Fuel Pump Assembly for Mercury Mariner 30-300 HP 2 Stroke Outboard 14360A78 14360A71 14360A43 — United Kingdom Local Warehouse
Fuel Pump Assembly for Mercury Mariner 30-300 HP 2 Stroke Outboard 14360A78 14360A71 14360A43 — United Kingdom Local Warehouse
Product Overview
Fuel pump assembly for Mercury and Mariner 2-stroke outboards, a direct-fit mechanical pump covering 30 HP to 300 HP motors built between 1986 and 1993. It replaces 14360A78, 14360A71, 14360A73, 14360A50, 14360A43, 14360A41, 14360A27, 14360A24, 14360A16, 14360A15, 14360A14, 99357A4 and 8M0036779. Dispatched from our United Kingdom local warehouse.
The pump is driven by crankcase pulses and feeds three carburettor outlets, so it is not a generic low pressure pump you can swap from a car. Inside there is a diaphragm and two check valves, and when the diaphragm stiffens the pump still runs, still ticks over, and still lets the boat leave the mooring. The trouble starts at planing speed, where the float bowls drain faster than a tired pump can refill them.
British boats on swinging moorings see this more than most. Ethanol blended fuel sitting in the pump over winter attacks the diaphragm and the check valves, and the first run of spring is when a lean sneeze at idle turns into a cylinder that will not pull. A serial number check against the table below is the only reliable way to confirm the pump fits your motor.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Fuel pump assembly, mechanical |
| Engine | Mercury and Mariner outboard |
| Stroke | 2-stroke |
| Horsepower Range | 30 - 300 HP |
| Years | 1986-1993 |
| Outlets | 3 |
| Fuel Pressure at Idle | 3-7 psi |
| Mounting Torque | 60-84 in-lb |
| Drive | Crankcase pulse line |
| Shipping Weight | 267 g |
| Packaging Size | 16 x 12 x 10 cm (6.3 x 4.7 x 3.9 in) |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| Mercury | 14360A78, 14360A71, 14360A73, 14360A50 |
| Mercury | 14360A43, 14360A41, 14360A27, 14360A24 |
| Mercury | 14360A16, 14360A15, 14360A14 |
| Mercury | 99357A4, 8M0036779 |
Horsepower Coverage
| Model |
|---|
| 30 HP |
| 40 HP |
| 45 HP |
| 50 HP |
| 55 HP |
| 60 HP |
| 65 HP |
| 75 HP |
| 80 HP |
| 90 HP |
| 100 HP |
| 115 HP |
| 125 HP |
| 150 HP |
| 175 HP |
| 200 HP |
| 225 HP |
| 250 HP |
| 300 HP |
Serial Number Ranges
| Model | Serial Range | Notes |
|---|---|---|
| 65 HP | 0P017000 - 0P325499 | |
| 75 HP | 0P017000 - 0P325499 | 3 cylinder |
| 75 HP | 0G760300 - 0T979999 | 3 cylinder |
| 80 HP | 0P017000 - 0P325499 | |
| 90 HP | 0G760300 - 0T979999 | 3 cylinder |
| 90 HP | 0P017000 - 0P325499 | 3 cylinder |
| 100 HP | 0G760300 - 0G965520 | 4 cylinder |
| 100 HP | 0P017000 - 0P058999 | 4 cylinder |
| 115 HP | 0G760300 - 0T979999 | 4 cylinder |
| 115 HP | 0P017000 - 0P325499 | 4 cylinder |
| 125 HP | 0G760300 - 0T979999 | 4 cylinder |
| 125 HP | 0P017000 - 0P325499 | 4 cylinder |
| 150 HP | 0G960500 - 0T408999 | |
| 175 HP | 0G960500 - 0T408999 | |
| 200 HP | 0G760300 - 0G960499 | |
| 200 HP | 0G960500 - 0T178499 | |
| 200 HP | 0G960500 - 0T408999 | |
| 200 HP | 0T178500 - 0T598999 | |
| 225 HP | 0G760300 - 0G960499 | |
| 225 HP | 0G760300 - 0T408999 | 3.0 L |
| 225 HP | 0G960500 - 0T178499 | |
| 225 HP | 0T178500 - 0T598999 | |
| 250 HP | 0G760300 - 0T408999 | |
| 300 HP | 0G610221 - 0T105297 | |
| 300 HP | 0T235084 - 0T429939 |
Broad prefix bands also covered: 0G760300 to 0T979999, 0P017000 to 0P325499, 0C222000 to 0D283221, 9589039 to 9793576. If the serial on the engine plate falls inside one of these bands the pump bolts straight on.
Compatible Engines
| Engine | HP | Years |
|---|---|---|
| Mercury 2-stroke outboard | 30 HP to 300 HP | 1986-1993 |
| Mariner 2-stroke outboard | 30 HP to 300 HP | 1986-1993 |
| 3 cylinder models | 65 HP, 75 HP, 80 HP, 90 HP | See serial table |
| 4 cylinder models | 100 HP, 115 HP, 125 HP | See serial table |
| V6 models | 150 HP, 175 HP, 200 HP, 225 HP, 250 HP | See serial table |
| Big block V6 | 225 HP 3.0 L, 300 HP | See serial table |
Fuel Pump Symptoms
| Symptom | What It Points To |
|---|---|
| Lean sneeze or cough at idle | Diaphragm stiff, low delivery |
| Primer bulb will not stay hard | Inlet check valve passing |
| Power falls away at planing speed | Pump cannot refill the float bowls |
| Fuel weeping at the diaphragm seam | Diaphragm split, stop using the engine |
| Engine floods when idling | Outlet valve not seating |
| Runs on the bulb alone | Pump not pumping, check the pulse line first |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Disconnect the battery and relieve fuel pressure into a rag |
| 2 | Note which outlet feeds which carburettor before removing the hoses |
| 3 | Undo the two body bolts and lift the pump clear |
| 4 | Transfer the pulse line fitting from the old pump |
| 5 | Check the pulse line for cracks and the inlet screen for debris |
| 6 | Fit the pump with the original gasket face clean, torque to 60-84 in-lb |
| 7 | Reconnect the outlets in the original order and prime the bulb |
| 8 | Run the engine and confirm 3-7 psi at idle with no seepage |
What's Included
| Component | Qty |
|---|---|
| Fuel pump assembly | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Shipping from United Kingdom
| Destination | Warehouse | Note |
|---|---|---|
| United Kingdom | United Kingdom local warehouse | Domestic delivery, no import duty |
| Ireland | United Kingdom local warehouse | Short transit, customs may apply |
| EU destinations | United Kingdom local warehouse | Customs cleared on arrival |
Before You Buy
- Read the serial number off the engine plate and check it against the ranges
- Confirm the motor is a 2-stroke built between 1986 and 1993
- Check the pulse line and the inlet screen before fitting a new pump
- Do not substitute a car fuel pump, this one runs on crankcase pulses
- This listing is the pump only, the hoses and the primer bulb are not included
- Replace the fuel filter at the same time, the old one is usually the cause
- 30-Day Easy Returns
- Ships from our United Kingdom local warehouse
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