Re: Weight difference between 70's model 75hp and 105hp Chrysler
The only difference given the same type lower unit (That is, two piece or one piece) and given the engines are the same as far as power tilt and trim is one more cylinder, piston, and crankshaft throw. It amounts to about 25 pounds more for the four cylinder engine over the three cylinder.
With power TNT, I think the 105 weighs about 275 pounds. On a decent sized boat rated for the larger engine, the extra weight will be negligible.