Vanguard BIG BLOCK M540000, Repair Manual

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Check Crankcase Breather
Engine Does Not Start
1. Gently blow air into breather hose ( A , Figure 27)to verify
that there is no air flow through valve.
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2. Apply vacuum or draw air out through breather hose to
verify that air flows freely through valve.
3. If air flow has no resistance when blowing or is restricted
under vacuum, the crankcase breather is faulty.
See SECTION 7 – ASSEMBLE ENGINE, TOP END
ASSEMBLY, Crankcase Breather , for replacement
instructions.
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