Best motor for altitude?

[kylant]

looking at a new boat. 2 boats I am considering have the ZR4 and 1 has the H5. the boat I really like has the ZR4. boat will live most of its life at 6500ft. wondering what the best motor for altitude is?

I know I could do a prop change.

Suggestions? thanks

[nohlan_4]

H5 probably, depends on which boats and the size.

[kylant]

h5 probably, depends on which boats and the size.

gs22

also looking at a 230 with the ZR 409

[nohlan_4]

gs22

also looking at a 230 with the ZR 409

What are your plans for the boat? If it was swapped I would say you probably be fine but if you want to surf with upgraded ballast or wakeboard you might find that motor lacking at that high of altitude.

[Infinity]

These 2 engines are very similar in torque. I have the ZR409 (similar to ZR4) in my 24ft boat and run almost 5k of ballast with zero issues at 800ft elevation. Obviously a different story at 6500ft. IMO, both engines will be similar and will either be just barely ok at that elevation with the right prop, or you will need the H6 engine. I think you have to test them in situation like this....probably need the H6 with a good deal of ballast.