Trent Couch
Member
I?ve searched and read over other people having problems
with their M idling high and won?t go lower and I am stumped.
First off I kept having trouble getting the thing started it would
hit every so often and finally figured out that after 4 months
the gas went stale. Filled it full of fresh gas and it fired right up
but at a high idle. The throttle lever is all the way low and it
sounds as if the lever is all the way back. Let me also include
that this is on a brand new engine rebuild. New pistons
sleeves, crank turned, new lifters, new valves, head reworked,
450 camshaft the whole 9 yards. I also rebuilt the Governor
with new bushings, new needle bearings, new thrust bearing
and washer and also a new front bearing. I adjusted the
Governor per the manual and as was suggested by setting
?close? to what I thought the low idle on the carb should be
then adjusting the lever on the threaded rod so the pin slides
in freely at max throttle and it also slides freely at low throttle. I
have the Governor low idle stop bolt set and even backed it
up a few turns more and still no lower idle. The max is set just
against the stop in correlation to the max throttle position. I
have double checked my governor throttle tube to carb
connection and the little tang from the Governor is inside the
middle of the fork on the carb connection for the throttle plate.
I even pulled off the bowl and verified the opening and closing
of the throttle plate. The Governor spring is also loose when
the throttle is all the way down with no tension on it. I have
checked my timing thinking it may be timed to be ?putting a
load? on the engine. I turned the engine to TDC on the
compression stroke for #1 cylinder and then opened up
distributor and tuned it so the points just began to open with a
timing light and locked it down there. The pointer is pointing
toward #1 spark plug and is cranking up fine now. I noticed
that when I cranked the engine gas was coming out the
bottom of the carb when it was not firing. It does not however
leak just when sitting and fuel turned on. I tried adjusting the
carb I got the idle screw turned all the way out and played with
the high idle some but would a carb problem cause the issue
I?m having cause I?m scratching my head. Sorry to ramble on I
just want to describe this as clearly as possible. Any tips tricks
or all suggestions wanted it just seems really odd.
with their M idling high and won?t go lower and I am stumped.
First off I kept having trouble getting the thing started it would
hit every so often and finally figured out that after 4 months
the gas went stale. Filled it full of fresh gas and it fired right up
but at a high idle. The throttle lever is all the way low and it
sounds as if the lever is all the way back. Let me also include
that this is on a brand new engine rebuild. New pistons
sleeves, crank turned, new lifters, new valves, head reworked,
450 camshaft the whole 9 yards. I also rebuilt the Governor
with new bushings, new needle bearings, new thrust bearing
and washer and also a new front bearing. I adjusted the
Governor per the manual and as was suggested by setting
?close? to what I thought the low idle on the carb should be
then adjusting the lever on the threaded rod so the pin slides
in freely at max throttle and it also slides freely at low throttle. I
have the Governor low idle stop bolt set and even backed it
up a few turns more and still no lower idle. The max is set just
against the stop in correlation to the max throttle position. I
have double checked my governor throttle tube to carb
connection and the little tang from the Governor is inside the
middle of the fork on the carb connection for the throttle plate.
I even pulled off the bowl and verified the opening and closing
of the throttle plate. The Governor spring is also loose when
the throttle is all the way down with no tension on it. I have
checked my timing thinking it may be timed to be ?putting a
load? on the engine. I turned the engine to TDC on the
compression stroke for #1 cylinder and then opened up
distributor and tuned it so the points just began to open with a
timing light and locked it down there. The pointer is pointing
toward #1 spark plug and is cranking up fine now. I noticed
that when I cranked the engine gas was coming out the
bottom of the carb when it was not firing. It does not however
leak just when sitting and fuel turned on. I tried adjusting the
carb I got the idle screw turned all the way out and played with
the high idle some but would a carb problem cause the issue
I?m having cause I?m scratching my head. Sorry to ramble on I
just want to describe this as clearly as possible. Any tips tricks
or all suggestions wanted it just seems really odd.