Brian I know you have Zukes and they excellent engines - the 140 would a good option BUT that 1 gallon of oil at 100/1 will go further than 2 oil changes - moot point
I am a 2 stroke fan admitted, that being said and having a Merc 200 on my boat - IMHO the Etec's are probably the best engine being built today - power-weight-sound-fuel-maintaince-and probably longetivity. As I said a 150 will damn near throw you out the back on a 20, a 200 almost did on a 22 Sea Ray Laguna after the owner was already warned to hold on
replaced a 150 Merc
I would not put a 115 of anything on it, including an Etec, just not enough mid range power and the fuel would go down working harder -JMHO
