Choosing the correct prop

[Dunaruna]

I had an interesting experience last weekend concerning my prop.<br /><br />I've always run a 15 x 15 3 blade alloy cupped in very good condition, perfect WOT RPM, good economy, good hole shot etc. Never had a complaint. Couple of weeks ago I lost it (long story) so I fitted my spare, a 15 x 19. My old 302 is tired so I don't hammer it, just cruise and troll. The 19" was doing the job o/k but I needed a new spare prop so I payed a visit to the local shop in the marina. The only prop he has for my boat is a 15 x 17 3 blade uncupped reconditioned prop covered in dust. It was cheap - I bought it.<br /><br />Fitted it last weekend, it's a different boat now! Hole shot is better, it turns tighter, it doesn't list as much when turning hard, it 'feels' like it bites better and the best part - economy has improved considerably (navman fuel computer). Although I don't make a practice of it I did run flat out for a few minutes, WOT RPM is well within specs.<br /><br />The moral of the story? IMO follow the guidlines when choosing a prop, but trial and error can make a big difference. <br /><br />Aldo

 

[Realgun]

Re: Choosing the correct prop

Sounds to me like you got a good prop even if it is old and dusty.

 

[walleyehed]

Re: Choosing the correct prop

but trial and error can make a big difference. <br />

Aldo, you have found the secret to finding the hidden potential of your rig...<br />A Flat-blade surprises me that it holds better, and they are almost always less efficient, but testing and more testing is the key.<br />If you like what you have, then good job.....sometimes it takes a few runs with several decent wheels to find what fits your style best...sounds like you found it.

 

[Dunaruna]

Re: Choosing the correct prop

Originally posted by walleyehed:<br />

A Flat-blade surprises me that it holds better, and they are almost always less efficient

It surprised me as well. In fact because it was the only one left in the shop, and I didn't really want an uncupped prop, the salesman gave me a money back guarantee. Needless to say, I'm keeping it!<br /><br />My outdrive is very deep in the water, would that make a difference?<br /><br />Aldo