Originally Posted by bedajim
I run a 15 2st long shaft on a custom made bracket
With separate 25 l portable fuel tank
I also use it in very shallow water to protect the main
It's pulled a couple of Vipermax's along from a shallow anchorage to deeper water
Yeah but you have " Length: 7m+" - 15Hp could be the main engine on a 4m!
Tomkat does have a point tho'. I used a 2 on mine for about 2 outings. Outside the marina it was remarkably close to a chocolate fireguard, admittedly partly due to the shaft length (or lack thereof).
As for the warming up, the small engines are designed to be started & used from cold. Once you get into 4-ish Hp territory some have a simple "stop - go" clutch, and some have full F-N-R. THing wioth F-N-R is there is usually a big lever on the side, that if you have an A- frame suddenly might fill the extra 3 inches clearance you don't have! Mine is "on or off" - not even a clutch, but at anything below about 1/3 throttle it has as near as no forward thrust anyway, so it can be started, brought back down to idle & might as well be in neutral.
I "brass necked" a couple of "can I borrow your aux for 2 mins to see if it fits" moments to see what engines would & wouldn't fit. Well worth the time spent, coz what the paper data doesn't tell you is where the bulge in the case (max width) is...
I think I'm safe in summarising here that get as many gee gess as you can fit on, and the rest is down to your preference / transom geometry.