PAGE 38 — J36/B46-M30 SERIES WALK-BEHIND TROWELS • OPERATION MANUAL — REV. #1 (11/17/17)
Figure 51. Air Cleaner Maintenance
(Robin-Subaru)
Engine Oil
Refer to Figure 52.
Figure 52. Draining Engine Oil
1. Remove the drain bolt and sealing washer, and allow
the oil to drain into a suitable container.
2. Replace the engine oil with the recommended oil type
listed in Table 8. For engine oil capacity, see Table 3
or Table 4.
DO NOT overfill.
BLOW COMPRESSED
AIR FROM THE
INSIDE OUT
NOTICE
Operating the engine with loose or damaged air cleaner
components can allow unfiltered air into the engine,
causing premature wear and failure.
NOTICE
ALWAYS drain the engine oil while the oil is warm.
DRAIN
BOLT
SEALING
WASHER
OIL FILLER
DIPSTICK
MAINTENANCE
3. Reinstall the drain bolt with sealing washer and tighten
securely.
Spark Plug
1. Remove the spark plug (Figure 53) and clean it with a
wire brush if it is to be reused. Replace the spark plug
if the insulator is cracked or chipped.
Figure 53. Spark Plug
2. Using a feeler gauge, adjust the spark plug gap
(Figure 53). If your trowel has a
Honda engine, the
gap should measure 0.028–0.031 inch (0.7–0.8 mm).
If your trowel has a
Robin-Subaru engine, the gap
should measure 0.024–0.028 inch (0.6–0.7 mm).
3. To prevent cross-threading, thread the spark plug into
the cylinder hole by hand, then tighten securely.
V-Belt
1. Inspect the V-belt (Figure 54) to determine if it is frayed,
peeling, full of tiny cracks, has pieces of rubber missing,
or is otherwise damaged.
Figure 54. V-Belt Inspection
GAP (HONDA)
:
0.028 – 0.031 in.
(0.7 – 0.8 mm)
GAP (ROBIN-SUBARU)
:
0.024 – 0.028 in.
(0.6 – 0.7 mm)
GLAZED
OIL-SOAKED
BROKEN
CORD FAILURE
CRACKS
MISSING
RUBBER
SIDEWALL
WEAR
WORN BACK
COVER