G'day Folks

The throat size of the carby also has an effect on the fuel, the later carbies for the 202/3.3ltre motors have a much larger venturi than the early "Grey" motor Holdens (138 cubic inch) Landrover 2.25 =139ci, the ideal main jet for a Stromberg BXOV-1 for a Landy is a 49 or 50/51, should be available from one of the Holden Specialist Restoration Coys, "Rare Spares", or Harrisons Holdens comes to mind it might be worth getting on the "Old Holden website and try to source a Jet or a complete early type (FJ--EJ) or no later than a HR.

I personally recommend a Zenith 36IV type (2.25 from 1967-on)as they are a quite reliable carby, Note: mixture adjustment for them is-- OUT = Rich, IN = Lean, THE OPPOSITE TO A HOLDEN STROMBERG

Hope that is of some help


cheers

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68 2a GS 6028D 172-484
Aust No5 trailer 2wheel 1/2 ton Ch 1974=173-489
REMLR No 003

Ditto UncleHo, However if you must use a stromberg, use the early 1-3/32". (Definately no larger than the 1-5/32". (Venturi size is stamped on the side of the main body). If you are using the later type (therefor larger), I suggest you prise out the power valve plunger from the carby top and check the plunger piston, these have a small plug, like a welsh plug inserted into the top of the piston. These plugs commonly fall out, I usually solder them in when replacing them. The loose plug allows the vacuum to escape and subsequently the plunger drops down under spring tension opening the power valve. The power valve in these later carby's is far to large for the 2.25 requirements giving a rich mixture and even allowing the engine to run with the main jat blocked. there are several other possabilities, difficult to diagnose via internet. Check that the power valve is not leaking (remove and vacuum test), Blocked air bleed hole or tube, damaged or incorrectly installed emulsion tube (these sometimes fall out when main jet removed). Float level etc.
Hope this may be of some help, I strongly suggest you stick with the original carby, they can usually be sorted out.
Regards Andy.

thanks guys, i was planning to fit an orignal solex if i couldn't sort the strommy. I will take a photo of the adjustable jet and post for info/interest/reference. It is my belief that the power valve is at fault, i just couldn't believe the car ran so well(comparatively) like that.

Also rare spares didn't stock jets for strommys anymore (Hobart anyway) and it wasn't worth the bother of hunting around too long for. I could also solder the original jet if i was keen as well...but i'm not.

now that i know that the engine will faulter/hunt/stop with the valve wound down, i can investigate further.......that means i will probably end up with the solex.

Thanks for the advice, i shall return.

Reported

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96 Defender 130 crew cab
88 Isuzu 110
ex 85 Isuzu 3.9 120 ute

hi
dunno how i missed your post?
anyhow i had a very simmilar issue with my strommies.
all sorted now though

turned out that the brass?? seat/hole the needle fits through gets worn over time so too much fuel gets through no matter what you adjust.

the symtoms for this where: sooty deposits around the exhaust, very sooty plugs within about 8-12 hrs running. used a LOT of fuel.

the seat needs to be pressed in so i had to get a garage to do it. since then its been great.