Viper with Modified 150

I have a 77 viper its on a full restoration from top to bottom, front to back.   Its almost done but my question is??  I have put together a 150 inline 6 it has a modified short shaft midsection (has exhaust port like the v6 outboard offshore style) and it is running a newer style 89 model foot with a nose cone.   The motor has been bored 15 over 2 ring pistons it has a twister lightweight flywheel and it has some little tricks done to it.   I stuck this motor on my boat without a jackplate and the trim not hooked up with the motor down it hits the transom so I need a set back.   I was wondering what should I use 5 in jackplate or solid setback and about where should I set the height.   This is a pleasure boat it will never pull a skier just me and my son or some passengers.  So I need the best setup and prop size.   Iím going for speed so I can sacrifice the hole shot for top speeds so if you help me I would be most thankful.

Also I have a 26p chopper, 26p small ear chopper, 28p cleaver, 22p and 26p laser 2 so I have a few if you can think of anymore sizes or brands I should try let me know.

All your props will work and give you some versatility. You may have to come up with some custom plate of some sort. The exoticness of the motor will warrant this. Coming up with one to work with the in line style of trim is the hard part. Check They have a big selection.




Please submit whatever questions you have to  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


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