Help... 3.5 V8 Strongberg CD carb servicing

[The ho har's]

We have a forward control 101 with a 3.5 rover V8. It is sick, we need to find someone in SE Qld who specialises in these carbys. Have been told to look for a older Jag mechanic as they would know;)

Mrs hh:angel:

[amazing]

three things to try

new diaphram
add oil to dashpots

check spindle for play ( air leaks)

needles dont normaly wear to point of bad running

try above then balance them, then tune using lift slide technique.

if still no joy then stripping is needed as float may be issue.

good luck

[101 Ron]

The carbys are very reliable.
They do have one servicing item which should be checked.
Undo the four screws on the top cover.
Gently tap the cover loose and remove gently.
Don't use dirty hands and tools.
Check the condition of the rubber diaphragm under the cover and be carefull of the spring underneath the cover.
The diaphragm should come out with the whole piston and needle jet.
piston should work freely on the bore.
I always carry a spare carby diaphragm in the tool box of the 101 as they can perish at any time.
Simple job after you have done it for the first time.
The black plastic screw/knob in the middle of the cover on the carby is a damper and should have afew drops of engine oil in the hole if you undo/remove the knob.

[Hoges]

Given your collective "wizardry" it should not be too difficult to sort out the issues. SUs are relatively easy to repair if you can get the bits and not too difficult to "tune".

www.dbraun99.com/Setting_SU_Carburetors.pdf‎ plus there's heaps of good stuff on google search
hope this helps!

[101RRS]

I didn't think 101s had SU carbs. The parts manual only mentions the Zenith CD 175s and does not list SUs at all.

Garry

[101 Ron]

correct Garry......I miss read the question.
SU carbies can be fitted.
What has it got CD strombergs or SU carbies ?

[The ho har's]

Sorry SU style, have adjusted the title ;)

Stromberg CD

We have changed the diaphragms and they have oil in them, it runs perfectly well once started. It is the starting that is the issue.

Mrs hh:angel:

[Blknight.aus]

youve got the choke set right?

[UncleHo]

G'day Carolyn

Have you got a points or electronic Dizzie on that beast,if electronic you may have the wrong coil,as my Rangie had,mine is timed at 8*before TDC and starts and runs well on both petrol and gas,if electronic,then the coil has a direct effect on the module,Mine came with a crook coil and was replaced with a new Bosch GT40,poor starting and running,changed to 40R no luck,a chance comment at British Off Road,and problem solved,returned to genuine Lucas coil,55,000v and all OK,the Bosch's voltage was to high for the module,90,000+volts,since then no problems,if it is points,check to see that the plastic section of the cam has not melted around the spring steel at the pivot as it gets very hot under the engine cover,was a problem on some UK designed vehicles.

I would suggest you contact Mike Bushnell,at "Duel Fuel" at Caboolture as he is brilliant on carbs and gas,I will give you one of his cards on Thursday night at GCLRO meeting,he also does vac diaphragms,"advancediaphragmoptions.com"


Hope that is of help.

[101 Ron]

The 101 on a cold morning does like to wind over a lot.
Check that the enricher cable is going full stroke on that LHS carby.
CD stormbergs like the motor to turnover a lot with the enrichment cable right out and the early rangerovers are the same.
Check for vacuum leaks, like loose carby to manifold bolts .
The enrichment circult on the carby is very simple and not too likely give trouble.
A good test of igniton during cold starting is how well the vehicle starts on the crank handle.
Enrichment cable fully out and crank by hand no throttle, no ignition of 5 full turns.
Then double checking gearbox in neutral/ park brake on, igniton on,give the crank handle a 1/4 turn sharp pull and the motor should start.
If it starts easily by hand , it could be a ignition problem with cold cranking dragging down the volts for ignition.
A worn motor will give less vacuum during cranking with the starter to drag the fuel in.
Is it a 12 or 24 volt 101..............is the voltage drop down boxes( ignition) /relays on the 24 volt side of things working.
My 101 on a zero degree morning may take 30 seconds of cranking to fire up and then will be unhappy for the next 2 mintues before even driving off.
It must be remembered only one carby has starting enrichment fitted.

[101RRS]

A squirt of "Start ya Bastard" direct into the inlet manifold via a pipe from the cabin will solve all that ;).

Garry

[amazing]

regarding starting

winter/summer started fast no delay at all in starting..always full choke, then when started ease it back to half. never had to let it wind up..I always ran timing 6degree btdc.( not standard 4)

std coil ( ign assist)

strombergs. ( better flood angle than SUs) new diaphram and set up first week I bought it 40k+ no issues. very reliable carbs.IMHO.

hand cranking requires no finesse ( can't bring piston up like on a bike) just crank as fast as you can do..normally started within one turn.

good luck getting it sorted