..
Replies
5
Views
1K
duece71
duece71
Edger
So now Donkey isn't using all 4 cylinders. Old B engine of course.
Replies
2
Views
594
Edger
Edger

Users who are viewing this thread

Total: 1 (members: 0, guests: 1)

Share this page

Back
Top Bottom