spare prop

[jsimms724]

gentlemen I picked up my boat at the begining of this season im pretty happy with it


17ft fiberglass fish n ski with mercury 115 hp inline six it came with a s/s prop i dont know the pitch as the prop is not marked it seems to work well 5300 rpm 43 mph wot I am thinking i need to get a spare prop,nothing fancy just a back up plan, however i am clueless as what to get ? also while i have your attention this motor has a huge hydro-foil .what purpose do these serve, maybe keep the bow down a bit ? What will change if i delete it personaly I think it looks kinda dumb back there.

 

[jestor68]

Re: spare prop

It's generally accepted that the hydrofoil will make the boat plane off faster and stay on plane at a slower speed.

The trouble is; there are all different shapes and sizes of hydrofoils. One is pretty good; most are horrible.

Taking it off will possibly raise your top speed by several mph(if it's what I think it is. The good one is not huge). But it may not plane off quite as fast.

Your WOT rpm of 5300 sounds fine, as the in line 6 115 rpm range is about 5000-5500. You may have to remove the prop to find the size markings. Sometimes they are on the hub under the prop nut and washer.

 

[jsimms724]

Re: spare prop

ok so i deleted the big hydrofoil.went for a short run, boat had a bit more top end other than that no change hole shot was about the same rpms about the same. so should I fill those holes with jb or something thanks in advance

 

[jestor68]

Re: spare prop

ok so i deleted the big hydrofoil.went for a short run, boat had a bit more top end other than that no change hole shot was about the same rpms about the same. so should I fill those holes with jb or something thanks in advance

Good old JB Weld works fine. Sand smooth and paint, and you'll never know they were there.