shaft to long?

[Little.desperado]

Hi Everybody,<br /><br />I use a 35HP Evinrude Outboard from 1983 on my inflatable boat(length 4,3 metres).<br /><br />The outboard is a long shaft but normaly i should use a short shaft on my inflatable boat.<br /><br />Does it cause any problems if i use a long shaft outboard instead of a short shaft on my boat? <br /><br />Thanks for your help!!!

 

[AJ168]

Re: shaft to long?

I can't see it causing any problems except that the boat draws more water than it would with a short shaft.

 

[Little.desperado]

Re: shaft to long?

Hi AJ168,<br /><br />What do you mean by " the boat draws more water"? <br /><br />Do you mean more water splashes around?<br /><br />Does this also reduce the top speed?<br /><br />Thanks for your replies!!!

 

[JB]

Re: shaft to long?

The long shaft goes deeper, Desperado. That means it needs deeper (draws more) water.

 

[Little.desperado]

Re: shaft to long?

Ok, now i understand!!<br />Sorry, but my english is not the best!!! ;-)<br /><br />But with the long shaft the top speed is not less compared to a short shaft?

 

[JB]

Re: shaft to long?

Your English is sehr gut, desperado. Better than a lot of Americans. <br /><br />The long shaft will have more drag than a short and, yes, it will reduce top speed some.

 

[Little.desperado]

Re: shaft to long?

I see!<br /><br />Thanks a lot for your explanations!!!<br /><br />So next time i better look for a short shaft!<br /><br />Maybe i can get a damaged short shaft engine and assemble the short shaft on my engine!<br /><br />Just change the shafts! That might work!<br />Some work, but better than buying a new outboard.

 

[AJ168]

Re: shaft to long?

Make sure that it's the same model engine that you're taking the lower unit (shaft) off of that you own. You'd be pretty lucky to find a replacement that worked and would be cheap.

 

[Solittle]

Re: shaft to long?

I run a long shaft 1975 9.9 on my 12' tinny and it works just fine.