Table of Contents

2021 Yamaha SUPERJET Boats Maintenance Schedule

Introduction

Introducing the Maintenance Schedule for Yamaha SUPERJET Boats for 2021: Your manual for ensuring your high-performance watercraft operates at its best and lasts as long as possible. This extensive plan was painstakingly created by Yamaha to assist you in maintaining your SUPERJET boat in top condition all year long. Our maintenance program will help you keep your SUPERJET reliable, safe, and enjoyable whether you’re an experienced water enthusiast or a beginner to the world of personal watercraft. This manual equips you to traverse the seas with confidence, knowing that your Yamaha SUPERJET is well-cared for, from routine inspections to necessary servicing activities. Embark on a voyage of worry-free aquatic activities by diving into our user-friendly maintenance regimen.

Maintenance Schedule

Periodic checks and lubrication will keep your watercraft in the safest and most efficient condition possible. Therefore, make sure to carry out the periodic maintenance. Safety is an obligation of the watercraft owner. Proper maintenance must be carried out to keep the exhaust emission and sound levels within the regulated limits. The most important points of watercraft inspection and lubrication are explained on the following pages.
See a Yamaha dealer for genuine Yamaha re-placement parts and optional accessories designed for your watercraft.
Remember, failures that are the result of the installation of parts or accessories which are not qualitatively equivalent to genuine Yamaha parts are not covered by the limited warranty.
Maintenance, replacement, or repair of the emission control devices and system may be performed by any marine SI engine repair establishment or individual. Warranty repair, however, must be performed at an authorized Yamaha marine dealer-ship.

Warning
Be sure to turn off the engine when you perform maintenance unless otherwise specified. If you are not familiar with machine servicing, this work should be done by a Yamaha dealer or other qualified mechanic.
A service manual is available for purchase through a Yamaha dealer for owners who have the mechanical skills, tools, and other equipment necessary to perform maintenance not covered by this owner’s/operator’s
manual.

Adjusting the steering friction
The amount of friction in the steering can be adjusted to suit operator preference.

To adjust the steering friction

Lift the steering pole and support it with the lock pin.Steering pole Lock pin
Remove the plastic fasteners, and then remove the handlebar cover.
1. Plastic fastener
2. Handlebar cover
Turn the handlebars so that the left handlebar grip is facing down.
Loosen the locknut.
Tighten or loosen the adjusting nut until the desired amount of friction is obtained.
1. Adjusting nut
2. Locknut
While holding the adjusting nut with a wrench, tighten the locknut to the specified torque.
- Tightening torque
- Locknut
- 28 N·m (2.8 kgf·m, 21 lb·ft)
Securely install the handlebar cover and the plastic fasteners in their original positions.
While holding the steering pole, move the lock pin to the stowed position, and then lower the steering pole.
Adjusting the jet thrust nozzle angle The angle of the jet thrust nozzle can be adjusted to two settings to suit operator preference.

To adjust the jet thrust nozzle angle

Pull back the outer sleeve of the steering cable joint, and then disconnect the joint from the steering cable pivot bolt.
1. Steering cable joint
2. Remove the steering cable pivot bolt.
  1. Steering cable pivot bolt
  2. Steering column
3. Select the nozzle angle, install the steering cable pivot bolt in the desired position (P1 or P2) on the steering column, and then tighten the bolt to the specified torque.
  TIP
  The outermost hole in the steering column cannot be used.Nozzle angles
  1. Nozzle angles
  2. Steering cable pivot bolt positions
    Standard steering cable pivot bolt position:
    - P2 Tightening torque:
    - Steering cable pivot bolt:
    - 5 N·m (0.5 kgf·m, 3.7 lb·ft)
  3. Securely connect the steering cable joint to the steering cable pivot bolt.

Adjusting the handlebar position The handlebar can be adjusted to three positions to suit the rider’s preference. Have a Yamaha dealer adjust the position of the handlebar.

Periodic maintenance chart
The periodic maintenance chart gives general guidelines for periodic maintenance. Have a Yamaha dealer perform the checks in the following chart. However, maintenance may need to be performed more frequently depending on your operating conditions. If you have any questions, consult a Yamaha dealer.
This “√” mark indicates items to be checked and serviced by a Yamaha dealer.

