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Evinrude 40hp outboard

This 2001 Evinrude 40 hp outboard will run just fine, but sometimes the overheat alarm goes off while running fast. The engine isn't hot, and if it is shut off, then immediately restarted, it will run just fine. If it was really overheating, wouldn't the alarm sound, and the motor shut down? It may run for an hour, or just a couple of minutes, then the alarm will sound again, and shut down the motor. Everything checks out fine, when the mechanic looks at it. What is going on? Does Evinrude have a fix for this?

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  • Boating Master
  • 3,482 Answers

First, the over heating alarm is for YOU to shut the motor down...
Replace the water pump assembly..(have a different mechanic do it!!!!!!!!!!!!!!)... they are NOT all created equal!!

Posted on Jun 13, 2017

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Posted on Jan 02, 2017

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SOURCE: what is the correct fuel/oil mix for evinrude 4hp ?

the proper mix is 50 to 1 or 16 oz to every 6 gallons,in my little boat I put 4 quarts in the 48 gal tank and its been running for 22 years,your running way to rich and your plug is probaly fouled,take it out clean it up/dump your fuel and mix it right,thats a great motor you got,I hunted with it for years,oh yeah when you get started run it till all the smoke is gone or you will have carb problems ,if you dont have them all ready,a little carb cleaner wont hurt but get it running first,or all that trash will foul you out,have a great trip bartriley1

Posted on Jan 05, 2009

  • 65 Answers

SOURCE: evinrude outboard motor starter rope

most likly is missing a washer,has been reassembled incorrectly.take apart and check

Posted on May 08, 2009

Editor925
  • 285 Answers

SOURCE: Missing operators manual for Evinrude 2 hp outboard motor

Your best bet is ebay for a replacement user manual. Take a look around, you will come across one... For the meantime, gas oil ratio should be 50 parts gas to 1 part oil, i.e. 50:1. General care: Dont go full throttle for any length of time. Cruise of 3/4 throttle... Always flush engine after use in saltwater, including washing down exterior. Keep spark plugs in good order and check prop for fishing line wrapped around in near the prop hub. Otherwise, get a yearly service and have them check the water pump and replace as needed, get it tuned etc and gearbox oil changed.

Posted on Jun 20, 2009

  • 677 Answers

SOURCE: outboard motor overheating

Mate.The powerhead(engine block) is clogged.Don,t run it anymore untill its cleaned out or the motor will cook.Take the heads off 1st and see whats in the water jackets.It will probably be blocked.A build up of white 'gunk' is the main indicator.If thats the case,a complete cleanout is needed.Hope this helps

Posted on Jul 27, 2009

  • 86 Answers

SOURCE: Motor spits and sputters

If it is old enough to have points then I would check them and make shure they are clean and gapped at .020. if that is noth the problem then it sounds like a fuel issue. Either a weak pump or a dirty carb.

Posted on Aug 06, 2009

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