New carb?

[MechoShade]

I have a 85 sj413/samurai I recently purchased over a month ago. I have been fighting this issue with my carburator ever sense I got it but usually only when the engine was cold, soon as it warmed up a bit it ran fine.
So here's the problem, at operating tempurature and when it's cold it seems as though the accelerator pump isn't working. At an idle it is fine, but as soon as you hit the gas (at idle still) it seems to hesitate and not doing anything and feels like it is about to die but then it just "kicks in" and revs go up (still all at idle). Now when I put it in gear, soon as I hit the gas and try to move it just completely dies and revs drop (like engine is cutting out). To go forward or reverse, I either have to drop the clutch above 2300rpm (ish) and it will finally start to somewhat move but it still hiccups and stumbles until I'm passed 3000rpm then I seems to be fine but once I shift into second, it tries to die again until revs above 3000rpm.
Now when I look down the top of the carb and I manually move the accelerator pump, I do see a healthy stream of gas get squirted into the carb (it's a pin sized stream, I'll post a picture). Now the carburator that I am running is definitely not the stock carb.. The name of it is "Changwon" made in Korea, I can't find a rebuild kit or any information about it and even a part number isn't on it either.
I just recently purchased from an auto wrecker, an 86 samurai carburator (says Aisan on it and only other writing I can find says "2B") but it looks completely different, it fits in the same spot perfectly but the bolt style is different (changwon carb bolts up from the manifold and 86 carb bolts go down into the manifold) and all the hoses for vacuum, fuel, etc, are different.
This is my first carburated vehicle and don't really no correct terms for it all. Any help is greatly appreciated!

[twiss]

hmmmm thats an odd one... usually the manifold doesn't have big long studs coming out! there must be a way of removing somehow!
Where are you based anyway?

[timwilks13]

whats your timing like btw? i know it sounds carb related but with the engine not wanting to accelerate etc i had that when my timing was off, worth checking just to eradicate that as a possibility.

[Ladaman]

The "bolts" fitted into the manifold look to be just some screwed bar fitted in the holes.

You can remove it by locking two nuts together on the bar and unscrewing the lower one, or slitting a nut from one flat to the bore, screwing it onto the stud. Then gripping with mole grips onto the stud and unscrewing.

[MechoShade]

Located in Canada. I would say timing should be okay but I have not checked it so it could it out, another thing I forgot to mention is that even after the engine is shit off it diesels (keeps trying to run till eventually just stops), it had been doing that every second/third shut off for the past week and a half, getting worse every time. In which case never thought about checking the timing but I will today. I will also try to use the nuts and see if the bolts are removable

[timwilks13]

ill be suprised if they dont come out as they are just threaded holes, try the nut approach, try the molegrips. you can always drill a little hole through the side of the studs to stick a screwdriver through to unwind them if needs must.

[MechoShade]

Yeah they came out, is it worth rebuilding the samurai carb? All parts stores here can't get a rebuild kit or anything, but can get it remanned but have to ship it away to get it fixed. What carbs are worth using instead of the samurai Aisan one

[timwilks13]

Weber or SU hif44 are the two most common. You'll have nothing but trouble with the samurai one so if you can get it changed I would!

[twiss]

Yeah if you are getting engine run on i'd definitely check the timing

In the US lots of people seem to use harley davidson carbs, or toyota corolla carbs... you can't really get the HIF44 carb over there
I think I've head of people in Canada use the carb from a Hyundai Pony

Theres a bit of a guide to it here... but its not brilliant

http://www2.izook.com/?page_id=310

[Ladaman]

I rebuilt my standard carb loads of times. It was still a pile of crap. Bin it.

You could go a bit extreme and go bike carbs.

http://geckocycles.com/samurai_products.htm

I nearly went this route. I even bought the carbs!