Item	Operation	Initial	Thereafter every			Page
Item	Operation	10 hours	50 hours or 12 months *1	100 hours or 12 months *1	200 hours or 24 months *1	Page
Fuel line	Check fuel hoses and clamps			Ö		—
Fuel filler cap/Water separator	Check O-rings for cracks and deformation			Ö		—
Fuel tank	Check installation and straps			Ö		—
Water inlet strainer	Check for clogs and damage			Ö		—
Cooling water hoses	Check for damage and leakage, and check clamps			Ö		—
Engine oil	Replace	Ö	Ö			74
Oil filter	Replace			Ö		74
Spark plugs	Check	Ö		Ö		—
Battery	Check state of charge, terminals and bands			Ö		—
Battery leads	Check terminals			Ö		—
Steering master	Check and adjust	Ö		Ö		—
Steering cable	Check exterior and connections, and lubricate			Ö		—
Air intake hoses	Check for damage, and check clamps			Ö		—
Throttle body	Lubricate throttle valve			Ö		—
Exhaust system	Check for exhaust leak- age, and check hoses and clamps			Ö		—
Breather hose	Check breather hose and clamps			Ö		—
Impeller	Check for bends, dam- age, and foreign material			Ö		—
Jet thrust nozzle	Check movement, and lubricate			Ö		—

Item	Operation	Initial	Thereafter every			Page
Item	Operation	10 hours	50 hours or 12 months *1	100 hours or 12 months *1	200 hours or 24 months *1	Page
Handlebar pivot shaft	Check and adjust	Ö		Ö		—
Steering friction	Check and adjust	Ö		Ö		—
Throttle cable	Check and adjust	Ö		Ö		—
Jet vacuum bilge	Check hoses for clogs and damage, check clamps, and clean bilge strainer			Ö		—
Stern drain plugs	Check O-rings			Ö		—
Anode	Check for corrosion, and clean				Ö *2	—
Valve clearance	Check and adjust				Ö *2	—
Rubber coupling	Check for cracks, indentations, looseness, and noise				Ö	—
Engine mount	Check for damage and peeling				Ö	—
Nuts and bolts	Check	Ö		Ö		—

Whichever comes first.
Check every 200 hours.
Perform the pre-operation checks and post-operation checks before performing periodic maintenance.

FAQs

How often should I perform routine maintenance on my 2021 Yamaha SUPERJET?

Every 50 hours of operation or at least once per year, whichever comes first, Yamaha advises completing standard maintenance on your 2021 SUPERJET.

What kind of maintenance tasks should I perform at the 50-hour mark?

You should conduct duties like replacing the engine oil, oil filter, spark plugs, and fuel and water filters at the 50-hour mark.

How often should I inspect and replace the spark plugs?

After 100 hours of operation or once a year, whichever comes first, inspect and replace the spark plugs.

Is it necessary to check the fuel system? If so, how often?

Yes, it’s crucial to perform routine fuel system checks. Yamaha advises performing a fuel system inspection once a year or every 100 hours.

ow often should I clean and lubricate the throttle and steering cables?

Every 100 hours of use or once a year, the throttle and steering cables should be cleaned and lubricated.

What is the recommended maintenance schedule for the impeller and jet pump?

Yamaha advises replacing the impeller every 100 hours and cleaning and inspecting the jet pump and impeller every 50 hours or once a year.

When should I change the engine oil and oil filter?

Every 50 hours or once a year, whichever comes first, change the engine oil and oil filter.

How often should I replace the engine coolant?

Every two years or as needed, based on inspection, replace the engine coolant.

Is there a recommended interval for checking the battery?

Every 50 hours or once a year, Yamaha advises checking the electrolyte level and battery health.

How often should I inspect the hull and clean the exterior of the boat?

Depending on usage circumstances, inspect the hull and clean the exterior every 25 hours or as necessary.

Should I check the steering system regularly?

The steering system should be checked and lubricated either every 50 hours or once a year.

What is the maintenance schedule for the ignition system?

Every 100 hours of use or once a year, check the ignition system and replace any worn out parts.

How often should I replace the fuel/water separator filter?

Every 100 hours, or once a year, the fuel/water separator filter needs to be changed.

When should I inspect the hull for damage and signs of wear?

Every 25 hours or as needed, check the hull for damage and wear.

Is it important to follow the maintenance schedule even if the boat is used infrequently?

Yes, even if the boat isn’t used often, it’s important to keep up with the maintenance schedule because parts might degrade over time due to aging and environmental variables

Useful Links

View full PDF: 2021 Yamaha SUPERJET Boats| Auto User Guide

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