ive bought a Trojan mini motor in bits and would like to work through fixing and restoring it to get it up and running. can anyone point me in the right direction to a full account of someone doing this ?
A further thought: PPL registrations are from Surrey (June 1951 to January 1952) - I wonder if it belonged to someone connected to Trojan and that's how they got the 'unlisted' engagement lever? It won't have belonged to the company (they had Croydon registrations) but could have belonged to an employee for example.
Thanks for replying..the manufacture number is A3887 so a mk1....all very interesting and befuddling at the mo...here’s a few more photos including the bike that the motor was on, there is no Trojan hoop that came with it rather a plate was made that attached to the bikes frame from the bike rack. i don’t have any photos of the motor on the bike -pre dismantling...duh.... Tried to test the magneto by putting a drill on the crank but the end of the crank that the bolt attaches the magneto sheared off....so when I get it apart I’ll have to get an engineers to fix/weld the threaded 15mm end of the crank back on....it’s going to be a longer fix...lol
Welded the sheared end of the crank back on...it was the end 15mm and thankfully just the section that the nuts threads onto to hold the stator half of the magneto. Still need to clean everything up and put it all back together when I get time.
Started to put the engine back together and whilst attempting to get the piston back in I broke one of the piston rings. I’ve looked at the info sheet to the engine and I don’t know what rings to look for or where to find a replacement? Can anyone help?
So the engine is up and running!!!! It does piss petrol from the pump top (part A13) that’s attached on the carb top (last 3 seconds of video). not sure what to do to stop it. the pressure from the 2 stroke seems to force the petrol up this part, it’s like a rainy mushroom...lol any suggestions? the main jet should be a No43 but is a No45 ..don’t know it this would make it happen?
So for anyone that ends up follow this route with similar problems Danny send me this which seems a logical approach to the petrol problem, I’ll try this next week when I have some spare time:
There is no pump or pressure involved, the fuel just goes down by gravity. What's happening is the float chamber is flooding, probably because the float valve isn't shutting down the fuel supply. When the float chamber fills up, then it finds its way out of anywhere it can. Normally the float chamber top gasket is no more than a piece of brown paper (8 to 10-thou maybe). It doesn't want to be thick, otherwise the float will have to travel up that much more for the needle to close the valve, which makes the fuel level that much higher. Check the float actually floats. Take it out and shake it, see if you think that petrol may be getting inside. If it sinks, then that's no good. The tip of the float needle and the valve it locates in the top needs to be impecably clean, and to seal the valve when it goes up. Put some T-cut or brasso into the valve and twiddle the needle to bed it into the seat.
there is no pump - what you appear to be describing is the "tickler" the action of pressing down against the resistance of the spring that holds it in its up position. By pressing down on the tickler you are pushing the float down allowing fuel into the bowl - when starting from a period of standing you want to know you have fuel in the bowl, so the tickler is held down until you see a tell tale of fuel from the pin hole letting you know the bowl is full. if you continue to have fuel flowing when you release the tickler then your float is not seating properly as its job is to allow fuel unto the bowl as it is used and should stop the flow before it gets high enough to overflow. Common problems are dirt or old evaporated fuel preventing the float from free movement or the float being put in upside-down when re-assembled.
Thanks for replying Chris....tickler is a localism many have used over the years & still do....it implies the affectionate disposition we share for these engineering wonders of spark, petrol and air. The Carburettor pump knob and spindle connected to the Carburettor pump piston will from now on be referred to as the “tickler”...but maybe “tiddler...if mine keeps having a little tiddle”.