Air leaks at the carb gasket are often worse at idle than at high speed because of more vacuum at idle . When it's surging push the top of the carb side ways and if there is a gasket leak the engine may die . A least it would on my 1959 ford PU and also on a new 1964 that another guy was the...
if its the spring i;m thinking of that spring works in conjunction with the governor to control engine spreed . with the engine dead the spring should have the throttle plate fully open .
On your starter remove the + red cable we see and screw the nut back on . Connect a jumper cable from the battery + to that terminal on the starter . Now connect the - jumper cable to the battery and the other end touch a starter mounting bolt .
If there;s a bad bearing that bearing assembly be a warmer temperature than one with good bearings . Kill it and feel them after it runs awhile and the noise starts .
I don' have a specific answer but if you still have the old blades reinstall those . If the noise stops we can be reasonable sure the noise has something to do with the new blades
2 C clamps make connecting and disconnecting this battery takes less than 30 seconds .
They also make good handles to transport a battery when standing vertical .
If you don't have the skill to do this please don't .
===========================================================
Won;t crank and won't start are 2 completely different problems .
I said " if it will crank and start " continue
If it will crank and start the engine don't do anything but maybe clean the terminals and cable ends with sandpaper until at least 1 area shines as new metal . Your mower will take care of any decline in volts , it's made to do that . If it is one that takes water check that and if low add...
From what i'm seeing on the spark plug you may want to consider taking a look at the spark arrestor screen . It could need cleaning .
There's videos on the procedure .
RPM can be calculated with : RPM x drive pulley Diameter divided by the driven pulley diameter .
Measure the dia. of the 2 drive pulleys pulleys and calculate the RPM difference of the driven .
This isn't the answer to your question but i suspect someone will ask for the answer of the driven...
"The mower seems like it might have a mild, almost unnoticeable miss sometimes while not under load,"
----------------------------------------------------------------------------------------------------------
A vacuum leak can cause that . There is more vacuum at low speed . Check hoses , carb...
The brush reminds me of one i modified to clean Cottonwood blooms from Condenser coils .
Cut the handle off , chuck it in your drill and spin it for troublesome areas . Yes sir , i've done many things in my life other people don't do .;)
Not only electrical , it could be wise in some areas to be careful around machinery and equipment .
My HVAC man sent this pic to me of a rattle snake in a unit . Why in there ? Most likely looking for mice .
vacuum or air but be certain the area between the engine head and the shroud is clean too . That air flow can be determined while the engine is running by holding our hand down around the spark plugs . It's possible for a mouse build a nest in that area overnight . That may not be possible for...
Try it without it and if it leaks then doctor it with anything recommended for sealing gaskets . A paper thin coat is the most i recommend .
Hundreds of gaskets are sealed with a purchased sealer every day .
If anyone needs a blade more balanced than grams , I have a antique powder scale i can get a blade to balance withen 5 grains . Postage pre-paid both ways .
I believe that switch in the open position is run and closed is kill it . The experience i've had a lawn tractor can be wired to kill the mag or not kill the mag in either position , depending on the wiring design and application . ie - the seat switch is open when off the tractor and that...
If the mower form mechanics could have the engine number they may be able to tell you which engine will bolt to the same holes and the size of the crank and drive pulley .
If you'll buy me a plane ticket i'll take that blade to Denver and get it balanced . If they can't do it Paris i believe is the next step up . :ROFLMAO:
https://www.yellowpages.com/denver-co/crankshaft-balancing
I've seen 3 engines in my life that failed after the valves were lapped . All cylinders on a ford failed simultaneously after about 1,000 miles with broken rings from groove and ring wear . This lap job was done at a ford dealership . Second was a buddy that lapped valves of 1 cylinder on a...
My phone is such a bitch to accomplish anything i send pics from it to my email then transfer to a pic folder titled and dated . From paint.net the pic can be adjusted several ways . Cropped , size changed , color , contrast etc .
Lets go back to the basics rather than spend more money .
We know it has spark (at the correct time ) , air and gas because it is running part time but not starting when hot .
Possibly some of the shop owners here can direct you a item that heat may cause no start .
Fuel is a simple test (...