Has anyone come up with a simple method of temporarily disabling the automatic choke on carby model Magnas (mine is a TP)? Of course it needs to be disabled with the butterfly in the vertical, fully open position.

The choke on mine does work and eventuallly comes off fully but not until the engine is right up to full temperature after 5 to 10km. On the TM that I used to have (bought new in 86), you could make the choke come off after half a km or so just by a quick blip on the throttle.

Currently the TP is using 12.5 litres per 100km of easy country driving and I think the slow release of the choke may be part of the problem. I was thinking of trying to disable it for the summer months.

http://www.aussiemagna.com/forums/showthread.php?p=775246#poststop

link to carby picture{ you need the last picture in the post}
undo the locking nut (choke adjusting screw)

That is the adjuster of the butterfly

thats the way to adjust the choke so it opens fully when set

very fine thread straight screw thread not a phillips
count the number of turns in (write it down somewhere)
to reset when you want the choke to work again

Dead easy. Remove the choke butterfly or lock it in the open position.
You probably have a very lazy wax pellet in the carb, or there is no hot water flow through the car to heat the wax pellet.
The severity of the choke action can be adjusted - screw on the side of the carb - see the manual.
No choke at all means you have to use the throttle very carefully when cold to stop the engine from stalling at the wrong time. Big pistons, fire goes out real easy.

Thanks, magna buff and MadMax. I will try it tomorrow.

I had the carby off and dismantled yesterday for another issue and noticed bad corrosion buildup on the water chamber that heats the wax pellet. The whole outside of the chamber was covered in white mould as were the two coolant hose connecting pipes. I couldn't actually see a leak there when running but figure there must have been one to cause such corrosion buildup. There's a slight air/coolant leak somewhere in the cooling system when under pressure and this looks suspicious. It might also explain the slow release of the choke.

I think I'll have to find another carby to cannibalise because it must be close to corroding all the way through. The rest of the carby is good. It is only the coolant chamber section near the choke that is corroded.

I'm having a look at the carby/water pump/ emissions systems on my magna TP.
water pump was corroded where the 'O' ring seals the pump to the engine block. I concluded this shouldnt corrode IF the corrosion protection system is working. That means, follow the Mitsubishi instructions to ensurre the cooling water is adequately doped with corrosion inhibitor to the Mitsubishi specs and to change it every 40,000 km. I noted many of the coolant additives are not necessarily corrosion inhibiting but are just anti freeze compounds. One need to read the fine print with all this stuff. Sometimes the only way to find out what are the compounds in these products is to get the Material Safety Data Sheet.
I also noted the outlet port on the water pump is a very small diameter and easily blocked.
I drive fairly carefully around the country areas near home and I find a fuel consumption of around 12 to 13 L/100 km. Sounds high but the engine is 2.6 L
Hope this helps.
ps have more to say about the water pump in future posts. Still a work in progress.