Mercury PVS
 

I have a Mirage prop with the "performance vent system". Has anyone played with those plugs and the sizes on it? Curious to the difference it makes.
250 Shabah 7.4/ BravoI

Re: Mercury PVS
 

If I remember right, venting allows the prop to slip when getting out of the hole so the rpm's get up into a higher HP band. The smaller the holes, the less slip when accelerating.

I've seen them used more on bass boats and the like. Lets them run higher pitch props and still get out of the hole. Had a vented prop on my Astro, but I've never tried one on any of my cruiser boats.

Try the prop without any holes first. If you're dogging at low rpm while getting on plane, open the vent to the smallest size and try it again. Each bump up in vent size should allow your rpm to be higher while getting on plane... to a point. Too big of vent holes will create too much slip and not provide enough bite on the water, almost like riding the clutch on a stick shift car.

Re: Mercury PVS
 

Thanks for the reply! Just like you said I had not heard if anyone doing that on a cruiser like my Shabah. I know my dads buddy tinkered with it on the bass boat before we got it from him. I was just curious if the bigger boats would benefit. I don't have any of the plugs except the solid ones. The replacement plugs are like $3 a piece X3 pieces and 3 sizes so probably around $35 with shipping to play around with the PVS deal.
I only bring it up because a guy mentioned "drilling" a prop to me yesterday. I was thinking that drilling a $500 dollar prop sounds.... Ridiculous! But I am aware my current prop all ready has holes in it- they are just plugged!
If I get some new plugs I'll follow up on here.

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