Re: Buying a motor for parts?? Good idea??
The 105 and the 75 will use the same starter, same alternator stator and flywheel. The Motorola ignition is swappable, however even though the distributor body is the same, the center shaft rotor, and cam (a permanent assembly) can not be swapped because one is three lobed and one is four. If one is an electronic distributor and the other is a points signaling, the electric eye is swappable IF you get a center shaft with a shutter to match which engine you are using it in. Lower units, while they may look different are completely interchangeable, both externally and internally.
Reeds and Vee blocks are the same except the 105 has four of them. Fuel pump is exactly the same. Carbs are different but if you found a third one for the 105 pair, then you could use three 105 carbs as a set on the 75--do not expect an increase in horsepower though.
Choke solenoid, starter solenoid, bypass covers, pistons and rods: all are the same.
Even the match plate and exhaust down tube are the same.
HOWEVER: if the 105 is anywhere near repairable, IT is the engine to use if your hull is rated that high. The fourth cylinder and extra displacement gives much more torque and you will be happier with it on the hull--especially if you intend skiing.
Just noticed you said both were 3 cylinder engines. The Largest 3 cylinder Chrysler ever made was 90HP. Are you sure that a 105 hood is not sitting on a 3 cylinder engine? 3 Cylinders were 70, 75, 85, and 90. Or di the seller describe it as a 3 cylinder 105? Check the model plate under where the fuel line and control cables enter the engine. The first two or three numbers indicate horsepower.
It had a SS prop on it, that alone was worth it. If you have a place out of the way to store it, this is not a bad idea.
