Mystic IHC Mogul Engine

Restoration begins on a 1916 1 HP IHC Mogul Engine, including stripping the engine and assessing the condition of the cylinder head and crankshaft — Part 1 of 3

| June/July 2012

  • Mogul at Purchase Time
    The IHC Mogul engine at the time of purchase
  • IHC Mogul Hopper Removed
    The cylinder/hopper removed
  • Mogul Stripped Main Casting
    The stripped main casting
  • Hydraulic Puller Removes Flywheel
    Using the hydraulic puller to remove the flywheel
  • Mogul Broken Gib Key
    The broken gib key
  • IHC Mogul Shows Piston
    Cylinder head removed to show piston
  • IHC Mogul Without Fuel Pump
    The Mogul after removing the fuel pump, eccentric and igniter trip
  • Mogul Opened Hand Hole
    Opened hand hole after removing four bolts to show big end bolts
  • Mogul's Fuel Tank
    Fuel tank under crankcase
  • IHC Mogul's Fuel Tank
    The fuel tank removed
  • IHC Mogul Crankcase Side Plate, Con Rod and Piston
    Crankcase side plate, con rod and piston
  • Mogul's Crankcase
    The IHC Mogul engine's crankcase
  • Bent Needle Valves
    Original, bent needle valves 
  • IHC Mogul Ready for Priming
    Mogul's cleaned main castings ready for priming
  • Mogul Mixer Showing Signs of Wear
    Mixer showing signs of wear, with bent needle valves
  • New Needle Valve Stems
    New needle valve stems
  • IHC Mogul's Cylinder Head
    The IHC Mogul cylinder head
  • Mogul's Stripped Mixer Assembly
    Stripped mixer assembly
  • Turning Brass Rod
    Turning the brass rod to size
  • Brass Stem from Throttle Plate Securing Screws
    Drilling the brass stem from throttle plate securing screws
  • Starting to Drill
    Starting to drill out the IHC Mogul's butterfly pivot rod
  • Slitting the Brass Rod
    Slitting the brass rod for the butterfly valve
  • Parting Off Throttle Plate
    Parting off the new throttle plate
  • Butterfly Parts
    The parts for the butterfly
  • Activate Butterfly Valve
    Bent rod to activate butterfly valve
  • Test Assembly
    Test assembly of the butterfly valve

  • Mogul at Purchase Time
  • IHC Mogul Hopper Removed
  • Mogul Stripped Main Casting
  • Hydraulic Puller Removes Flywheel
  • Mogul Broken Gib Key
  • IHC Mogul Shows Piston
  • IHC Mogul Without Fuel Pump
  • Mogul Opened Hand Hole
  • Mogul's Fuel Tank
  • IHC Mogul's Fuel Tank
  • IHC Mogul Crankcase Side Plate, Con Rod and Piston
  • Mogul's Crankcase
  • Bent Needle Valves
  • IHC Mogul Ready for Priming
  • Mogul Mixer Showing Signs of Wear
  • New Needle Valve Stems
  • IHC Mogul's Cylinder Head
  • Mogul's Stripped Mixer Assembly
  • Turning Brass Rod
  • Brass Stem from Throttle Plate Securing Screws
  • Starting to Drill
  • Slitting the Brass Rod
  • Parting Off Throttle Plate
  • Butterfly Parts
  • Activate Butterfly Valve
  • Test Assembly

This IHC Mogul engine was imported into the UK in 2008 and I jumped at the opportunity to buy it. It was in need of a full restoration as it was missing the magneto, had no proper muffler and the mixer valve stems were bent. It looked as though it had been restored some time ago as the paintwork had been badly applied and was not the usual color you would expect. There was one saving grace — the skid looked original.

The serial number lists showed this particular engine (W13364) was built in 1916. The Mogul series of engines was built between 1911 and 1917, and was a predecessor of the Type M, which was first built in 1917.

Stripping the IHC Mogul engine

Starting the restoration, the first step was to strip the engine so that the previous paint job could be removed. First, I carefully scraped off a little of the paint in different areas to see if there was any original paint lurking underneath. Unfortunately the answer was no, not even any primer coat, and rust was beginning to form in several places under the paint, which had clearly been applied to an unprepared surface.

I removed the two oilers, one of which had already broken into two pieces before the engine reached me, then the greasers. Next, I removed the exhaust pushrod and then the exhaust pipe.



Removing the flywheels

When it came to removing the flywheels, the first problem occurred while using a tapered chisel to remove the gib key when the head came off the gib key on the muffler-side flywheel. This was despite already cleaning the shaft and applying a generous amount of release agent a couple of days earlier.

This meant I would have to drill out the key to extract it before removing the flywheel. The keys were made from 0.3125-inch wide steel so I center-drilled a similar piece with a 0.125-inch pilot hole before clamping it in the keyway and using it as a drill guide. Starting with this small drill size, I drilled a 3-inch deep hole in the key, and then opened up this hole in stages to just less than 0.3125-inch. After drilling out the key, I made several unsuccessful attempts to turn the flywheel on the shaft, with a wooden block positioned under the crankshaft web to lock it.



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