Re: Glowing M

Posted by Bob M on August 17, 2006 at 09:19:20 from (151.190.254.108):

In Reply to: Glowing M posted by chadd on August 17, 2006 at 08:11:32:

Chad -

The red glowing manifold, fire out the stack, etc. is pretty much normal for these engines when worked really hard. However excessive heat and fire can also be from late ignition timing (timing set wrong or centrifugal advance not working), or the carb power screw adjusted too lean.

Bad timing can also cause roughness and popping out the exhaust at idle. Timing should be 0 deg (top dead center) mark on the fan pulley at low idle, then advancing to the 2nd mark (32 deg BTDC?) at high idle.

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You might also replace the spark plugs with a set 1 or 2 heat ranges colder – though colder plugs will be much more likely to foul if the tractor also run under light load/low RPM conditions.

Don’t bother switching to higher octane gas – it won’t significantly lower exhaust temperatures. Higher octane is required only if the engine pings/knocks under heavy load. Otherwise running high octane simply empties your wallet a little faster!

Replies:

• Re: Glowing M chadd 09:52:31 08/17/06 (0)
• Re: Glowing M the tractor vet 09:44:13 08/17/06 (2)
  • Re: Glowing M Bob M 10:35:36 08/17/06 (1)
    • Re: Glowing M Ron in Nebr 23:54:02 08/17/06 (0)

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