Hello Clinton, welcome to the forum!
If the boiler itself, [the water vessel], is not rusted out and leaking,, EVERYTHING ELSE is repairable, replacable, or rebuildable.. At a far lower cost than installing a new boiler.
Here is a quick list of potential problems not related to the EFM hardware:
Have you cleaned the chimney flue pipes this season?? the EFM needs a clean chimney to idle at low fire for summer use.
Whose coal are you burning??. Poor quality coal will not burn well at an idle.. you end up having to increase the timer's cycles to keep the fire lit.
Have you cleaned out the bottom of the coal hopper or coal bin??? Maybe you have an accumulation of fines at the auger end.
Do you open the fines handle every day when the unit is running, the fan is blowing, to blow out the fines from under the burn pot?? An accumulation of fines will block air flow through the grates.
Have you watched the unit run?? is the ratchet slipping or jumping notches? is the fan running correctly, have you oiled the motor and checked the transmission oil level??
That's a 'quick check' list of owner items.. anything more is probably some worn items in the feed auger, burn pot, or an electrical component that is worn out and unreliable.
If you want some encouragement to get the EFM repaired or rebuilt,,, do this simple math: take the number of tons you burnt last year,, lets say 5 tons, multiply that times 180 gallons per ton for oil, that's 900 gallons,, multiply that times $4.00 per gallon [that's cheap] and your get= $3600 for oil just to feed the boiler,, not including installing an oil burning boiler..
I'm pretty sure you could replace every electic component, rewire it completeley, and instal a rebuilt stoker unit, so in essence it was a fully rebuilt boiler for much less than that $3600 for one season's oil.. actually probably around half that amount..
Anyway,, keep us informed with what is found to be the problem,, every little bit of knowledge helps..