40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00

Product Details
Customization: Available
After-sales Service: Yes
Warranty: 1 Year
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  • 40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
  • 40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
  • 40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
  • 40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
  • 40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
  • 40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
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  • Overview
  • Detailed Photos
  • Installation Instructions
  • Product Description
  • Company Profile
Overview

Basic Info.

Model NO.
647-14342-42-00
Application
Boat, Yacht
Standard
ISO
Customized
Non-Customized
Surface Treatment
Polished
Material
Brass
Type
Pilot Jet
Cylinders
2
Fuel Type
Gasoline
Engine
2 Stroke
Engine Position
Outboard
Engine Capacity
1-2L
Unit Assy
Carburetor
Engine Power
40HP
Applicable Brand
YAMAHA
Condition
New
Transport Package
Box
Trademark
YALUME MARINE
Origin
China, Japan, Taiwan
HS Code
8409911100
Production Capacity
20000

Product Description

40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-0040HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00

 
Detailed Photos

40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-0040HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00

40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-0040HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
Installation Instructions

 

40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00
Product Description

647-14342-42-00
Jet, Pilot (# 84), Yamaha,
For Outboard: Yamaha 40

Features:
1. Precision Fuel Control at Low Speeds: The pilot jet is specifically designed for precision, providing just the right amount of fuel at low RPMs to ensure smooth idling and low-speed operation.
2. Durable Construction: Made from corrosion-resistant materials, the pilot jet can endure prolonged exposure to fuel without deteriorating, ensuring long-lasting functionality.
3. Compact, Efficient Design: The pilot jet's simple, compact design allows it to precisely control fuel flow within the small, low-speed circuits of the carburetor without affecting mid- or high-speed performance.
4. Calibrated Orifice for Fuel Delivery: The pilot jet is precisely sized to provide the exact fuel flow needed for idle and low-speed operation, avoiding excessive fuel consumption.

Functions:
1. Fuel Delivery at Idle and Low Speeds: The pilot jet regulates the small amount of fuel needed when the engine is idling or operating at low RPMs, maintaining an optimal fuel-air mixture.
2. Transitioning from Idle to Acceleration: When transitioning from idle to low-speed acceleration, the pilot jet works in tandem with the throttle to prevent fuel delivery gaps, ensuring a smooth shift.
3. Preventing Stalling and Hesitation: By delivering a consistent fuel supply at idle, the pilot jet helps avoid issues like stalling, hesitation, or rough idling, which can lead to performance problems.

Maintenance Tips:
1. Regular Cleaning: Over time, residue from fuel can build up in the jet orifice, affecting fuel flow. Regularly clean the pilot jet with a carburetor cleaner or compressed air to ensure it stays clear of debris.
2. Check for Clogging: Since the pilot jet has a small orifice, it can easily clog with residue. During maintenance, inspect for clogs and remove any blockages to restore fuel flow.
3. Use High-Quality Fuel: Use clean, high-quality fuel to minimize contaminants that could clog the pilot jet, especially if you frequently operate at low speeds.
4. Avoid Ethanol-Heavy Fuels: Ethanol-blended fuels can leave deposits in the fuel system, which may clog the pilot jet over time. If ethanol-free fuel is unavailable, consider adding a fuel stabilizer to reduce deposit formation.
5. Inspect During Seasonal Maintenance: When preparing the motor for seasonal storage, inspect and clean the pilot jet to prevent fuel deposits. Adding a fuel stabilizer can further help maintain jet cleanliness during extended storage.

Common Signs of Jet Pilot:
1. Clogging: Due to the small orifice size, the pilot jet can easily become clogged by fuel residues, dust, or particles. Clogging leads to poor idle quality, engine hesitation, and potential stalling at low speeds.
2. Corrosion: Though resistant to corrosion, long-term exposure to fuel or ethanol can cause corrosion in the jet, impacting its ability to provide precise fuel flow. Corrosion may create irregular fuel delivery at idle.
3. Wear from Abrasive Particles: Particles in fuel can gradually wear down the pilot jet's orifice, reducing its precision and leading to inefficiencies in low-speed fuel delivery.
4. Leaning Out or Rich Idle: A worn or damaged pilot jet may cause a lean or rich condition at idle. Signs include rough idling, hard starting, excessive fuel consumption, or an inconsistent idle.

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Company Profile

40HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-0040HP Yamaha Marine Engine OEM Hardware Parts: Jet, Pilot (#84) 647-14342-42-00

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