Briggs Exhaust on Lincoln Weldanpower

G6 at Snook, TX · Mar 4, 2014

It is cold today in Texas, 30*, and I started up the old welder/generator and I noticed the inner portion of the muffler turning red. Haven't noticed that before, but I can't say that I have really looked. It is a mid 1980s Lincoln Welder with the Briggs.

It is the exhaust muffler and the motor cranked and ran well. Is that red hot inner muffler anything to take note of or is it part of the deal?

Thanks.

[URL=http://s957.photobucket.com/us...s/ae52/nathan_giesenschlag/IMG_5346.jpg[/img][/url]

MarkWV · Mar 4, 2014

looks like my 225 weldnpower, single cylinder 16HP briggs, muffler gets hot, never saw it red or glowing, ?running to rich? my is ugly with a capital U, but still runs

G6 at Snook, TX · Mar 4, 2014

That is exactly the one. Loud, ugly, but runs well. Have to really have a good ground to strike the arc, but it does weld fairly well. A Bobcat or Ranger are easier to weld with. This machine is largely used as a generator first and welder second.

Bob · Mar 4, 2014

Hot exhaust is typically late timing or LEAN fuel mixture.

That being said what he is seeing is PROBABLY within the normal range.

Steve@Advance · Mar 4, 2014

Retarded timing can cause hot exhaust, don't think there is any adjustment other than point gap (if it has points).

It could be a mixture issue. I see you have an adjustable main jet, I would get it warmed up, put it under as heavy load as you can and lean it until it starts to run bad, then rich it so it runs good, then rich it just a tiny bit more.

Then with the load off, close the throttle and adjust the idle mix, same way.

A good test is to push the throttle closed, release it and see if it comes back up to speed without stumbling. A little black smoke is ok while it's coming up to speed.

old · Mar 4, 2014

Most likely that is it running way to lean which will burn the exhaust valve. Or the flywheel shear key is half broken which will advance the timing and cause it also but more likely to be running lean. Choke it some and I bet the muffler will cool down and not turn red

old · Mar 4, 2014

With out seeing the whole unit I would say I have one like it other then my unit has a 2 cylinder Onan engine on it and hand start so it gets used very little. That 2 cylinder is hard to pull over

Bob · Mar 4, 2014

Old, I was thinking you might be on to something with the half-sheared flywheel key 'til I realized that engine has points on the side of the block, operated by the camshaft that determine the actual ignition timing.

If the flywheel key were to shear and the flywheel got too far off from where it needs to be, eventually there's be NO spark, but timing wouldn't change.

old · Mar 4, 2014

If it has a mag timing will change a bit due to the magnets hitting of a bit or at least that is the way I would think it would be but I maybe wrong just a thought

G6 at Snook, TX · Mar 4, 2014

As for timing, I haven't fooled with it nor have I been in the motor. I bet it is too lean because I set the main jet when the temperature was about 70-75*. When I ran it it was about 30 in the garage.

On the way to work this morning I stopped by the local Briggs shop and they suggested the old muffler's spark arrester was clogged from age, usage, and dirt.

Dean · Mar 4, 2014

No.

The ignition timing will not change but eventually, the spark will fail.

Dean

Bob · Mar 4, 2014

Would be similar to a Kohler, changing point gap WOULD affect timing... if the OP's point gap is set really SMALL, timing would be LATE.

Bob M · Mar 4, 2014

I have an ancient Jacobson snow blower with that same engine (early 60's era Briggs model 23). Under load the baffle inside the muffler glows dull red. It's been doing this for 40+ years; it still runs strong.

As long as you are not seeing an actual flame out the exhaust and the engine picks up the load without stumbling (indicating a lean mixture...) I'd not be concerned.

old · Mar 4, 2014

Yep clogged exhaust or running lean or timing being off. As for timing when was the last time you set the points to the correct gap?? If it has been a long time the points maybe worn down which will change timing some

teddy52food · Mar 4, 2014

Spark happens when the points open.

T.R.K. · Mar 4, 2014

Just curious if you were running it in that building where you made the picture? Be careful of the exhaust fumes.

We had that same carburetor on an old cast-iron Briggs on a mower. the baffle in the muffler on it would have a visible glow in dim light-such as inside your building. Ran it that way for years.

old · Mar 4, 2014

Yes I know but my thinking is if the flywheel key of partly sheared it would throw off the mag and that in turn the spark

G6 at Snook, TX · Mar 8, 2014

Sorry I haven't replied lately, but I have been in California on business. Anyhow, the muffler also had a bit of a flash to it, like a dull spark when it was red.

I will put to the Kroil to it tonight to get the pipe to start loosening up to remove the muffler. Personally, I bet it is muffler and the carburetor in the cold was too lean. We'll see on Monday.

Briggs Exhaust on Lincoln Weldanpower

G6 at Snook, TX

Well-known Member

MarkWV

Member

G6 at Snook, TX

Well-known Member

Bob

Well-known Member

Steve@Advance

Well-known Member

old

Well-known Member

old

Well-known Member

Bob

Well-known Member

old

Well-known Member

G6 at Snook, TX

Well-known Member

Dean

Well-known Member

Bob

Well-known Member

Bob M

Well-known Member

old

Well-known Member

teddy52food

Well-known Member

T.R.K.

Well-known Member

old

Well-known Member

G6 at Snook, TX

Well-known Member

Similar threads