Q: Which chain to use for my JONSERED CS 2238 chainsaw?

Your JONSERED CS 2238 chainsaw uses a Jonsered H36 type chain designed to provide an excellent balance between performance and kickback reduction. Here are all the important specifications: Chain specifications: Type: Jonsered H36 Pitch: 3/8" (9.52 mm) Drive link thickness: 1.3 mm (0.050") Number of drive links: 52, 56, or 62 depending on the guide length used Compatible guide lengths: 14, 16, or 18 inches (35, 40, or 45 cm) For sharpening the chain: use a round file of 4.5 mm (5/32") with a sharpening angle of 60° , a top plate angle of 30° , and a clearance of 0° . The depth limiter gap should be maintained at 0.65 mm (0.025"). It is recommended to adjust the chip thickness every three chain sharpenings. For safe and correct sharpening, use the recommended Jonsered sharpening template. Chain tension: check the tension after each full tank of gas. The chain should be tensioned to the maximum without preventing manual rotation. A new chain requires more frequent checks during its break-in period. Insufficient tension increases the risk of breakage and wear of the guide. Inspection and maintenance: when replacing or installing a chain, systematically check that the rivets and links have no cracks, that the chain is not stiff, and that the components show no abnormal wear. Replace the chain if its tooth height is less than 4 mm. Regularly oil your chain with a special chainsaw oil that has excellent fluidity and adhesion qualities, preferably the biodegradable vegetable oil recommended by Jonsered.

Question 1

Where is the choke on the JONSERED LM 2147 CMD lawn mower and how to use it at startup?

Accepted Answer

The choke of your JONSERED LM 2147 CMD lawn mower is integrated into the throttle lever number 13, located on the handlebar of the mower.

How to use the choke at startup:

Cold engine: position the throttle lever (13) to the START position to automatically activate the choke.
Hot engine: place the lever directly on MAX without using the choke.

Some LM 2147 CMD models may be equipped with a primer system instead of the traditional choke. In this case, you need to press the small enrichment pump (2) of the carburetor 3 to 4 times before setting the throttle lever to MAX.

Check your manual to identify which system is equipped on your mower. Once the choke is activated (or the primer is pressed), pull firmly on the starter handle (11) or use the ignition key (16) for electric starting.

Question 2

How to tighten or adjust the clutch on the JONSERED LM 2147 CMD lawn mower?

Accepted Answer

The PDF manual for this lawn mower does not contain detailed instructions for adjusting the clutch. However, here is what you need to know:

Available information on this lawn mower

The documentation mentions that the belt (depending on the version) is a wear part that needs to be replaced. The clutch of the JONSERED LM 2147 CMD generally operates via this drive belt.

What to do

Refer to your complete manual that was provided with the mower - it contains the precise procedures and tension values
Contact a dealer or JONSERED service if you need professional help to adjust the clutch
If the clutch is slipping or not functioning properly, a review by a qualified technician is recommended rather than a self-adjustment

The manual indicates that it is currently being transferred to the server - an enhanced version with these technical details should be available soon.

Question 3

What type of fuel to use for the JONSERED LM 2146 CMD?

Accepted Answer

The Jonsered LM 2146 CMD lawn mower is equipped with a 4-stroke gasoline engine. It requires standard unleaded gasoline, as mentioned in the user manual.

Required gasoline: Use quality unleaded gasoline with a minimum octane rating of 90 RON (87 AKI in American standards). The gasoline should be fresh and of good quality to ensure optimal engine performance.

Refueling tips:

Always fill the tank before starting the engine. Never remove the tank cap and never add gasoline while the engine is running or still hot.
Refuel only outdoors and do not add gasoline near a flame or spark source.
Do not store gasoline for more than 30 days. Always use fresh fuel.
Avoid fuels containing more than 10% ethanol (E10 or higher), which can damage the engine.

Safety: Never attempt to start the engine if you have spilled fuel. First, move the mower away from the spill area and wait for the vapors to dissipate before attempting to start. Always ensure the tank cap is securely closed after refueling.

Question 4

Which chain to use for my JONSERED CS 2238 chainsaw?

Accepted Answer

Your JONSERED CS 2238 chainsaw uses a Jonsered H36 type chain designed to provide an excellent balance between performance and kickback reduction. Here are all the important specifications:

Chain specifications:

Type: Jonsered H36
Pitch: 3/8" (9.52 mm)
Drive link thickness: 1.3 mm (0.050")
Number of drive links: 52, 56, or 62 depending on the guide length used
Compatible guide lengths: 14, 16, or 18 inches (35, 40, or 45 cm)

For sharpening the chain: use a round file of 4.5 mm (5/32") with a sharpening angle of 60°, a top plate angle of 30°, and a clearance of 0°. The depth limiter gap should be maintained at 0.65 mm (0.025"). It is recommended to adjust the chip thickness every three chain sharpenings. For safe and correct sharpening, use the recommended Jonsered sharpening template.

Chain tension: check the tension after each full tank of gas. The chain should be tensioned to the maximum without preventing manual rotation. A new chain requires more frequent checks during its break-in period. Insufficient tension increases the risk of breakage and wear of the guide.

Inspection and maintenance: when replacing or installing a chain, systematically check that the rivets and links have no cracks, that the chain is not stiff, and that the components show no abnormal wear. Replace the chain if its tooth height is less than 4 mm. Regularly oil your chain with a special chainsaw oil that has excellent fluidity and adhesion qualities, preferably the biodegradable vegetable oil recommended by Jonsered.

Question 5

How to remove the rivets on a JONSERED LM 2147 CMDAE lawn mower?

Accepted Answer

To remove the rivets on your JONSERED LM 2147 CMDAE self-propelled mower, start by completely stopping the engine and removing the spark plug, as indicated in the maintenance manual. Ensure that the machine is cool and wear safety glasses and gloves to avoid injury and flying metal debris.

The rivets on this model can be found on different parts: the cutting deck, the handle components, the side discharge deflector, or the chassis components. Precisely locate the rivets to be removed by consulting the assembly diagrams in your manual.

For removal, you will need the following tools: an electric drill with a bit slightly smaller than the diameter of the rivet, a screwdriver or a punch, and pliers. Start by gently drilling the center of the rivet head to weaken it, being careful not to damage the adjacent parts. Once the head is drilled, use the screwdriver or punch to remove it, then take out the remaining body of the rivet with the pliers.

After extracting the rivet, clean the area of all metal debris and drilling chips. If you need to replace the rivet, choose a rivet of the same diameter and length as the original to ensure a secure attachment for your JONSERED LM 2147 CMDAE. You can use a rivet gun to install a new blind replacement rivet.

Question 6

How to adjust the idle of the JONSERED CS 2238 chainsaw?

Accepted Answer

To adjust the idle of your JONSERED CS 2238 chainsaw, follow these precise steps:

1. Preparation

Make sure the chainsaw is turned off.
Disconnect the spark plug to prevent any accidental starting during handling.

2. Locating the adjustment screws

On this model, you will generally find two adjustment screws on the carburetor:

The H screw for maximum speed (high speed).
The L screw for idle (low speed).

The idle screw is often marked with an

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