Dhadley, Set -up question ?

[KYHunter2]

Hi Sir,<br /> <br /> I have the motor I rebuilt broken in , finally.<br /> <br /> It is set up , with anti- ventilation plate, approx. 2 " above bottom of hull. Second hole from top.<br /><br /> I have run a aluminum ( stock I think) 13 X 19 . I get 5200 rpms , with , best I can figure average load.<br /><br /> I also had tried a 12 3/4 X 21, SS , all I know is its a michigan wheel prop.<br /><br /> I only had 4800 rpms with it.<br /><br /> The boat is a 15' 6" Procraft, bass boat. Motor is a 78ETL115.<br /><br /> Other then the rpms , the motor does great on boat.<br /><br /> It gets out of the hole great with either prop. It will run on plane ,down to about 20 mph. <br /><br /> There is little more then the prop and pad in water, when trimmed up.<br /><br /> Handles perfectly, in turns.<br /><br /> I didn't notice much difference in WOT speed between the two props. Right around 45 mph , GPS.<br /><br /> What do I need to do to get my rpms up ???<br /><br /> Do I need to drop down to a 17 P prop ??<br /> If this is what you recommend. <br /><br /> Can I get by with an aluminum prop ???<br /><br /> I dont have the extra cash ,for a $200.00 + SS prop , right now .<br /><br /> I'd be glad to trade someone the 21 SS for a used 17 SS . If this is what I need.<br /><br /> Thank - You,<br /> <br /> KYhunter

 

[KYHunter2]

Re: Dhadley, Set -up question ?

ttt

 

[Dhadley]

Re: Dhadley, Set -up question ?

We could try going up a tad with he 19 but being aluminum I'm afraid it will start losing bite rather quickly. I'd hate to drop to a 17 without testing a ss 19 though.

 

[KYHunter2]

Re: Dhadley, Set -up question ?

Dhadley , so do I need to try to borrow a ss 19 ? <br /> Is there usually a rpm difference from alum. to ss ?<br /> When you said up a tad , I dont have a jack plate . <br /> Would this mean a hole up ?<br /> I have very little experience with set up .<br /> I ran it with the alum again yesterday , and it is right at 5200 , just wanted to confirm.<br /><br /> Thanks,<br /> KYHunter

 

[Dhadley]

Re: Dhadley, Set -up question ?

Raise the motor 1 hole and see how the rpm responds. Dont worry, at this point, if the prop vents on take off or in sharp turns.<br /><br />If you could borrow a 19 that would be great.

 

[KYHunter2]

Re: Dhadley, Set -up question ?

Sorry , I didnt reply sooner. <br /> <br /> I checked on , a prop to borrow. I can get one .<br /> <br /> What I wanted to ask was . <br /> <br /> On my hydrosport , you could trim too high . And prop would lose bite/ ventilate .<br /> <br /><br /> On this one you cant. <br /> <br /><br /> Should I be able to trim too high ??<br /> <br /> If I understand , what I just said, is answered. By doing what you said. <br /> <br /><br /> I'll raise it a hole, first chance I get.<br /> <br /><br /> How much will this effect , getting on plane?<br /> <br /> Or is it a wait and see , and go from there ??<br /> <br /><br /> This part, is kind of fun .<br /> <br /><br /> I'm interested in, what the difference will be .<br /> <br /><br /> Its like a new toy, when you change something. <br /><br /> And take it to lake, the first time.<br /><br /> Thanks for your help, and time.<br /><br /> KYHunter

 

[Dhadley]

Re: Dhadley, Set -up question ?

A general rule of thumb is that if you can use 100% of the trim range you can probably raise the motor with that given prop / hull combo. Raising the motor reduces drag which increases overall efficiency. Which includes holeshot.

 

[KYHunter2]

Re: Dhadley, Set -up question ?

Dhadley , <br /> Im still workin' on raising motor. Its been raining, the last couple days. <br /><br /> As soon as I get it raised , and to the lake . I'll post results.<br /><br /> Thanks,<br /> KYHunter

 

[Dhadley]

Re: Dhadley, Set -up question ?

Send the rain here.