Mariner Trouble

Hi I hope you will be able to help me! I have a 1979 Monark with a 115 horsepower Mariner motor with a 24 pitch prop. Recently I have had trouble getting it to plane out. Then while running down the lake it lost all power and would not plane back out. It would go in reverse fine and only at idle speed in forward. Any ideas on what might be my problem? Thank you so much for any input you may have.




First place I'd look is in the shift throttle linkage area. Sounds like something broke. Try some vent holes if the prop is a thru hub - add some blade roll if it is a chopper. 




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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