ideal rpm for installation of a jack plate

[lenny7683]

i currently own a 1994 18' staratos f&s with a 150 johnson out board. i recently installed a 10" jack plate what should be the best rpm/performance? for adjustment????

 

[Hooty]

Re: ideal rpm for installation of a jack plate

Hey lenny,<br />Check your manual and see what the rpm redline is (55-5800). This is what you want the engine turning when you're wfo. That's what you adjust the engine height to if you're proped right.<br /><br />c/6<br /><br />Hooty

 

[JB]

Re: ideal rpm for installation of a jack plate

Yeah, Lenny. Like Hooty says.<br /><br />But what do I do about trim?<br /><br />AHA, There's the rub, Matey!<br /><br />With prop selection plus both adjustable trim and adjustable height you now have a three dimensional problem which will take 16 times as many trials as simply selecting a prop.<br /><br />When you get the ideal prop-trim-height combination, the following will be true:<br /><br />WOT will get the top of the operating rpm range.<br /><br />Mph will be as fast as that boat will go with that combination of load and hardware.<br /><br />As soon as you get it perfect, the boat load will change or move and all adjustments are now off.<br /><br />Good luck! It's not really as bad as all that unless you get obsessed with one more tenth of a mph.<br /><br />Red sky at night. . . <br />JB