The reverse lockdown spring on a 20 HP Johnson outboard motor is a crucial component ensuring your gear shift operates smoothly and securely. A malfunctioning spring can lead to gear slippage, difficulty shifting into reverse, or even complete reverse failure – a potentially dangerous situation on the water. This guide delves into understanding this spring, troubleshooting common issues, and safely replacing it.
What Does the Reverse Lockdown Spring Do?
The reverse lockdown spring's primary function is to hold the shift mechanism firmly in the reverse position. It creates the necessary tension to keep the gears engaged and prevent accidental shifting out of reverse. Without a functioning spring, the reverse gear might disengage under load, leaving you stranded or causing damage to the engine. This small but essential part plays a vital role in the overall safety and reliability of your outboard motor.
How to Troubleshoot a Faulty Reverse Lockdown Spring
Before replacing the spring, you need to confirm it's the culprit. Here are some common signs indicating a problem with your 20 HP Johnson's reverse lockdown spring:
- Difficulty Shifting into Reverse: The most obvious symptom is a struggle to engage reverse gear, requiring excessive force or multiple attempts.
- Reverse Gear Slipping: The engine might momentarily engage reverse but then slip out of gear under load, particularly when maneuvering at low speeds or under stress.
- Reverse Gear Pops Out: In severe cases, the reverse gear might disengage completely and unexpectedly.
- Unusual Noises During Shifting: Grinding or clicking sounds during shifting can also point towards a problem with the spring or other related components.
How to Replace a 20 HP Johnson Reverse Lockdown Spring
Replacing the reverse lockdown spring typically requires a moderate level of mechanical aptitude and familiarity with outboard motors. Always consult your owner's manual for specific instructions and diagrams relevant to your particular model year and engine configuration. The process generally involves:
- Disassembly: This step includes removing the shift linkage, accessing the lower unit, and carefully disassembling parts to reach the spring. Properly labeling components as you disassemble is crucial for reassembly.
- Spring Removal: Once accessed, the old spring can be removed. Be careful not to lose small parts or damage surrounding components.
- Spring Installation: Install the new spring, ensuring it's correctly positioned and seated in all its designated points. Follow your owner's manual diagrams meticulously for proper placement.
- Reassembly: Carefully reassemble all components in reverse order of disassembly, ensuring everything is properly aligned and secured.
- Testing: Once reassembled, test the reverse gear functionality thoroughly. Ensure smooth engagement and secure locking.
Note: Always use genuine OEM replacement parts for optimal performance and longevity. Using inferior or incorrect parts can lead to further damage or safety risks.
Where Can I Find a Replacement Reverse Lockdown Spring?
Genuine replacement parts are usually available from authorized Johnson/Evinrude dealers or reputable online retailers specializing in outboard motor parts. When ordering, always specify your outboard motor's model year and serial number to ensure compatibility.
What Other Parts Might Be Related to Reverse Gear Problems?
While the reverse lockdown spring is a frequent cause of reverse gear issues, other components can contribute to problems as well:
- Shift Cable: A worn or damaged shift cable can impede the smooth transfer of shifting commands to the lower unit.
- Shift Linkage: Worn or broken components in the shift linkage can also cause shifting problems.
- Shift Shaft: Problems within the shift shaft can affect the smooth operation of the reverse gear.
If replacing the spring doesn't resolve the reverse gear issues, further troubleshooting and potential repairs might be necessary. Consider consulting a qualified marine mechanic for diagnosis and repair if you lack the necessary expertise.
Can I do this myself?
This is a task best attempted by someone with mechanical experience and familiarity with outboard motors. Improper repair can lead to further damage or safety hazards. If you are unsure, it's always best to consult a qualified marine mechanic.
This detailed guide helps you understand, troubleshoot, and potentially repair your 20 HP Johnson's reverse lockdown spring. Remember, safety is paramount when working on any engine. If uncertain about any step, consult a qualified professional.
