I have been looking at outboards up to 20hp - I obviously want to make the well big enough and strong enough to accommodate a wide range of engines. As you may know my back-up engine is a little air-cooled Honda 2.3.
It sips petrol and never fails to start. I also used to ride Honda motorbikes and my mower is a Honda - never been let down by one yet.
It looks as though the 8 and the 10hp long shafts are closely related
the 15 and 20 appear to be more or less the same engine - same bore, same stroke.
the weights are more or less the same as well
So far, so good.
but I am missing some crucial dimensions. I am sure there are some reasonably accurate profiles of these engines on the web some-where so that we can do the same cad trick we did with the Tohatsu
I need to know how big the cowl is relative to the top of the clamps and the distance from the clamps to the narrowest part of the leg, the width and length of the anti cavitation plate
Also, has anyone got any experience with the charging facility on these engines. My Tohatsu is 6 amps - these bigger Hondas offer 12 amps - does that mean it is twice as good - it does add quite a lot to the price. So it might be better to go for the lower charging and use that cash to buy solar panels - and who sells solar panels?