I am having the same problem.
I would like to know when to set the timing on my TY395FI pump. Unlike the instantaneous spark in a gasoline engine, the fuel is delivered over a quarter turn of the crankshaft (and a 45° turn of the FI pump shaft). My manual says it should be set to20° BTDC but is that for the beginning of the squirt or when the full amount is delivered from the FI plunger? Or somewhere else?
David