Originally Posted by outlaw19
G'day, I need serious help, i'v just bought a Bv-1 Chassis with o.s 15 pull start engine, i ran it in as required and have just changed fuel to 20%, The car is only four weeks old now and it won't start. I couldn't get it too fire so i changed the tuning and now nothings right tune wise!? I'v checked The GLow plug, warmer, fuel and pulled the motor out and nothing seems wrong. I cant fugure it out??? Can anyone help?
OK, lets see where we can start here. First, when you changed to 20%, did it run at all with the new fuel? If not did you try the breakin fuel again?
Before you try these trouobleshooting tips, put your carb back to a good factory setting, Like 2.5 turns out on top end, 2-3 turns out on bottom end. Look at the owners manual and it should tell you, or try the OS web site. Last, set the idle to about 1mm or so open. When you look down in the carb with the filter off you can see the small gap. We're just trying to get a "close" setting for now to see if we can get it to start or even pop like it wants to start.
Another thing, did you try a new plug? Breakin fuel can sometimes foul a plug because of the rich setting so even if it gets hot and turns orange with an igniter on it, try a NEW plug.
Make sure fuel is getting to the carb. If you keep turning it over and it sounds like nothing is happening. Take the plug out, cover the head with a rag and turn over engine to get any fuel out. Also look at the plug and see if it's wet. Wet means fuel is getting there. Replace the plug and prime the carb. Prime it by filling up the carb with fuel from your fuel bottle while the carb is closed. After you fill the carb open the carb up so the fuel goes into the engine. This should be enough to make it do something without hydro locking (too much fuel in the cylinder).
Try to start it now with your NEW plug and FULLY CHARGED IGNITER, If you do this and it starts or pops then you might not be getting enough fuel to the carb at the begining of the start up. Sometimes you need to hold your finger over the stinger on the pipe (not when it's HOT) and turn over the engine up to 10 seconds to get enough fuel to the carb. They can be stubborn sometimes. If it does pop or start, fill your tank and prime it and go from there.
Last, make sure your glow igniter is FULLY charged when you try all the above. Try all this and tell us your results. Good luck, you'll get it.
This subject is actually easy, just quite a few things to try and troubleshoot to find the source of the problem. It's usually a plug or Igniter not charged enough. That or no fuel to the carb yet. Let us know.