My question is why Ian you held it in start position until you smoked the starter or did the starter solenoid hang? Now the starter is definitely ruined.
As to the terms Mike was referring the starter gear (pinion gear) to flywheel ring gear. Although the starter gear is normally meshed (teeth one gear properly entering the other) properly they can hang up at times. But I doubt that would could a total seizure. One thing to watch for here is you have the correct starter gear as there are 14 tooth and 16 tooth starter gears and they are not mixable as will have ring tooth entry problems causing both a dragging starter and ring gear damage if a steel start gear is used on a plastic ring gear.
I do have some other questions as can you freely turn the engine by hand with the spark plug out? This tell if the engine is locked up or not.
Actually for remote troubleshooting I would need both the mower model number from the serial tag and the engine's model and type number. But the following might sense as it a list of possible problems.
Currently it could just been a starter that the permanent magnet came lose binding the rotor or seized engine. People are bad the strike these permanent magnet starter motors with a hammer knocking these magnets lose. These magnets can also come lose naturally. Most times they are trying get the starter to turn pass a hard compression stroke. But now I know you will at least need a new starter and starter solenoid in addition to what else.
If this is 31/330000 series engine it is a good that the engine has been ran without oil. These engines are bad about blowing the head gasket which leads to excessive oil usage. May not even smoke during this time. I have personally seen one engine to use a quart of oil to a half gallon of fuel and not smoke. Without oil the piston rod seizes to the crankshaft journal. Once this aluminum transfer starts there is no way to stop it except cleaning the crank journal and replacing the rod. Sometimes can happen during running resulting a snapped rod that can go through the side of the crankcase. Result a ruin engine.
There are few possible root causes as trying the start the against a hard compression stroke. There are three possible causes of hard compression.
- Valves out of adjustment effectively disabling the ACR (automatic compression release).
- Camshaft ACR broken.
- Engine's cylinder is hydro locked caused by a leaky carburetor. Usually the crankcase will also been over filed with gas diluted oil.
- These are the most common problems but are others too.
post edited by AVB - 2019/04/08 09:07:41