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Operator's and Safety Manual
for Gasoline Chain Saws
Read and understand this Manual. Always follow safety precautions in the Operator's and Safety Manual.
The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth
FUELS WITH MORE THAN 10% ETHANOL ARE NOT APPROVED FOR USE IN MARUYAMA 2-STROKE ENGINES!
Use of alternative fuels, such as E-20 (20% ethanol), E-85 (85% ethanol) or any fuels not meeting MARUYAMA
requirements are not approved for use in MARUYAMA 2-stroke gasoline engines!
Poor engine performance, loss of power, overheating, fuel vapor lock, improper clutch engagement, premature
deterioration of fuel lines, premature deterioration of gaskets, premature deterioration of carburetors.
USING ALTERNATIVE FUELS AND/OR 2-STROKE OILS NOT ACCORDING TO JASO FD OR ISO-L-EGD IN
1
Improper use can cause serious injury!
defects or other reproductive harm. Preserve this Manual carefully!
USE OF ALTERNATIVE FUELS CAN CAUSE THE FOLLOWING PROBLEMS:
MARUYAMA 2-STROKE ENGINES WILL VOID YOUR ENGINE WARRANTY!
WARNING!
WARNING!
MCV42
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Related Manuals for Maruyama MCV42
Summary of Contents for Maruyama MCV42
- Page 1 FUELS WITH MORE THAN 10% ETHANOL ARE NOT APPROVED FOR USE IN MARUYAMA 2-STROKE ENGINES! Use of alternative fuels, such as E-20 (20% ethanol), E-85 (85% ethanol) or any fuels not meeting MARUYAMA requirements are not approved for use in MARUYAMA 2-stroke gasoline engines!
- Page 2 MARUYAMA recommends that you retain all receipts covering maintenance on your small off-road engine but MARUYAMA cannot deny warranty solely for the lack of receipts or for your failure to ensure the perfor- mance of all scheduled maintenance.
- Page 3 (10) Add-on or modified parts that are not exempted by the Air Resources Board may not be used. The use of any non-exempted add-on or modified parts by the ultimate purchaser will be grounds for disallowing a warranty claim. MARUYAMA will not be liable to warrant failures of warranted parts caused by the use of a non-exempted add-on or modified part.
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Page 4: Table Of Contents
Fuel / Refuelling..........28-29 Extract from the spare parts list ......45-46 The MCV42 will be delivered in a protective cardboard box to prevent transport damage. Cardboard is a basic raw material and is consequently reuseable or suitable for recycling (waste paper recycling). -
Page 5: Delivery Inventory
Delivery inventory 1 Chain saw 2 Guide bar 3 Saw chain 4 Chain protection cover 5 Universal wrench 6 Wrench 7 Screw driver for carburetor adjustment In case one of the parts listed should not be included in the delivery inventory, please consult your sales agent. 8 Operator’s and Safety Manual (not shown) Symbols You will notice the following symbols on the chain saw and in the Operator’s and Safety Manual:... -
Page 6: Safety Precautions
Do not let the tions, should be performed by MARUYAMA. (For example, if improper tools are used to remove the nose of the guide bar contact the log, branch,... - Page 7 Have your MARUYAMA dealer show you how to Always use two hands when operate your chain saw. Observe all applicable operating the chain saw! local safety regulations, standards and ordinances.
- Page 8 Never modify a chain saw in any way. Only at- tachments supplied by MARUYAMA or expressly Protect your hands with gloves when handling saw and approved by MARUYAMA for use with the specific saw chain. Heavy-duty, nonslip gloves improve your saw are authorized.
- Page 9 "Mounting Guide Bar and Chain" of this manual. tion. If fuel or oil leakage is found, do not start or run MARUYAMA chain, guide bar and sprocket must match the engine until leak is fixed and spilled fuel has been each other (see the appropriate section in this manual).
- Page 10 Always start a cut with the chain running at full speed the appropriate section of this manual. and the spike bar in contact with the wood. Have your MARUYAMA dealer check your saw and make proper adjustments or repairs. WARNING! Check the saw chain tension frequently, especially Never use the saw with one hand.
- Page 11 In order to keep control of your saw, always maintain a firm foothold. Never work on a ladder, in a tree or on any other insecure support. Never use the saw above shoulder height (fig. 9). Kickback: Position the chain saw in such a way that your body is clear of the cutting attachment whenever the engine Kickback occurs when the upper quadrant of the bar is running (fig.
- Page 12 Devices for reducing the risk of kickback injury 4. Don’t overreach. MARUYAMA have developed a special chain brake to 5. Don’t cut above shoulder height. reduce the risk of kickbacks. 6. Begin cutting and continue at full throttle.
- Page 13 Pushback: To avoid pull-in Pushback occurs when the chain on the top of the 1. Always start a cut with the chain rotating at full speed bar is suddenly stopped when it is pinched, caught and the spike bar in contact with the wood. or encounters a foreign object in the wood.
- Page 14 45° First cut 45° Second cut = cutting down area When felling, maintain a distance of at least 2 1/2 tree If the tree has large buttress roots, cut into the largest lengths from the nearest person (see fig. 17). buttresses vertically first (horizontally next) and re move (fig.
