MTD990 Repower

This engine has a 3 brush 6V generator. This is a 12V tractor. It barely keeps up with the current draw of the ignition. So, I'm replacing it with a magneto. Now the ignition isn't running down the battery when the engine is running. A 12V charging system will be added later. Magneto timing is fixed. Set the crank shaft to top dead center. Install the magneto with the marked timing gear visible in the inspection hole. Timing done! Enjoy Checkout my Train Stuff channel. https://rumble.com/c/TrainsStuff And my Wandering About channel. https://rumble.com/c/c-1192873 Thank's

Nothing on the back of this tractor is centered or symmetrical. A neat "feature" of putting the rear tire weight on the inside. The pin on the right side doesn't fit!

The MTD900 Wisconsin THD engine swap project Not much progress today. My shiny "new" chrome timing light is no-op. Something to look at later. Charging WOWs. Confirmed my suspicion the generator is 6V. 12V generator should output 19 to 20 volts.

Even projects need repair from time to time. Rear seal replacement with bonus rear inner wheel weight removal. Weights are 60 lb each. Stay tuned for the next exciting installment. Amping up my charging circuit wows.

MTD900 Wisconsin THD engine swap project https://rumble.com/c/c-576013 The rear accessory mount for throttle cable and gas line input.

MTD900 Wisconsin THD Repower https://rumble.com/c/c-576013 Working on the dash tower. A project for a Wisconsin 2 cylinder. The MTD900 is a nice fit. Want to have a useful machine. To do list. PTO pulleys. Proper gas tank. Proper three point. Charging circuit. It has the classic one head light look, but proper lighting at some point.

May 28, 2022 THD990 Project. After fixing the distributor terminal. Checked the timing. Something that needed to be done anyway.

Scored a nice Century battery charger. Looks like new, works like new. Bought a second running MTD990 with a good mowing deck. Swapped the rear tires. Like the classic look better. The "new" tractor came with wheel weights. Kept the weights for this tractor. I tuned and greased the new tractor. I gave it to my grandniece. Every little girl needs her own tractor. :) More work on the exhaust. Works for now. Fixed the parking brake. One of the friction pads as missing. Reworked the parking brake pull lever. I notice the head gasket was leaking. Pulled the head. Wet sanded the head on a piece of glass till the lows spots were gone. Double checked the head bolt torque. Added a heat vent to the hood. Added a gas strainer. After adding the gas strainer the engine would not start. After some investigation I found no spark. After some more investigation I found the insulator on the distributor electrical post was brittle and broken. Grounding the ignition. Glad it failed at home in the garage.

Cool, useful wrench from the swap meet. More tweaking on the steering. Patched the ratty spark plug holes in the cooling shroud. Massive improvement in cooling air flow. Need to start looking at the charging circuit. Killed most of the hood rattle. Oil bath didn't have the oil bath part. Replaced it with a paper filter. Bad acoustics, last time filming next to the house. Much better sound. This camera on a glumy afternoon with low light. https://rumble.com/vfpn1x-cn-heafford-junction.html

I expected everything to need rework. Move one thing and ... The steering is more work than anticipated. Worked fine jacked up with no weight. On the ground turning right it would bind. Maybe 25% turning left and 80% tuning right. Found a lot of wear between the front axle and the spindles. I drilled the axle and added bushing. Much better but still needs work. I drilled it with a drill press. I think a mill would have been a better choice. If only I had a mill. Or drilled through and add a sleeve. Join rumble https://rumble.com/register/pb1500/

3 Of many more to come. First test drive with relocated steering column complete with camera cap and strap. Plan B works, not complete yet. But works as it should. Plan A was a complete failure. Join rumble https://rumble.com/register/pb1500/

MTD990 Repowered with a THD Wisconsin. Jan 2021 Join rumble https://rumble.com/register/pb1500/

MTD990 repower with Wisconsin THD First Drive. November 2020 Join rumble https://rumble.com/register/pb1500/