Dolmar PM-411, Original Instruction Manual

13

cutting edge receives an equal amount of grinding to 
prevent an unbalanced blade. Improper blade balance will 
result in excessive vibration causing eventual damage to 
the engine and mower. Be sure to carefully balance blade 
after sharpening. The blade can be tested for balance by 
balancing it on a round shaft screwdriver. Remove metal 
from the heavy side until it balances evenly. 

(Fig. 26)

Before reassembling the blade and the blade adapter to 
the unit, lubricate the engine crankshaft and the inner 
surface of the blade adapter with light oil. Install the blade 
adapter on the crankshaft. Refer to 

Fig. 26

. Place the 

blade with the part number facing away from the adapter. 
Align the washer over the blade and insert the hex bolt. 
Tighten the hex bolt to the torque listed below.

11-3 BLADE MOUNTING TORQUE

Center Bolt must be tightened to 35 - 45 Nm torque. To 
insure safe operation of your unit. ALL nuts and bolts 
must be checked periodically for correct tightness. After 
prolonged use, especially in sandy soil conditions, the 
blade will become worn and lose some of the original 
shape. Cutting efficiency will be reduced and the blade 
should be replaced.
Replace with an approved factory replacement blade only. 
Possible damage resulting from blade unbalance 
condition is not the responsibility of the manufacturer.
When you change the blade, must use the original type 
marked on the blade (DOLMAR 263001433 for PM-411; 
DOLMAR 263001451 for PM-461) (for order the blade, 
contact your local dealer or call our company).

WARNING: 

Do not touch rotating blade.

11-4 ENGINE

Refer to the separate engine manual for engine 
maintenance instructions.
Maintain engine oil as instructed in the separate engine 
manual packed with your unit.
Read and follow instructions carefully.
Service air cleaner as per separate engine manual under 
normal conditions. Clean every few hours under 
extremely dusty conditions. Poor engine performance and 
flooding usually indicates that the air cleaner should be 
serviced.
To service the air cleaner, refer to the separate engine 
manual packed with your unit.
The spark plug should be cleaned and the gap reset once 
a season. Spark plug replacement is recommended at the 
start of each mowing season; check engine manual for 
correct plug type and gap specifications.
Clean the engine regularly with a cloth or brush. Keep the 
cooling system (blower housing area) clean to permit 
proper air circulation which is essential to engine 
performance and life. Be certain to remove all grass, dirt 
and combustible debris from muffler area.

12. STORAGE INSTRUCTIONS 

(OFF SEASON)

The following steps should be taken to prepare lawn 
mower for storage.
1. Following the final cut of the season allow the fuel tank 

to run dry.

2. Clean and lubricate mower thoroughly as described in 

the lubrication instructions.

3. Refer to engine manual for correct engine storage 

instructions.

4. Lightly coat mower’s cutting blade with chassis grease 

to prevent rusting.

5. Store mower in a dry, clean area.

NOTE:

When storing any type of power equipment in an 
unventilated or material storage shed;
- Care should be taken to rust-proof the equipment. 

Using a light oil or silicone, coat the equipment, 
especially cables and all moving parts.

- Be careful not to bend or kink cables.
- If the starter rope becomes disconnected from rope 

guide on handle, disconnect and ground the spark plug 
wire, depress the blade control handle and pull the 
starter rope out from engine slowly. Slip the starter 
rope into the rope guide bolt on handle.