Motor goes off (in warm weather)

[kurz]

Hello
Unfortunately my Mercury 60 hp EFI has the following problem:

It can work properly.

But especially in warm/hot weather it goes off. Just stops.

Who has an idea what the problem is?

Here two videos, maybe you can "hear" the solution???

https://drive.google.com/open?id=0BzaJz ... authuser=0

https://drive.google.com/open?id=0BzaJz ... authuser=0

Thanks for any help.

Kurz

[Russ]

I am no mechanic. However, that sounds like a fuel problem. Maybe seeing that hose in the top of the tank made me question fuel. Have you checked filters? Water in the fuel?

[Russ]

An idea from another thread: "When was the last time the water pump impeller was replaced"? Does the display indicate the engine temperature?

[133bhp]

sounds like running on 2 cylinders, also like a air leak - maybe the intake?

[Russ]

sounds like running on 2 cylinders, also like a air leak - maybe the intake?

Would that change from warm temperatures? That is what he is reporting.

[RobertB]

Warm weather means different fuel air mixture, an elevated engine temperature, air leak, and/or possibly a vapor lock situation.

Is the temperature warning light hooked up? (I ask because my gauge light's wiring was cut through the way Mac Factory sales wired the engine harness too close to the motor flywheel. If hooked up you will see it go on when starting the engine.) Does the light indicate a hot engine?

Does pumping the fuel prime bulb help?

Can you cool any one area to get the engine started again (fuel tanks, fuel lines, engine)? Does anything feel abnormally hot?

Have you tried switching fuel tanks? Have you tightened the clamps on the fuel lines?

[sailboatmike]

A good rule of thumb for finding issues is " If its stutters and dies its fuel but if it just dies its electrical" - logical when you think about it

[[Fraid-Knot]]

I have experience with outboards... My advice,
Start with the simple stuff. I would make sure you have met all of your engine's needs starting with fresh fuel and a tune up (especially if it's been sitting up). Meaning changing oil, filters, spark plugs, etc. If it still cuts out at idle, try adjusting the idle at the linkage on the outboard. I also would install a water separator filter between the tank and engine if you haven't already. Don't attempt the technical stuff without doing your homework, or just let a boat shop do it.
Boat motors typically need more attention than other engines due to the environment they operate in and the fact that they are often laid up in the winters. Be religious about flushing, and before storing the boat, winterize it...even if you are in a warmer climate.
A happy engine makes for happy days out on the water!

[kurz]

thanks all.

Any idea how to check the fuel check pump?
I worked a lot with older motorbike motors (like AfricaTwin) and my 28years old mercedes 124.

But I just did nothing with the mercury.

So where the fuel pump is mounted?

Can I check it?

Thanks all!

[Russ]

Again, I'm a lousy mechanic, but check the simple stuff first.

One of my jetskis would not get power. Couldn't get on plane. I read stuff that said, fuel. Old fuel lines clog up carbs. Made sense, it sounded like it was starving for fuel. So I replaced all the fuel lines and rebuilt the carbs. What a job. You must have tiny hands to get in some places. Still no joy. After all that work, no difference.
Someone suggested spark plugs. I thought, the plugs are like new, can't be that, but they are only a few dollars so I replaced the. THAT WAS IT! The thing runs like new again and it was......spark plugs.

I'll never forget to try simple stuff first.

Kurtz...I would try new fuel..maybe new plugs...make sure the water pump indicator is spraying water out the hole. Simple stuff. Fuel filter maybe.

[133bhp]

also sounds like a slight misfire at high revs on the first vid, coils typically breakdown at higher temps/revs/load.

second vid; there seems to be a pipe missing on the the small component there, some kind of fuel vapour separator? sounds like source of the hissing? What year is the engine, I can try and look it up?

sounds odd to me, but If the pipe/hissing turns out is normal? then could just be a plug or coil? Pull the plug leads one at a time when idling to see which if any cylinders do not make it worse? then that's the culprit. Then you swap plugs/coils to isolate further. i.e does the fault follow the plug or coil?

[kurz]

What year is the engine, I can try and look it up?

bought in 2011

[133bhp]

they go by engine number apparently...

looks to me its a solenoid, could be a solenoid pump for the water cooling of the fuel vapour separator?, which may be causing a feul vapour lock , hence worse when hot?

check a water inlet tube has not come off as it should have something on it? suspect why its hissing?

[kurz]

What year is the engine, I can try and look it up?

bought in 2011

Mercury F60ELPT BF EFI, 1c149551

Do you know what this valve (photo) exactely does?
It controls air. And if you open/close it with your finger you can bring the motor off.
So maybe this little thing does not work properly and brings the motor down?
Anybody knows more?



Thanks!

[133bhp]

My guess is then (given I've a two stroke) its an idle air control valve. one end will be open to atmosphere as shown. your shutting off enough air to the intake when you block it.

The ECU should control it, but gets stuck when hot? or probably is stuck open, when cold the mixture might be rich enough to compensate to a degree?

Try covering it little by little with you finger, see what happens to the idle? try taking it apart or replace.

you should/might get a ecu code if the solenoid is not switching?