Echo 73040 Owners Manual v.1 - Manual (Page 11)

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Maintenance is essential in preserving engine life. The engine
should be cleaned periodically to remove grass and buildup.
The engine owners manual addresses cleaning the air filter and
changing the oil. Service engine according to the mainte-
nance schedule in your engine owners manual.
IMPORTANT: Clean grass and buildup from the
engine periodically. Dusty conditions will require
frequent cleaning.
Engine Maintenance
1 . Shut off the engine. Disconnect the spark plug wire.
2 . Remove o-ring. Refer to Figure 14.
3 . Remove debris filter from filter base.
4 . Clean debris filter or replace if needed.
5 . Reinstall debris filter by performing above steps in reverse
order.
Debris Filter Cleaning/Replacement (Model 73050,
74050, 73350)
Inspect and clean engine cooling fins if needed.
Service & Maintenance-Cont.
Check the condition of the drive belt annually or after
30 hours of operation, whichever comes first. If the
belts are cracked, frayed, or worn, replace them by
following the steps below.
Belt Replacement Requirements: Belt Replacement Requirements: Belt Replacement Requirements: Belt Replacement Requirements: Belt Replacement Requirements:
• One (1) 1/2” wrench or one (1) 1/2” socket/ ratchet
1. Shut off the engine. Disconnect the spark plug wire.
2. Remove the front cover weldment (requires loosening and
removing three bolts).
3. Loosen the four bolts fastening the spindle hub to the trimmer
bottom frame. This will allow the spindle hub with the attached
trimmer pulley to move freely.
4. Remove the handle support channel (back cover with tabs to
adjust the handlebar). Requires loosening and removing four
bolts.
5. Remove worn or broken belt. If the belt is badly worn and will
not be used again, cut for ease in removal.
6. Install new belt from the front to the back. Feed belt above
the front trimmer pulley and below the rear pulley. On Model
73150, position belt on the outside of the center pulley.
7. Move the spindle hub by inserting a screwdriver in the slot on
the rear side of the spindle hub and applying 70 lbs. pressure
forward until belt is tight. Tighten bolts.
8. Replace front cover and secure with bolts.
9. Replace the handle support channel (back cover with handlebar
adjustment tabs). The bolts should be secured with the bolt head
beneath and the nuts and washer above the trimmer body.
Belt Replacement Steps:
Drive Belt Checking and Replacement
Model 73265, 73350, & 73455 Chain Adjustment
1. Loosen two (2) 5/16” nuts located under the trimmer
axle.
2. Slide the trimmer axle back to tighten the chains. Slide
the trimmer forward to loosen the chains.
3. Retighten 5/16” nuts.
Figure 14
O-Ring
Debris Filter
Debris Filter
Base
1 . Shut off the engine. Disconnect the spark plug wire.
2 . Remove outer, decorative, shroud from the engine.
3 . Clean the recoil cover.
4 . Attach adhesive velcro to the center of the recoil. Refer
to figure 15.
5 . Afix debris filter to the velcro. Position the filter so the
rope does not catch on the foam.
DO NOT REINSTALL OUTER COULING
Debris Filter Cleaning/Replacement (Model 73040)
Velcro Strip
Figure 15