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QL87YC - Champion Spark Plug ( #934M)

Champion QL87YC - Champion Spark Plug ( #934M)

List Price
$5.46

Your Price
$4.25
You save $1.21

Add to shopping cart10+ In Stock.

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SPEEDY DELIVERY
30-DAY RETURN
FULL WARRANTY

Part Number
QL87YC

Manufacturer
Champion

Replaces OEM 0437686.

Plug Type QL87YC
Seat Type Gasket
Hex Size (Inch) 0.813
Hex Size (MM) 20.650
Thread Size (Inch) 0.551
Thread Size (MM) 14.000
Thread Reach (Inch) 0.5
Taper Diameter (Inch) 0.31
Installed Height (Inch) 2.24
Insulator Projection (Inch) 0.06
Gap (Inch) 0.027-0.033
Gap (MM) 0.69-0.84
Center Electrode Diameter (Inch) 0.1
Center Electrode Material Nickel Copper Alloy
Ground Electrode Material Nickel Copper Alloy
Ground Electrode Quantity 1
Classification Champion Copper Plus Small Engine
Resistor Plug Yes
Resistor Type Q-Type Inductive Suppressor
Manufacturer Heat Range 87
Electrical Terminal Type Non-Removable Nut

Technical information (PDF)
Warranty (PDF)
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Champion Champion Plug (#934m) Ql87yc is equivalent to parts:

  • 503954 Evinrude Johnson OMC BRP
  • 503950 Evinrude Johnson OMC BRP
  • 437686 Evinrude Johnson OMC BRP
  • 934S Mercury Marine
  • 896329934 Mercury Marine
  • 33896329934 Mercury Marine
  • 33   934S Mercury Marine
Champion Catalog Online


Champion spark plugs use an extruded copper core in the center electrode that maintains accurate control of heat range, optimizing the performance and longevity of the spark plug. This not only will provide you with a dependable start but gives you the confidence that you'll keep going.

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