2006 50HP 4 stroke EFI Rough cold idle and surging (and stalling) at low rpm

miltonboater

Recruit
Joined
Jul 25, 2013
Messages
3
2006 50HP 4 stroke EFI

After several trips to the certified mechanic and much$$, they now tell me it's the injectors. Getting ready to send them off for cleaning. Does this sound right?

Engine starts fine and idles though somewhat roughly. If rpm's are run up to +/- 1400 to 1600 the motor will vacillate as much as 200 rpm and die. Will start right up and do the same thing. After it's run for a time at higher rpm, these symptoms get somewhat better and the motor will not usually stall.

They have hooked it up to the computer which initially indicated there was too much air in the mixture. They replace the throttle body. On the next trip in, they replaced a solenoid valve. They have had the computer hooked up as the motor sputtered and quit and say it shows no faults. Their next "guess" is the fuel injectors.
 
Last edited:

Timestep

Petty Officer 1st Class
Joined
Jul 17, 2002
Messages
204
Re: 2006 50HP 4 stroke EFI Rough cold idle and surging (and stalling) at low rpm

Did he have the genuine Mercury diagnostic commuter ? What did it say ?

Dave
 

barnicalbill

Cadet
Joined
Nov 22, 2003
Messages
15
Re: 2006 50HP 4 stroke EFI Rough cold idle and surging (and stalling) at low rpm

Hi Milton ....Any luck with fix on your MERC issues...eg mid range stalling......please let me know as I am having the exact same problem..and exact same results..a lot of time and $$$$$..thanks in advance...BARNICAL BILL
 

sdsaw

Petty Officer 2nd Class
Joined
Aug 19, 2007
Messages
188
Re: 2006 50HP 4 stroke EFI Rough cold idle and surging (and stalling) at low rpm

You may want to check the TPS (throttle position sensor) while the problem is occurring
It didn't throw a code on my 115 but was out of spec while problem was occurring
 

barnicalbill

Cadet
Joined
Nov 22, 2003
Messages
15
Re: 2006 50HP 4 stroke EFI Rough cold idle and surging (and stalling) at low rpm

You may want to check the TPS (throttle position sensor) while the problem is occurring
It didn't throw a code on my 115 but was out of spec while problem was occurring


hi sdsaw .....will check out the T.P.S. this week and let you know thx in advance. ....BARNICAL BILL
 
Top