- Page 15 Plunge-Cut Method Begin the felling cut slighty higher than the felling notch and on the opposite side of the tree (fig. 22). Then cut Timber having a diameter more than twice the length horizontally through towards the felling notch. Apply of the guide bar reauires the use of the plunge-cut the chain saw with its spikes directly behind the uncut method before making the felling cut.
- Page 16 Bucking Bucking is cutting a log into sections. WARNING! There is an extreme danger of kickback at this point. Extra caution must be taken to maintain control of the saw. To make the felling cut, follow WARNING! the sectioning method described previously (fig. 1.
- Page 17 2. Cross cut any maintenance or repair work not described in this manual. Have such work performed by your Tension side MARUYAMA service shop only. Pressure side 1. Relieving cut Maintaining and storing the saw Keep the chain, bar and sprocket clean and lubricated;...
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Page 18: Denomination Of Components
Denomination of components Identification plate Serial no. Year of manufacture Indicate when ordering spare parts! 1 Handle 15 Starter grip 2 Cover 16 Combination switch (Choke / Start / Stop) 3 Hood lock 17 Fuel pump (Primer) 18 Throttle lever 4 Tubular handle 19 Safety locking button 5 Hand guard (release for chain brake) -
Page 19: Technical Data
16,2 Chain oil tank capacity floz Mixture ratio (fuel/two-stroke oil) - when using MARUYAMA High Performance oil 50 : 1 - when using other synthetic oils (oil quality must be JASO FD or ISO-L-EGD) 50 : 1 Chain brake... -
Page 20: Only For Models With Fastening Nuts On The Sprocket Guard
PUTTING INTO OPERATION Only for models with fastening nuts on the sprocket guard STOP CAUTION: Before doing any work on the guide bar or chain, always switch off the engine and pull the plug cap off the spark plug (see "Replacing the spark plug"). Always wear protec- tive gloves! CAUTION: Start the chain saw only after having assembled it com-... -
Page 21: Tightening The Saw Chain
Lift the chain (9) over the sprocket (8). CAUTION: Do not insert the chain between the chain sprocket and the disc. Guide the chain from above about halfway into the groove (10) on the guide bar. CAUTION: Note that the cutting edges along the top of the chain must point in the direction of the arrow! Pull the chain (9) around the sprocket nose (11) of the guide bar in the direction of the arrow. -
Page 22: Checking The Chain Tension
Checking the chain tension STOP The tension of the chain is correct if the chain rests against the bottom side of the guide bar and can still be easily turned by hand. While doing so the chain brake must be released. Check the chain tension frequently - new chains tend to get longer during use! When checking the chain tension the engine must be switched... -
Page 23: Mounting The Guide Bar And Saw Chain
Only for the QuickSet guide bar CAUTION: STOP Before doing any work on the guide bar or chain, always switch off the engine and pull the plug cap off the spark plug (see "Replacing the spark plug"). Always wear protec- tive gloves! CAUTION: Start the chain saw only after having assembled it com-... -
Page 24: Tensioning The Saw Chain
Pull the chain (6) around the sprocket nose (8) of the guide bar in the direction of the arrow. Replace the sprocket guard (3). IMPORTANT: Lift the saw chain over the chain catcher (9). Tighten the nuts (2) only hand-tight to begin with. Tensioning the saw chain Turn the QuickSet chain tensioner (10) to the right (clockwise) using the combination tool, until the saw chain guide elements... -
Page 25: Mounting The Guide Bar And Saw Chain
Only for models with quick tensioner on sprocket guard CAUTION: Before doing any work on the guide bar or chain, always STOP switch off the engine and pull the plug cap off the spark plug (see "Replacing the spark plug"). Always wear protec- tive gloves! CAUTION: Start the chain saw only after having assembled it com-... -
Page 26: Tightening The Saw Chain
Pull the chain (8) around the sprocket nose (10) of the guide bar in the direction of the arrow. Line up the holes in the sprocket guard (4) with the pins (11). Turn the chain tensioning screw (B/3) to get the chain tension- ing pin (12) aligned with the hole in the guide bar. -
Page 27: Checking The Chain Tension
Tension the chain as already described. Chain brake The MCV42 comes with an inertia chain brake as standard equipment. If kickback occurs due to contact of the guide-bar tip with wood (see SAFETY PRECAUTIONS, page 11,12), the chain brake will stop the chain through inertia if the kickback is sufficiently strong. -
Page 28: Fuel / Refuelling
841252 which will be consumed over the next few months. At high In case MARUYAMA premium quality two-stroke engine oil is not temperatures, once fuel has been mixed it should be used available, it is recommended to use a mixture ratio of 50:1 with up in 6-8 weeks. - Page 29 Important note on bio-degradable chain oils If you are not planning to use the saw again for an ex- In case of damage caused by using waste oil or unappropriate tended period of time, empty the oil tank and put in a chain oil the product guarantee will be null and void.
