As Cliff mentioned there us no 44o 2 man. I believe they did make a 440 one man saw. The 940 2 man was the last 2 man Mac made. I believe it used the same engine as a 790/795. I thought I had 2 of them bought but they guy got greedy and sold them on ebay.
most deffinantly a 2 man saw, no doubt, i think the air filter cover he gave me is off another saw, i dosnt fit, pics uploading, will need someone to embed them as i cant figure it out.
looks like a whole lot of redneckery going on there. I think they took a fan housing off a smaller mac, and tried to bolt it on to the 2-man. You will need to wait for the MAC experts to ID that 940/12-25 thing. I know nothing about MAC 2-man saws.
not yet, but unsure why yet, probably not gonna fix this one, but maybe can get a few bucks for some of the parts to fund another saw, im wanting a 024 ish size saw.