Propellers

2 thoughts on “Propellers”

  1. Scott,

    As per our earlier conversation in the Pro Max prop section, I recently purchased a 32″ lab finished Pro Max, which has yet to be run. My question is about the PVS plugs: How do you insert them? And does using or not using them affect top speed? I’m not concerned about hole shot.

    I tried tapping them in with a rubber mallet, then a hammer, then placing then in hot (tap) water for several minutes before inserting them, all to no avail. I was afraid I’d break the plastic if I used any more force.

    I have my 300X gearcase centered about 1 1/2″ above the centerpod on my Stoker 22 Mod-VP hull, which causes the engine to rev up fairly high getting on plane anyway. I have an earlier 30” lab finished Pro Max without PVS holes, and I’ve used the Pro ET and Lightning ET over-hub exhaust props before and had no problems with any of them. So am wondering whether it will really make any difference whether the plugs are put in or left out in my application?

    Thanks for your comments.

    Lee King

    1. Lee,
      The venting system is designed to bring the boat on plane. At 70 mph, there’s 100 lb.ft of force applied to the gearcase/propeller, minimizing any exhaust escaping out the holes. The Pro Max’s small barrel enables the exhaust to flow through and over the barrel. This aerates the water around the propeller – similar to the what the PVS venting system does. With some applications, the gear ratio and taller pitch props require added aeration from the PVS vent holes. Installing the fittings can be tricky. Place the propeller on a work bench. Align the tapered side of the fitting over the PVS hole and hit the fitting squarely and forcibly with a plastic hammer.
      Scott

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