Trouble getting on plane

[ehughes1215]

Good evening, all! I have a 2018 Z521L with a 2018 G2 250 HO, model #E250LHOAGG. This past weekend while fishing a tournament, and my boat would not get up on plane until
I hit 3350 RPMs. Thinking it could be the spark plugs, I replaced them with the Champion (Qc8WEPI). Today I went out to see if the same issue would occur, and it did. Pulled the new plugs and noticed the plug that came out of the #4 cylinder look like this. Can anyone please tell me why this is? Thank you in advance!17250651221147961670907106215105.jpg17250651694439092688561907312463.jpg17250652106304470559442466178747.jpg

[Bighare2]

Combustion is not occurring in cyl 4. Is the plug wet or dry?
Has there been any fault codes triggered?
you need to check spark. Possibly an ignition coil or related wires.
the system will trigger a fault code for an electrical problem in the coil or electrical problem in the injector.
is the engine still in warranty?
recommend having a dealer run a diagnostics report.

[ehughes1215]

The plug was slightly wet. I got codes 114 and 115 prvt during the tournament, but no other ones. Unfortunately, it's out of warranty. Do you have any idea on how to test the coil?

[Bighare2]

Though not related to your issue, these are the meaning of the two codes.
114 Loss of NMEA 2000 network communication.EMM detects no communication on the NMEA 2000 network. Check NMEA 2000 devices, buss cables, tees and backbone cable.
115 Loss of Remote Control network communication. EMM detects no communication on the Remote Control network. Check remote control connections, buss
cables, hubs and backbone cable.
stand by on the coil test.

[Bighare2]

the best place to start is use a timing light to check for power out to the spark plug.
here is the process from the manual.

Running Ignition Tests
Use Evinrude Diagnostics software to monitor system voltage (55 V).
• Voltage readings at a specific speed (RPM)
should be steady.
• Refer to System Voltage Test on p. 122.
Use an inductive timing light to monitor the spark signal through each of the secondary circuit (spark plug lead) wires.
Start outboard and observe timing light strobe. Look for a consistent flash and only one flash per revolution. The strobe of the timing light should be the same for each cylinder.
Results:
Steady voltage and strobe, engine misfires: • Inspect or replace spark plugs
• Refer to Static Tests on p. 105.
• Check for internal engine damage.
009363
Steady voltage, erratic strobe, engine misfires: • Inspect or replace spark plugs
• Check CPS resistance.
• Refer to Ignition Circuit Tests on p. 123.
• Refer to Ignition Coil Tests on p. 123.
Voltages fluctuate, engine misfires:
• Inspect battery and connections
• Test capacitor and all ground connections. • Refer to System Voltage Test on p. 122
• Refer to Ignition Circuit Tests on p. 123. • Refer to Ignition Coil Tests on p. 123.
IMPORTANT: If a running problem occurs at about 1200 RPM, the outboard may be in S.A.F.E. Refer to S.A.F.E. on p. 89.


From the service manual…..
Ignition Coil
• Primary circuits are powered by system (55 V) voltage
• EMM provides control signal to ignition coil
• Output from ignition coil secondary winding and
high tension spark plug wire.

Ignition Coil Tests
There are no ignition coil tests available. Before replacing an ignition coil, be sure:
• 55 V is supplied to the white/red wire of the igni-
tion coil connector
• A control signal is present on the orange wire of
the ignition coil connector. Refer to Ignition Cir-
cuit Tests on p. 123.
• The black wire of the ignition coil connector pro-
vides continuity to ground.
• The secondary spark plug lead provides continuity.
If all of the above tests are good, and a cylinder does not have spark, replace the ignition coil with a known good coil.

[ehughes1215]

Thank you! Much appreciated!

[Team Mud]

similar issue, 2 times, it was the injector both times

[ehughes1215]

similar issue, 2 times, it was the injector both times

That's what I was afraid of. Thank you