Nose Cone w/Low Water Pickup Necessary???

[Merlin509]

Two questions:

Is a nose cone with low water pickup necessary or beneficial for a boat running below 85mph?

If so, which nose cone w/lwp works best with a v6 Yamaha (1988 ProV150)?

The setup is the ProV with Phase 3 Hydrotec kit on an Ebbtide Campione 180 with a manual jackplate and 27m SS Yam prop. Top speed around 80mph.

Thanks

[matty b]

are you losing water pressure?

[Merlin509]

are you losing water pressure?

Not that I've noticed. I don't have a pressure gauge, but no warning lights have gone off. That said, I haven't really pushed it as far as height goes. I think I could benefit by going higher.

[Hoss Marine Propellers]

The nose cone is added length to the gearcase which eliminates blow-out.
Blow-out normally occurs in the low to mid 80's..... It depends on your setup & prop?
Low water pickup allows the engine to be raised, install a surfacing prop, & run a lot faster without
the fear of low water pressure & engine failure.

[JWTjr.]

Before ou buy a nosecone, buy a water pressure and water temperagure gauges, install them and keep an eye on them as you drive.

Also take a video (or have someone do so) of your boat at speed, then watch it.


If you're too high now, the gauge and/or the video may tell you. You should see at least 10psi on the WP gauge and less than 160 degrees F on the temperature gauge at high speed. The video should show, at speed, the hull breaking water behind the driver, with very little positive engine trim angle (no more than 3 degrees positive relative to the boat's angle of attack) and a roostertail, if any, that's long and low...i.e. no higher than the engine cowl.


You are right on the edge of needing a cone if the 80 you've seen is a real 80 (repeatable GPS or radar speed recordings). If you can post a video or photos of your rig at speed it would help with the determination. However, get those gauges first.

JT