What motor size can i use ?

[Bushwacker]

Originally Posted by cadeco

. . . That's what i was thinking , but, if the rule is " 1 inch for each foot" then , the 20" would not work because using it i would need a 24/26 inches setback giving me 2", maybe 3" to be raised and because the difference between shafts is 5" i would be 3 inches too short. What do you think?
thanks again...

My point was that I think the 1"/foot of setback "rule" is bogus, at least for a Hermco bracket on a 20' SeaCraft Seafari! In my case the AV plate needs to be somewhere around 4.5-5" above keel for a 30" setback. My old motor mounted on transom had the AV plate about 1" above keel. So I needed to raise motor about 3.5-4" higher when moving motor aft by 2.5'. Therefore the "rule" in my case would raise motor 3.5" to 4"/2.5' = 1.4 to 1.6"/foot of setback!

Before anyone casts this "rule" in concrete, let me double check my AV plate height, as I haven't actually laid a ruler on it since Don raised my motor approximately 1"! Will try to get a measurement/picture in the morning!