Forester/Johnson 115

I have a 1973 Forester that is 16'6" long.  It currently has a 1977 Johnson V4 115hp outboard on it.  I have no idea what model this boat is, what the max hp is, weight, or anything.  I know you are a Hydrostream site but I figured you see a lot of other fast little boats and may have an idea.  I could also send you a pic if need be.  I am also having trouble getting speed out of it.  I was told when I bough it that the PO got pulled over on the lake for doing 61mph.  When I first got it it seemed very very fast but seemed to drop off as time has gone by.  Now that I have a speedo I only get about 35-38mph out of it.  I am planning on putting 140hp carbs on and seeing what that does.  Please send me all the info that you can about this boat of mine.  I love the hull and it really handles like it is on rails with the trim in the bottom hole.  Thanks    Zach


I have run some of these boats. The 61 mph figure is most likely very optimistic. If you do not have power trim, get it. This is most likely why you are stuck in the mid 30’s. Forget the carbs, nothing will happen. Trim it out and you will get “50ish” out of it.



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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