Multiquip b46s90 Engine oil, Spark Plug, Belt, Never use a spark plug of incorrect heat range

maintenance

NOTICE

Operating the engine with loose or damaged air cleaner components could allow unfiltered air into the engine causing premature wear and failure.

Engine oil

1.Drain the engine oil when the oil is warm as shown in Figure 43.

2.Remove the oil drain bolt and sealing washer and allow the oil to drain into a suitable container.

3.Replace engine oil with recommended type oil as listed in Table 4. For engine oil capacity, see Table 3 (engine specifications). DO NOT overfill.

4.Reinstall drain bolt with sealing washer and tighten securely.

Figure 43. Draining Engine Oil

Spark Plug

NOTICE

NEVER use a spark plug of incorrect heat range.

1.Remove and clean spark plug (Figure 44) with a wire brush if it is to be reused. Discard spark plug if the insulator is cracked or chipped.

2.Using a feeler gauge adjust spark plug gap to 0.028 ~0.031 inch (0.7~0.8 mm).

3.Thread spark plug into cylinder hole by hand to prevent cross-threading, then tighten securely.

GAP

.028 - .031 IN.

(0.7- 0.8 MM.)

Figure 44. Spark Plug Gap

V-belt

Visually examine the V-belt (Figure 45) and determine if it is full of tiny cracks, frayed, has pieces of rubber missing, is peeling or otherwise damaged.

Also, examine the belt and determine if it is oil soaked or "glazed " (hard shiny appearance on the sides of the belt). Either of these two conditions can cause the belt to run hot, which can weaken it and increase the danger of it breaking.

If the V-belt exhibits any of the above wear conditions replace the V-belt immediately.

OIL SOAKED

GLAZED CORD FAILURE

WORN BACK

COVER

BROKEN

MISSING RUBBER

CRACKS

SIDEWALL

WEAR

Figure 45. V-Belt Inspection

b46s90 WALK-BEHIND TROWEL • operatION And parts manual — rev. #0 (06/13/13) — page 31