Rap 24 hp semidiesel, first start attempt in 20 years.
This engine was built in 1930 or earlier. Have been stored outdoors for the last 20 years. After spending hours getting all parts movable this is the first start attempt. Seems to be low start pressure (6.5 bar) and low capacity in start air hose that is the biggest problem.
Rap 24 hp semidiesel, second start attempt.
This video illustrates what happends when these two stroke semidiesels run
out due to too much oil in the crankcase. With my left hand, I block the
injection pump, so from that time the engine run on lube oil only, no
diesel at all. I have heard lots of stories about this from decades ago but
this is the first time, to my knowledge, that it is captured on video.
Luckily we had blocked most of the air intake prior to starting and ended
at somewhat over 1000 rpm. Max operating rpm is 425-450. With full air
supply, I would guess this engine would reach thousands of rpm and I could
only guess what would have happened then...
The electric glowplug short circuited so we had to rely on the propane
burner which had slightly low temperature. In this startattempt, we used an
acetylene burner and got the glowplug bright red. The crankcase was,
unfortunately, filled with too much oil so the engine was running on its
lube oil from the crankcase instead of diesel. Still some trouble with the
fuel injection, doesn't feel right when injecting diesel manually.
Rap 24 hp semidiesel, third start attempt, the successful one.
More than two years since the last start attempt. Too many other projects
have had priority.
We used a couple of hours to get things running smoothly again and pumped
out more than 10 litres of rainwater from the crankcase but when we tried
to start, it went far better than expected :-)
The engine started running backwards and at time 3:00, I reduce the rpm and
give it a couple of manual fuel injections to change direction to forward.