2008 3.0 Merc Shudder when shifting into neutral

[Evinrude Boater]

Is it normal for these engines to shudder briefly when shifting from drive to neutral? Should it be brought to the dealer's attention when it's winterized. Also, it sometimes runs on after the ignition is turned off. WTH, it's brand new this year.

 

[Fishermark]

Re: 2008 3.0 Merc Shudder when shifting into neutral

The "shudder" is normal. The engine needs to "stumble" in order for the dog clutch to disengage.

There is a bulletin about the dieseling of the engine. Make sure the idle is not set too high, and run it at an idle speed for awhile after a high speed run before shutting off.

 

[180shabah]

Re: 2008 3.0 Merc Shudder when shifting into neutral

Shudder is perfectly normal, your 4.3 did it too, but probably not as noticable.

Most likely reason for the "run-on" is lack of cooldown time before turning the key off.

 

[Evinrude Boater]

Re: 2008 3.0 Merc Shudder when shifting into neutral

Shudder is perfectly normal, your 4.3 did it too, but probably not as noticable.

Actually, I sometimes can't tell when my 4.3 shifts into neutral. I've never noticed a shudder either. I thought the 3 liter was kinda shaky

 

[scutly]

Re: 2008 3.0 Merc Shudder when shifting into neutral

Is it normal for these engines to shudder briefly when shifting from drive to neutral? Should it be brought to the dealer's attention when it's winterized. Also, it sometimes runs on after the ignition is turned off. WTH, it's brand new this year.

the shudder is normal. its the shift interrupt system at work. grounds out the coil for a split second to take the load off the drive. it doesn't happen out of the water on muffs because there's no real load on the prop.

http://forums.iboats.com/showthread.php?p=1930449#post1930449.

the run on is called dieseling i learned. and you DEFINITELY DON'T WANT THAT TO HAPPEN ON THE WATER. i sucked water into my cylinders cause of this last week. thank god i read this forum because i saved my engine.the cause of the "run on" was high idle.