jon f mn
Well-known Member
Seems I have no end to troubles with
engines. Today's issue is the 126 gas in
my 955 swather. Been having issues for a
while, it seems to get rich and eventually
flood out. Gets worse the longer it runs.
Been getting worse over 3 years time, but
it only gets maybe 10 hours a year of use.
Originally I thought since it gets worse
with use it could be the coil or
condenser, so both got replaced with a
complete tune up including copper wires,
cap, rotor and points. I got no change.
Took the carb off and found nothing wrong
there. I have good fuel flow and the
original mechanical pump works fine.
Bought a rebuilt carb and got no change.
Since it's running rich I tried shutting
off the fuel and letting it run dry
thinking that when it ran out it would
clear up just before it shut down, but it
just ran poor til it died. Switched out
the coil and condenser from my DC too
confirm they were good and got no change.
Put the coil and condenser from this
engine in the DC and it runs great. Put
another new cap, rotor and plugs in and
got no change. Battery shows 12.6v sitting
and 13.6v while running. Key switch was
replaced last year. I haven't done a
compression test yet, ordered a kit
today, but I don't think that's an issue.
This is a low hour engine and there is
little blowby. If it had gotten dusted
there should be a lot of blowby. I can see
the valves through the spark plug holes
and they look fine and are moving. This is
not a miss on a single cylinder or two
anyway. It runs but spits and sputters and
back fires out the exhaust when it loads
up.
I'm at my wits end here, where do I look
next?
engines. Today's issue is the 126 gas in
my 955 swather. Been having issues for a
while, it seems to get rich and eventually
flood out. Gets worse the longer it runs.
Been getting worse over 3 years time, but
it only gets maybe 10 hours a year of use.
Originally I thought since it gets worse
with use it could be the coil or
condenser, so both got replaced with a
complete tune up including copper wires,
cap, rotor and points. I got no change.
Took the carb off and found nothing wrong
there. I have good fuel flow and the
original mechanical pump works fine.
Bought a rebuilt carb and got no change.
Since it's running rich I tried shutting
off the fuel and letting it run dry
thinking that when it ran out it would
clear up just before it shut down, but it
just ran poor til it died. Switched out
the coil and condenser from my DC too
confirm they were good and got no change.
Put the coil and condenser from this
engine in the DC and it runs great. Put
another new cap, rotor and plugs in and
got no change. Battery shows 12.6v sitting
and 13.6v while running. Key switch was
replaced last year. I haven't done a
compression test yet, ordered a kit
today, but I don't think that's an issue.
This is a low hour engine and there is
little blowby. If it had gotten dusted
there should be a lot of blowby. I can see
the valves through the spark plug holes
and they look fine and are moving. This is
not a miss on a single cylinder or two
anyway. It runs but spits and sputters and
back fires out the exhaust when it loads
up.
I'm at my wits end here, where do I look
next?