Viper

[hydro1]

Hi all,

Just a quick question: I will be putting my 82' 150 crossflow v6 on a viper. WHat is the ideal setback (6"') and engine height>? should it do over 75 mph (compression and leakdown are perfect). Thanks alot! Motor is on a 16' checkmate and i really want some more speed.


Brandon

[Riverman]

From what I've read, Vipers need very little setback, if any. There is already setback built into the transom. If you want the adjustability without much setback, use a Bob's convertible 4 in 1 jackplate. It can be changed to either 2 1/2 to 5 inch setback.

RM

[Paul Vaillancourt]

I have a 1990 150XP Evinrude on my Viper right now, It has 5.5" of set back, a CMC hydraulic jack. I'm not saying that this is the best set up but it is all I have.....my best so far is 77mph on GPS using a 29 pitch OMC SRX by DAH. The lower has a land and sea nose cone and prop shaft is 1-2 inches below the pad.
Hope this helps
Paul

[viper15]

As little as possible. I had a 235 johnson bolted to the transom as high as can go. those motors are way to heavy on a viper. it went 84.3 on GPS. Bolted a 2.4 200 on a jackplate and with 6 inch set back and went 87.2. and the bow hardly lifted to plane off. the best bet would be a bobs jack plate inverted which gives you about 2 inches set back and run the prop shaft about 1/2 inch below the pad. Good luck

ps try a 26 chopper should work good and a cleaver is what I prefer.

[hydro1]

Hey thanks alot guys really appreciate the help. Ill post some pics when i get here up and running.

Brandon