Re: 1955 Evinrude 25hp Big Twin No Start

[frankr]

Backfiring in the exhaust often means crossed plug wires, but it also often means there is a spark problem (like cracked coils). You choke it and crank it and keep trying with more cranking and choking. All the while you are discharging fuel mix into the exhaust housing. Then along comes a chance firing which ignites that fuel in the exhaust housing, and BAM. Back in the day, we did the same thing with our cars. Switch off the ignition while going down the road, filling the muffler with gas, then switch the ign back on and BAM. Kinda rough on mufflers which only lasted a year anyway, back then. ("They don’t make them like they used to") That’s a good thing.

Still waiting for the serial number!!! It is important.