Evinrude Spark Plugs

Hello my name is Bob and I have a 1988 Evinrude VRO 140 and it idles ruff and at low rpms it will stall, but at full or half it runs fine it's on a 1988 17 ft ranger bass boat and will run 56 mph.

I guess my question do you think it's the plugs or maybe something else, plus I was wondering it has QL78YC champion plugs but says I can run QL16V I was wondering if there are other plugs you would recommend. 



Have the engine checked for compression and general condition, then move on to the low speed part of the carbs. The plugs are not idle related.




Please submit whatever questions you have to IHRTechTalk@yahoo.com.  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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