Adjusting Crank Position Sensor?

Salty Dog

Petty Officer 1st Class
Joined
Feb 24, 2002
Messages
290
Re: Adjusting Crank Position Sensor?

Setting up a used 250 TXRR and want to double check everything. It seems to run good but has a lean sneeze. I ran some Seafoam through it and it idles better. Going to take it out today for a quik ride.

JUSTINTIME has that Merc F115 manual that you recommended but he says it only gives wire colors and doen't tell you how to make a winky blinky.

I might try to sync the carps and the TPS again incase I did it wrong. Is there a way I can check the timing on this motor?

Thanks
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Adjusting Crank Position Sensor?

timing can be checked like any other spark engine with the use of a standard timing light.
lean sneeze will have NOTHING to do with the CPS or the TPS and everything to do with correctly set up carbs and clean carb passages.
be aware that motor is CCS controled and may not spark on 2 cylinders sometimes one cylinder depending on RPM.
the CPS position is pretty much fixed by the screw positions but the resistance and the output can be tested.
I will be gone for 2 weeks,1 week in Orlando and another at a Yamaha school in kennesaw.
if you still need the wink blinky Ill look up my merc manual or find the K&L part number.
if your timing ever defaults to 7* BTDC and it idles fast look for a failed sensor or incorrect sensor outputs.
timing on that engine is computer controled by inputs from various sensors.
at a warm idle,code 1, you should see about 6* ATDC and about 18* BTDC at WOT.
the pulser coil mounting location is physically set at 7* BTDC so if something fails idle speed/timing will revert to the fixed timing and will be about 1100 RPM. depending on what failed will determine if any additional advance is given.
 

cousinabe

Senior Chief Petty Officer
Joined
Nov 13, 2001
Messages
765
Re: Adjusting Crank Position Sensor?

I bought my winky blinky from boats.net for $96.78

Diagnostic Test Lead Updated YB-06795
Known as "Winky Blinky". The indicator light is used to identify an engine self-diagnostic warning code.
Consists of YB-06444 & YB-06794

http://www.boats.net/parts/detail/Y-YB-06795.html
 
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