Yes, the motor board really needs to be bolted to something.
Otherwise, what prop are you using?
Motor seems undercompressed but dies when you increase it.
Could the liner have rotated in the crankcase so that the internal ports are masked?
Is the backplate loose?
Fuel looks a bit dodgy. The "John Deer" starting fluid may have an Ether content of between 60 to 100%.
Increasing it's component at the expense of the kero may help.
You say that you are using 3% Amyl Nitrate? It's a restricted substance in most places so you probably have DII, Amsoil or something else
3% may be too much but I'd guess that the ether is the problem..
Can you contact other diesel users in your part of Canada?
I have one of these and it's a big lump of an engine, rather crude c/w the TBR .15 versions, but predictable and easy to use.
Last edited by qazimoto; 07-15-2015 at 04:09 AM.