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I have a 2018 Mercury 4 Stroke. 4 times now, the engine has cut off and won't restart for a while.

Posted by Rod J on

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5 Related Answers

Daryl Spindler

  • 6 Answers

SOURCE: my lawnmower engine cuts out

I was having the exact same problem with my 6.5 hp Toro lawnmower with a Tecumseh engine. The engine would start up okay but after a few minutes of mowing, the mower would start missing and eventually shut down. I would pull and pull and pull on the starter rope, getting angry and frustrated and eventually going back in the house to let it cool down.

I looked up all kinds of information and I finally decided it was a bad coil (something about the resistance being low when the mower wasn't hot and then when it heated up the coil would conduct enough electricity to somehow make the engine shut down.)

I called a local shop and wanted to get an estimate on replacing the coil. I have no clue about engines so I dared not get into the guts of the mower myself. He told me to check the gas cap. HUH??????

He told me to make sure there wasn't a part missing out of it. I thought, what the heck would a gas cap have to do with the engine shutting down. Well, apparently there is a mechanism on these caps that prevents a vacuum from pulling on the fuel system and my gas cap indeed had a part missing. To verify this, I cut the grass for about 5 minutes. When it started to run rough, I took the gas cap off to allow pressure to escape from the gas tank and voila! it started to purr like a kitten.

So, I'm only out $4 for a new gas cap and I'm as good as new. Man I wish I was more mechanically inclined so I hope your problem is as easy to solve as this one.

Hope this helps!

Posted on Apr 14, 2009

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Anonymous

  • 20 Answers

SOURCE: issue with a 2004 40 hp 4 stroke mercury engine,

have you checked to see if there are any blockages

Posted on Jul 31, 2009

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Anonymous

  • 1 Answer

SOURCE: Re-assembling lower unit of 40HP Mercury 4 stroke

I found a lower gear case assembly diagram at http://www.crowleymarine.com/mercury_parts/6995/240.cfm which helped me understand how the shift mechanism works. This clued me in to the fact that I was missing the cam follower rod which I then found I had inadvertently mopped up in a shop towel when cleaning up spilled gear oil. After that discovery, assembly and operation was quick and successful.

Posted on Nov 12, 2009

thomasnee

  • 677 Answers

SOURCE: 4 stroke 6hp mercury outboard -brand new first

????? Was the dealer using his fuel tank or yours.Might be a blockage or contaminate in the fuel tank.Hope this helps

Posted on Dec 03, 2009

goldbill

william moore

  • 184 Answers

SOURCE: 30 hp 4 stroke carburator problem

Check your "sync n link" of the throttle pick up and the ignition timing.

Posted on Oct 14, 2012

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