You could just use rig a small tank with fuel and directly feed it into the line.
How was the blowby?
It sounds horrible, but there's a good chance its only a minor issue.
The one time the SL left me stranded, I thought the motor was gone. It was running fine until one huge backfire when I shut it off, then it would barely restart, and sounded horrible. Smoke billowing, shaking violently, wouldn't idle.
All that happened was a fluke backfire knocked a vacuum hose off. I was out of the shop in 5 minutes. I really don't know specifics because I was 17 and could barely find a dipstick at the time.
