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SAM58

520H BELCHING SMOKE

By SAM58, in Engines

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SAM58    30

SAM58
Posted

Restored a 1992 520H, 60" deck with 1600 hours, sold to a freind and he has mowed about 2 acres with it for two seasons, now has 1700+ hours and still starts and runs like a new one.

Yesterday he started it up and moved it about 30 feet, then he said it blowed a big puff of blue smoke. Did the old girl just belch?

Still running great but the smoke scared him. could it be the crakcase vent stopping up??

Looking for advise....

IMG_0413.jpg

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MarkPalmer    80

MarkPalmer
Posted

Under "normal" circumstances its either overfilled with oil when this happens, or the breather could be getting blocked. With an Onan engine having that many hours, (high, but not abnormal) I would investigate by removing the heads and checking overall engine condition if it hasn't been done recently as it could be a blue puff of impending death.

-Mark-

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