ORIGINAL: MTK
ORIGINAL: PlaneKrazee
Gee wizz Matt,
Sorry to hear it's still a bear to start. There must be something different between your bench and installed setup. Any ideas? Sounds like it won't pull prime with the choke closed. Maybe you could try soldering the hole in the choke plate shut.
What is your proceedure for priming? On my updraft twin I close choke, advance the throttle to full, rock the prop twenty times or so, check to make sure the choke plate is wet, then set the throttle to high idle, turn the ignition on with the choke closed, flip once and get a pop, open the choke and two flips it's running.
I wish it were that simple. I've used the rocking technique with the SAP30's and DLE55 with no problem....I've also used the ''choke-full throttle-ignition on-and flip til it pops'' technique with both engines and my ZDZ, Mintor and BME engines. All of these engines are simple to start with these techniques.
Not so with the 33GT. Anyway, the dynatron will be here Thursday. I hope to get a few more flights before it gets too cold. Saturday was a near perfect day but was largely lost due to lack of fire. I was just happy to get one flight in and ran the tank completely dry
I never run the tank dry, always a wet diaphram and full fuel line ready to pull prime. In fact I store it with the tank 1/2-3/4 full. Same Tygon, three years old. I did buy some wiz bang Viton or something tubing (need to find the receipt, it is compatible with alcohol and gas) but haven't needed to change the clunk line yet. However the fill line is very stiff.
I forgot to ask what oil and oil ratio are you using? I've been very happy with the Stihl Ultra @ 40:1. Even 6 month old fuel mix worked fine. Must have stabilizers built in.