Remove plywood on the inside.-----Glue in new plywood with EPOXY.------Cover new plywood with fiberglass.,-----Cosmetic repair / filler on the outside.
A chrysler 250 might be a sailboat model.-------It was designed for sailboats , with electric start / battery charging / long shaft / large prop.-----Perhaps near 250 cc displacement.
Big screen TV is thrown out because they were not engineered to be repaired.----So throw out a 40" one and get a new 60" one for less than $1000.-------Who is going to repair these electronic gadgets on 4 wheels.
They say that the battery will last 10 to 12 years.----But will they ?---Any guarantees on that ?----I can't believe these EV upstarts are selling / taking orders when they have never sold just 1 car.----Scams in the making perhaps.
How did these V-8 motors run for you last season ?----Any chance there is a hidden on / off switch.------Hard to believe both have the same issue.----Any testing done on ignition parts or you just threw parts at them ?
Tank holds about 200 gallons or $1000 worth.----My home heating oil tank does not have a lock on it.-----Looked it up on google and locking devices are available.----Might make something as my cat does not bark any warning like the dogs used to.
Loose wrist pins were an issue up until 1961 when they made a HUGE improvement.---From bushing to a needle bearing.-----Went to the same wrist pin as used on a 4 cylinder 125 HP up to 1972-----That likely will never wear out on a 10 HP motor.
How did it operate for you last season ??----Is the motor running when you shift ?-----If motor is not running have your assistant turn the prop while you slowly put it into forward then give throttle.