2003 200HP EFI Cylinders not firing

[Howie 11]

My 2003 EFI 200 HP has started running real rough at idle. Took it in and they stated cylinders 4 & 6 not firing, but they seem to come alive on higher idle.
Initial thought was fuel injectors, or reeds.
Anyone have this issue? Or ideas of what may be.

[leonreno]

If you could read the announcements at the top of forum, serial number is required for optimal help.

You said you you took it in, could they not tell you what was causing the no fire?
first thing is to check for spark on those/all cylinders.

[Howie 11]

Ser # OT748149
The mechanic suspected fuel injectors and wanted to change all 6.
Due to price of themI was hoping to see what others thought.
They swapped coils around and stated that it didn't make a difference in the rough idling, leading them to believe this was a fuel problem.

[JOE54]

+1 does it have spark or not on all 6

[Howie 11]

All 6 have spark. Pulled caps one at a time and it seemed only cylinder 2 didn’t make it run any rougher.

[JOE54]

so he gonna change all 6 cause one is bad or something else, find another tech

[SilverFox579]

so he gonna change all 6 cause one is bad or something else, find another tech

^^^^

[HopSeng]

hoping Don Weed or Savage can help out here

[SilverFox579]

Joe54 is an outstanding Mercury technician/dealer so you can take his advice to the bank. Yessir.

[EuropeanAM]

Joe54 is an outstanding Mercury technician/dealer so you can take his advice to the bank. Yessir.

100% Agree!

I would be checking ALL of the basics- and inspecting the REEDS (not replacing all six injectors, which is a generally expensive and lazy approach).

[Howie 11]

Thanks guys. I will be checking around

[JOE54]