Maxim Manufacturing MBWT5B - Manual (Page 5)

5
Adjustments and Maintenance
Starting the engine
1. Read engine owner's manual for complete starting instruction. Do not operate this trimmer without reading the engine
owner's manual.
2. Move the throttle control lever forward to the START or FAST position.
3. Push primer bulb firmly 3 times before starting engine. Note: Priming is usually unnecessary when restarting a warm
engine.
4. Grasp rope handle and pull slowly until resistance is felt. Then pull cord rapidly to overcome compression, prevent
kickback and start engine.
5. Operate engine in the fast throttle position.
Trimmer Line
1. Your trimmer loses trimming efficiency when the trimmer line is used beyond half of original length.
2. For best performance use a heavy gauge (.155" diameter) line.
3. Cut trimmer line to 23 inches.
4. Stop the engine. Wait for all moving parts to stop. Disconnect spark plug wire.
5. Remove worn trimmer line.
6. Thread trimmer line through to outside holes as shown in Figure 4.
7. Bring the two ends together and insert them (from the back) through the middle hole as shown in figure 5.
8. Tighten the trimmer line as shown in Figure 6.
9. Repeat for the other side.
Figure 4 Figure 5 Figure 6
Cut Height Adjustment
1. The cut height can be set at 1 7/8" and 3 3/4".
2. Stop the engine. Wait for all moving parts to stop. Disconnect the spark
plug wire.
3. Use the allen wrench found in the parts bag to loosen the set screw shown
in Figure 7.
4. Set the trimmer head at the desired height.
5. Tighten the set screw.
Lubrication of Jackshaft
1. Stop the engine. Wait for all moving parts to stop. Disconnect the spark
plug wire.
2. Use a grease gun with a good grade of automotive grease to lubricate the
jackshaft using the grease fitting (See Figure 7).
Drive Belt Adjustment
1. If the trimmer head does not turn effectively. The drive belt may have seated.
2. Stop the engine. Wait for all moving parts to stop. Disconnect the spark plug wire.
3. Observe distance between inside span of belts at the narrowest point. Span should measure 1 inch.
4. Loosen the bolts that hold the trimmer head and jackshaft to the trimmer under body (See Figure 7).
5. Move the assembly forward to tighten the belt or remove belt and replace if it is worn.
6. Tighten bolts.
7. Recheck the belt inside span.
Maintenance Schedule
1. Before each use: Check engine oil level, Check trimmer lines, Check trimmer head engagement, Clean engine,
engine bonnet and machine of excess grass and oil, Remove debris from guard, engine bonnet, and deck, and Check
nuts and bolts for appropriate tightness.
2. After every 25 hours: Check spark plug, Change engine oil, Change or clean air filter, lubricate jackshaft, and lubri-
cate wheel bearings.
Grease fitting Belt Adjustment Bolt
Set Screw
Figure 7