Mercury main jets for WH, WMH, and WMV carburetors are compatible with a wide range of 2-stroke motors, including 2.0-liter, 2.4-liter, 2.5-liter, and 3.0-liter Mercury outboards.
These jets control the flow of fuel into the combustion chambers during both idle and full-throttle operation, making them essential for consistent engine performance.
These jets are also a critical component of the idle circuit in WH-series carburetors, further demonstrating their importance in achieving optimal tuning for 2-stroke Mercury outboards.
Here’s the full range of Mercury Main Jets available, along with their corresponding OEM part number:
40 Jet Size 0.040 Inch: Mercury OEM Part Number 1399-7570
42 Jet Size 0.042 Inch: Mercury OEM Part Number 1395-5315
44 Jet Size 0.044 Inch: Mercury OEM Part Number 1395-7394
46 Jet Size 0.046 Inch: Mercury OEM Part Number 1399-5317
48 Jet Size 0.048 Inch: Mercury OEM Part Number 1395-6246
50 Jet Size 0.050 Inch: Mercury OEM Part Number 1395-6028
52 Jet Size 0.052 Inch: Mercury OEM Part Number 1395-6359
54 Jet Size 0.054 Inch: Mercury OEM Part Number 1399-5225
56 Jet Size 0.056 Inch: Mercury OEM Part Number 1399-5213
58 Jet Size 0.058 Inch: Mercury OEM Part Number 1395-7831
60 Jet Size 0.060 Inch: Mercury OEM Part Number 1395-6487
62 Jet Size 0.062 Inch: Mercury OEM Part Number 1399-4217
64 Jet Size 0.064 Inch: Mercury OEM Part Number 1399-4216
66 Jet Size 0.066 Inch: Mercury OEM Part Number 1399-4215
68 Jet Size 0.068 Inch: Mercury OEM Part Number 1395-6029
70 Jet Size 0.070 Inch: Mercury OEM Part Number 1395-6030
72 Jet Size 0.072 Inch: Mercury OEM Part Number 1395-6207
74 Jet Size 0.074 Inch: Mercury OEM Part Number 1399-3794
76 Jet Size 0.076 Inch: Mercury OEM Part Number 1399-3796
78 Jet Size 0.078 Inch: Mercury OEM Part Number 1395-6680
80 Jet Size 0.080 Inch: Mercury OEM Part Number 1395-6201
82 Jet Size 0.082 Inch: Mercury OEM Part Number 1399-3518
84 Jet Size 0.084 Inch: Mercury OEM Part Number 1399-3517
86 Jet Size 0.086 Inch: Mercury OEM Part Number 1395-5815
88 Jet Size 0.088 Inch: Mercury OEM Part Number 1395-6202
90 Jet Size 0.090 Inch: Mercury OEM Part Number 1395-6247
92 Jet Size 0.092 Inch: Mercury OEM Part Number 1395-5733
94 Jet Size 0.094 Inch: Mercury OEM Part Number 1395-8423
96 Jet Size 0.096 Inch: Mercury OEM Part Number 1399-6249
98 Jet Size 0.098 Inch: Mercury OEM Part Number 1395-7335
Main jets are vital for ensuring your Mercury 135 HP, 150 HP, 175 HP, 200 HP, 225 HP, 250 HP, XR2, XR4, XR6, XB, Pro XS, SST-120, SST-140 and old school Black Max outboards to operates at peak performance.
Whether they are used in the idle circuit of WH carburetors or in the main fuel circuit in the WMH and WMH carburetors, the right jet size is key to:
Maximized Power Output: Delivers the perfect fuel-to-air mixture for optimal engine performance.
Engine Longevity: Prevents overheating or fouling, protecting your investment.
Fuel Efficiency: Improves combustion and minimizes wasted fuel.
It's vital you make adjustments for environmental conditions like altitude or tuning for maximum power in after you have made high-performance modifications; selecting the correct jets is like having the right tune in your ECU.
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