SUZUKI 37400-40B00 Lh Switch 37400-40B02 138

( Manufacturer Part Number: 37400-40B00 ), ( Part Type: Switch )

Review SUZUKI 138 Lh Switch fits LT80 1991

The **Suzuki 37400-40B00 (and compatible variants 37400-40B02, 138, 1991 LT80/LH)** is a high-performance, precision-engineered ignition switch module designed exclusively for Suzuki four-wheel-drive vehicles from the early 1990s, including the legendary **LT80 and LH series** (such as the Suzuki Jimny, Sidekick, and other off-road models). This component serves as the critical interface between the driver s ignition key and the vehicle s electrical system, controlling power distribution to the starter motor, ignition coil, and various onboard electronics with unmatched reliability. Crafted from durable, corrosion-resistant materials and featuring a robust internal relay mechanism, the switch is engineered to withstand the demanding conditions of rugged off-roading, extreme temperatures, and prolonged exposure to moisture common challenges faced by adventurers and enthusiasts who rely on their Suzuki vehicles for both daily commutes and remote expeditions. The **37400-40B00** and its variants are particularly renowned for their seamless integration with the **1991 model year LT80/LH platforms**, ensuring compatibility with the vehicle s original wiring harness and control modules without the need for costly modifications. Whether deployed in a high-altitude desert, dense jungle, or icy tundra, this switch guarantees consistent performance, reducing the risk of electrical malfunctions that could leave drivers stranded. Its compact yet sturdy design allows for easy installation, even in tight engine bays, while its long service life minimizes the need for frequent replacements, making it a cost-effective solution for maintaining the operational integrity of classic Suzuki off-roaders. For owners seeking to preserve the authenticity and functionality of their vintage Suzuki, this ignition switch is an indispensable upgrade, blending reliability with the timeless spirit of adventure.

### Pros and Cons of Buying a Suzuki 37400-40B00 (37400-40B02) 138 (1991) LT80/LH Switch

1. **Reliability and Durability** Suzuki engines, particularly the LT80 series, are known for their robustness and longevity. The 138cc engine in these models is simple, well-built, and designed for heavy-duty use, making it suitable for long-term operation.

2. **Low Maintenance Costs** Compared to modern high-performance engines, Suzuki s older models require minimal maintenance. Parts are often inexpensive, and the mechanical simplicity reduces the risk of costly repairs.

3. **Proven Performance** The LT80 engine is a workhorse, capable of handling high loads, frequent starts, and extended runtime without excessive wear. It s a favorite in applications like generators, pressure washers, and marine use.

4. **Availability of Parts** As a classic Suzuki model, replacement parts (such as the 37400-40B00 carburetor, 37400-40B02 air filter housing, or 138cc engine components) are still widely available, especially through Suzuki dealerships, online marketplaces, or specialty suppliers.

5. **Fuel Efficiency** The 138cc engine is designed for efficiency, consuming less fuel than larger engines while still delivering adequate power for its intended use.

6. **Versatility** The LT80 series is used in various applications, including lawnmowers, pressure washers, and small generators. Its adaptability makes it a good choice for DIY projects or repurposing.

7. **Lower Initial Cost** Compared to newer engines, these older Suzuki models are often significantly cheaper to purchase, making them an attractive option for budget-conscious buyers.

8. **Proven Longevity** Many LT80 engines have lasted decades with proper care, making this a potentially long-term investment if maintained correctly.

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1. **Age and Wear** The 1991 model is over three decades old, meaning the engine may already show signs of wear, such as carbon buildup, worn piston rings, or a slightly less efficient carburetion system. A thorough inspection is essential before purchase.

2. **Potential for Hidden Damage** Older engines may have internal issues like cracked cylinder heads, worn crankshaft bearings, or fuel system problems that aren t immediately visible. A compression test or professional inspection is recommended.

3. **Emissions and Modern Regulations** If you plan to use this engine in applications subject to emissions standards (e.g., some generators or lawn equipment in certain regions), you may need to modify it or replace parts to comply, which can be costly.

4. **Limited Warranty or No Warranty** Most used Suzuki engines from this era come with no warranty. If something goes wrong shortly after purchase, you ll be responsible for repairs.