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Page 30: Chain Lubrication
Checking the chain lubrication Never work with the chain saw withoute sufficient chain lubri - ca tion. Otherwise the service life of the chain and guide bar will be reduced. Before starting work check the oil level in the tank and the oil feed. Check the oil feed rate as described below: Start the chain saw (see "Starting the engine"). -
Page 31: Starting The Engine
Starting the engine Do not start the chain saw until after it is completely as- sembled and checked! Move at least 3 meters / 10 feet away from the place where the chain saw was fuelled. Make sure you have a secure footing, and place the saw on the ground in such a way that the guide bar and chain are not near anything. -
Page 32: Checking The Chain Brake
Bring the engine back to idle and release the chain brake. Caution: If the chain does not stop immediately in this test, turn off the engine immediately. Do NOT use the chain saw in this condition! Contact a MARUYAMA service center. STOP visible - Normal operation... -
Page 33: Adjusting The Carburetor
Turn adjusting screw (S) clockwise (screw in): Idle speed increases. Important: If the saw chain still moves during idle even after you have adjusted the idle speed, do NOT use the saw. Take it to a MARUYAMA service center! -
Page 34: Sharpening The Saw Chain
MAINTENANCE Sharpening the saw chain STOP CAUTION: Before doing any work on the guide bar or chain, always switch off the engine and pull the plug cap off the spark plug (see "Replacing the spark plug"). Always wear protective gloves! The chain needs sharpening when: The sawdust produced when sawing damp wood looks like wood flour. - Page 35 Files and how to work with them Use a special saw chain round file for sharpening. Standard round files are unsuitable. For the order number, see “Accessories”. Type 484: File the first cutter half with a 3/16” (4,8 mm) dia. round saw-chain file, then switch to a 11/64”...
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Page 36: Cleaning The Brake Band And Sprocket Interior
The chain brake is a very important safety device and like any other component subject to normal wear and tear. Regular inspection and maintenance are important for your own safety and must be done by a MARUYAMA service center. SERVICE Cleaning the guide bar CAUTION: Protective gloves must be worn. -
Page 37: Replacing The Saw Chain
Replacing the saw chain CAUTION: Use only chains and guide bars designed for this saw (see the Extract from the spare-parts list)! When changing the type of chain, the complete clutch drum (12) must be changed to fit the different chain. If neces- sary, replace it. -
Page 38: Cleaning The Air Filter
Cleaning the air filter CAUTION: To prevent eye injury, always wear eye protection when cleaning the filter with compressed air! Do not use fuel to clean the air filter. Unscrew the hood lock (1) counter-clockwise and remove the hood (2). Push up the combination switch (3) (Choke position) to prevent dirt particles from falling into the carburetor. -
Page 39: Replacing The Spark Plug
STOP Unscrew 3 screws (11) and remove the upper half of the muf- fler (12). Note: For saw model MCV42, remove the converter along with the upper muffler half. The screws on the bottom muffler half (13) are now accessible, and it is possible to check them for tightness. -
Page 40: Replacing The Starter Cable
Replacing the starter cable/ Replacing the return spring pack/Replacing the starter spring Unscrew four screws (1). Remove fan housing (2). Remove the air guide (3) from the fan housing. CAREFUL! Injury hazard! Do not unscrew screw (7) if the return spring is under tension. If the starter cable is to be replaced although it is not broken, it will be necessary to first de-tension the cable drum return spring (13). -
Page 41: Cleaning The Cylinder Area
Cleaning the air filter compartment / fan com- partment Remove cover. Remove the fan housing. CAUTION: To prevent eye injury, always wear eye protection when cleaning the filter with compressed air! The entire area (15) can now be brushed clean or cleaned with compressed air. -
Page 42: Instructions For Daily And Periodic Maintenance
The user of the chain saw must not perform maintenance work which is not described in the operator’s manual. All such work must be carried out by a MARUYAMA service center. Page General Chain saw Clean exterior, check for damage. -
Page 43: Service, Spare Parts And Guarantee
Please bear in mind that if parts other than original MARUYAMA spare parts are used, this will automatically invalidate the MARUYAMA product guarantee. -
Page 44: Troubleshooting
Trouble shooting Malfunction System Observation Cause Chain does not run Chain brake Engine runs Chain brake actuated. Engine does not start or Ignition system Ignition spark Malfunction in fuel supply system, com- only with difficulty pression system, mechanical malfunction. No ignition spark STOP switch in position, fault or short-circuit in the wiring, Spark plug cap or spark plug defective... -
Page 45: Extract From The Spare Parts List
Extract from the spare parts list MCV42 Use only original MARUYAMA parts. For repairs and replacement of other parts, see your MARUYAMA service center. 31/32... - Page 46 Extract from the spare parts list MCV42 Use only original MARUYAMA parts. For repairs and replacement of other parts, see your MARUYAMA service center. Accessories (not delivered with the chain saw) Pos. Qty. Description Chain gauge Sprocket nose bar 3/8”, 12” (30 cm) File handle Sprocket nose bar 3/8”, 14”...
- Page 47 Notes MCV42...
- Page 48 MARUYAMA U.S., INC. 4770 Mercantile Dr. Suite 100 Fort Worth, TX 76137 www.maruyama.com...
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