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Honda Engines All Years GX GX390RT2 VZC2 Parts
GX390RT2-VZC2

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Engine Specifications for
GX390RT2-VZC2

ModelModelGX390RT2
TypeVZC2
EngineEngine Serial Number PrefixGCBCT
Engine Starting Serial Number1000001
Engine Ending Serial NumberN/A
Valve ClearanceIN: 0.15 ± 0.02 mm EX: 0.20 ± 0.02 mm
CompressionDecompressor engaged: 711 ± 123 kPa (85 ~ 121 psi) @ 600 rpm Decompressor disengaged: 979 ± 193 kPa (114 ~ 170 psi) @ 600 rpm
Engine OilSAE 10W-30 API service category SJ or later
Engine Oil Capacity1.16 qt.
Engine SpeedIdle: 1,400 ± 150 rpm Maximum: 3,850 ± 150 rpm
TransmissionTransmission Oil Capacity1/2 reduction: Lubricated from engine crankcase 1/6 reduction: Lubricated from engine crankcase
FuelFloat Level13.2 ± 1.3 mm (0.52 ± 0.05 in.)
IgnitionSpark PlugNGK BP6ES NGK BPR6ES
Spark Plug Gap0.7 ~ 0.8 mm (0.028 ~ 0.031 in.)
MiscGreaseLithium based multi-purpose grease NLGI #2 or equivalent and water resistant molybdenum disulfide grease and marine grease (water resistant urea based grease)
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