5. **Carburetion Challenges** The carburetor (e.g., 37400-40B00) may require tuning or cleaning to perform optimally, especially if the engine has been stored or used infrequently. Fuel quality can also affect performance.

6. **Rust and Corrosion** If the engine has been exposed to moisture or stored improperly, rust can damage critical components like the cylinder, piston, or crankcase. A thorough cleaning and inspection are necessary.

7. **Limited Aftermarket Support** While parts are available, finding specialized aftermarket upgrades (e.g., high-performance carburetors or modern fuel injection) may be difficult compared to newer engines.

8. **Fuel and Oil Requirements** Older engines often require specific fuel grades (e.g., two-stroke oil for 2-stroke models or proper oil viscosity for 4-stroke) to avoid damage. Using the wrong fuel or oil can lead to premature wear.

9. **Noise and Vibration** Suzuki s older engines can be louder and vibrate more than modern counterparts, which may be a concern if noise levels are a priority.

10. **Discontinued Support** Suzuki has phased out many parts for older models, meaning you may need to source components from third-party suppliers or salvage yards.

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The Suzuki 37400-40B00 (37400-40B02) 138cc LT80/LH switch engine is a **reliable, durable, and cost-effective choice** for applications where simplicity and longevity are valued. It excels in heavy-duty, low-maintenance roles like generators, pressure washers, or marine use, where modern engines may be overkill. However, its age introduces risks such as hidden wear, potential emissions issues, and the need for careful maintenance.

If you re purchasing this engine for a **specific project** (e.g., restoring a classic lawnmower or building a DIY generator) and are prepared for potential repairs or tuning, it can be a **great value**. On the other hand, if you prioritize **low maintenance, modern compliance, or noise reduction**, a newer engine may be a better long-term investment.

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1. **Buy Only After Inspection** Have a mechanic or Suzuki specialist perform a **compression test, leak-down test, and visual inspection** of the engine, carburetor, and fuel system. Look for signs of rust, carbon buildup, or worn components.

2. **Test Run** If possible, run the engine for at least 15 30 minutes to check for unusual noises, smoke, or performance issues.

3. **Consider a Rebuild or Replacement** If the engine shows significant wear (e.g., low compression, excessive oil consumption), weigh the cost of a **rebuild kit** against purchasing a used but well-maintained alternative.

4. **Check for Emissions Compliance** If using the engine in a regulated application, research whether modifications (e.g., catalytic converters, modern carburetors) are needed.

5. **Budget for Maintenance** Allocate funds for **oil changes, carburetor cleaning, and potential minor repairs** to ensure longevity.

6. **Buy from a Trusted Seller** Prefer dealers, auction houses with return policies, or private sellers with a history of honest transactions. Avoid "too good to be true" deals that may indicate hidden problems.

7. **Alternative Options** If the LT80 engine is too old or unreliable, consider newer Suzuki models (e.g., GX series) or other reliable brands like Honda or Briggs & Stratton, which offer better warranties and modern efficiency.

The Suzuki 37400-40B00 (1991 LT80) is a **solid choice for budget-conscious buyers who prioritize durability and simplicity**, provided it is thoroughly inspected and maintained. For those seeking **lower risk or modern compliance**, a newer engine may be preferable. If you proceed, ensure you re prepared for potential upkeep and don t hesitate to invest in a rebuild if necessary.

Details:

You get listing AS PICTURED. Thanks!, COMPATIBILITY: the following list if provided is all machines that share same part number as this item.

part #: 3740040b00 prices

• $34.99-$97.57

specifications electricacompone:

• for models: Lt80
• for makes: Suzuki
• for years: 1991
• mpn: 37400-40b00
• part type: Switch

offer electricacompone:

• availability: In Stock
• started: April 28, 2026
• sold: 0
• options: Ship-to-home
• quantity: 1
• best offers: True

shipping electricacompone:

• transit: 2-6 Days
• cost: $0.00
• class: Standard
• type: Fixed
• service: Standard

seller electricacompone:

• rating: 99.9%
• city: Hutchinson, Minnesota
• # reviews: 6729

returns electricacompone:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

general electricacompone:

• ATV, Side-by-Side UTV Parts Accessories > Electrical Ignition Components > Other Electrical Ignition Components
• condition: Used

payments electricacompone:

• credit card: Mastercard
• other
• wallet: Apple-pay

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