How to measure Height and Setback

[Greggw/2g's]

I have a 2004 Hydrostream Voyager. Just had a 2010 300xs put on it and I wanted to know how to measure prop height and setback. I have a 8'' jack plate but the stern has a notch in it putting pad further foward

[mirage243]

Set back is the length of jackplate you have which is 8". To measure your prop height, you need to get your boat on a level piece of concrete. Then put a level on the bottom of the pad of the boat and run the trailer jack up or down until you have the bottom of the pad level, next remove your prop and put a small level on the prop shaft, then run your trim up or down until the prop shaft is level. After both the bottom of the boat and prop shaft are level then get a long straight edge and extend it off of the bottom of the boat back to the gearcase and see where the center of the propshaft is in relation to the bottom of the boat. If you are absolutely sure that the concrete surface you are working off is level you can measure from the concrete floor to the bottom of the boat and then measure from the concrete floor to the center of the propshaft. The difference is your propshaft height. Hope this helps.

[HStream1]

Set back is the length of jackplate you have which is 8". To measure your prop height, you need to get your boat on a level piece of concrete. Then put a level on the bottom of the pad of the boat and run the trailer jack up or down until you have the bottom of the pad level, next remove your prop and put a small level on the prop shaft, then run your trim up or down until the prop shaft is level. After both the bottom of the boat and prop shaft are level then get a long straight edge and extend it off of the bottom of the boat back to the gearcase and see where the center of the propshaft is in relation to the bottom of the boat. If you are absolutely sure that the concrete surface you are working off is level you can measure from the concrete floor to the bottom of the boat and then measure from the concrete floor to the center of the propshaft. The difference is your propshaft height. Hope this helps.

:thumbsup::thumbsup: Dam Bill couldn't have said it better my self. The only things I could add to what Bill mentioned is. If you are on a sloped surface (like a driveway) you can use a 4' level or a 2x4 and chock it to level on the driveway and measure from that in lieu of the concrete surface. Now you can raise and lower the engine in 1/4" incriments untill you find the boats sweet spot. And as always monitor water pressure.

[Greggw/2g's]

Thanks for the info.

[Freddie Webb]

Adding to what Bill said usually for every inch of setback you can go up an 1/8.