lifting motor up a couple inches from transom???

[corbin5754]

I have a 88 evinrude xp 150 and am looking for a little bit more speed can i gain some speed by lifting my motor up a couple inches thats about all i can lift it from the transom by the optional bolt holes u can use from the motor i dont wanna mess with a jack plate but just courious if i can gain anything from lifting motor 2 inches higher.

 

[cdn-pk]

Re: lifting motor up a couple inches from transom???

will the cavitation plate be level with the bottom of you boat?

Do you currently have after market hydro foils on the cavitation plate? Have you noticed any problems with cavitation?

the reason i ask it that you increase you chances of cavitation if you raise the motor. i don't believe i ever remember seeing or reading about an overall increase in top speed. i know if it is sitting too low presently raising it will help it get on plane faster.

have to wait for some "experts" to chime in

 

[wilde1j]

Re: lifting motor up a couple inches from transom???

Forget about AV plate level with bottom. Raise motor until top of AV plate runs dry at WOT. If you have a trailer, easy to do:

1. Park on a level, paved surface
2. Block car wheels so it can't move
3. Motor vertical
4. Place wood blocks under skeg until only small space
5. Remove upper engine to transom bolts
6. Raise tongue jack on trailer until slight load on skeg blocking
7. Loosen, but DO NOT REMOVE lower engine mounting bolts in slotted part of motor bracket
8. Continue extending tongue jack until hole you want lines up with bolt hole
9. Replace upper bolts
10. Tighten all bolts
11. Retract tongue jack
DONE