You did not finish the statement about without the blades but if your saying what I thing you are...Ah Oh Sounds like you may have a bent crank..Did you hit something with the blades...take the belt off and start the motor..and Check for wobble of the V drive there should be NONE if it does it could be bent itself or the crank...good luck
Sounds like a bad coil to me ... it only makes sense that has the heat from the engine transfers into the coil the coil windings expand and causes a open resulting in ignition failure and no spark to the plugs... if you need parts try www.partstree.com
This video shows several belt patterns for various mowers. I am assuming you are wanting the deck belt and not the drive belt. 4 seconds into the video is the standard craftsman 42 inch belt path. The belt at the bottom is put on the engine pulley. Tip from my own experince make sure that the belt is under the belt guides or you will ruin a belt in short order. Your model number is under the seat and is also a scanable barcode. Another tip is to snap a photo of your model numbers. This is handy when you need parts. More accurate and readable than writing it down. Riding Mower Deck Belt Diagram DIY
Check the ignition switch condition and operation.
The electrical contacts in the run position may be worn or damaged.
Try restarting the engine with all electrical accessories in the off
position. Sometimes turning the key on an off will help in emergency
situations, however once the switch has shown signs of failure, it
should be replaced as soon as possible.
Check for loose, corroded, damaged or shorted wires for the ignition system and repair or replace.
Check for manifold vacuum leaks or vacuum hose leakage and repair or replace parts as necessary.
Measure the fuel pump delivery volume and
pressure. Low fuel pump pressure can also be noticed as a lack of
power when accelerating. Make sure the fuel pump lines are not
restricted. The fuel pump output is not adjustable and requires fuel
pump replacement to repair.
Check the engine fuel and ignition management
system. Inspect the sensor wiring and electrical connectors. A dirty,
loose or damaged sensor or control module wire can simulate a failed
Check the exhaust system for internal restrictions.
Must be a dead short in wire to solenoid, trace wire back from solenoid plug through wirring harness till you find bare or damaged wire and repair with electrical tape. Try to determine what caused this condition and repair that also so it cant happen again
Drain oil... it is full of gasoline due to a bad float pin and rubber gromet in your carb. When your float pin and gromet fail, gas just keeps flowing into your carburetor, eventually flooding your motor with gas and oil mix.
I believe that's a tecumseh trans axle. They really aren't a serviceable part. But it you're brave... Yeah I've torn them apart to replace bearings and such. I never found a "spec" for the lube but it's really heavy. I used a nice sticky molly grease when ever I put one back together.