Mercury 200 OptiMax Jet Drive Service Manual page 221

Direct Fuel Injection
2. Use a cotter pin extractor tool to gently pry up on the fuel injector to loosen the O‑ring adhesion to the fuel rail and remove
the fuel injector.
3. Use the DMT 2004 digital multimeter to check the resistance between the fuel injector pins and the fuel injector steel body.
Replace the fuel injector if it is not within the specifications.
NOTE: The fuel injector ohm test is not polarity sensitive.
O N
O F F
Red
Injector pin
Injector pin
DMT 2004 Digital Multimeter
Page 3B-58
b
a
8355
a - Fuel injector
a
8309
Meter Test Leads
Black
Injector pin
Injector steel body
a - Screws
b - Pry holes
Meter Scale
Auto
Auto
91‑892647A01
Reading (Ω)
1.8 ± 0.1
No continuity
90-8M0050731 MAY 2011