Is this the correct prop?

[sceptre]

I have a alumacraft trophy 180 and a 2005 johnson 115 4 stroke. The prop is a omc 14x21 alluminum max rpm is 5800 and the loaded weight of the boat is about 3000 lbs.<br /> The reason I am asking this question is to get the rpm up I have to trim the engine pretty high, if I go into any kind of a turn the prop blows out. For any kind of a holeshot I need to trim the engine completely down. <br /> Speed is at 36.5 on the gps I dont want to loose any more speed but the handling must be improved. Any recomendations on how to improve the handling and keep my hand away from the trim switch so much?

 

[rickdb1boat]

Re: Is this the correct prop?

You are close on the RPM's. What is the cavitation plate height in relation to the bottom of the stern? Even, Below, above?? You may be able to raise the motor up a notch or two and gain the RPM's you need. If not or it is correct, going to a 19" pitch should get you where you need to be... Let us know..

 

[LubeDude]

Re: Is this the correct prop?

Originally posted by sceptre:<br /> Any recomendations on how to improve the handling and keep my hand away from the trim switch so much?

Get used to it, thats the way they work.

 

[Mischief Managed]

Re: Is this the correct prop?

A prop with more cup and perhaps more rake should help prevent the blowout in turns. When I switched to a raked and cupped SS prop, I was shocked at how much more I could trim up and still not blow out on my old boat.

 

[ob15]

Re: Is this the correct prop?

Having to trim in a little in turns is normal for a boat that is set up pretty good.<br /><br />A SS prop with some nice cup would help a lot. You would probably have to drop to a 19" pitch though. <br /><br />What is the max rpm for this motor?