Mystic IHC Mogul Engine — Part 3

1916 1 HP IHC Mogul is put back together … and runs again — Part 3 of 3

| October/November 2012

  • IHC Mogul Engine
    The 1916 1 HP IHC Mogul is put back together ... and runs again. 
    Photo By Peter Rooke
  • New Fuel Lines In Place
    The new fuel lines in place. 
    Photo By Peter Rooke
  • IHC Mogul's Fuel Pump
    The stripped fuel pump; note the condition of the plunger. 
    Photo By Peter Rooke
  • Check Ball Seats
    Lapping the check ball seats. 
    Photo By Peter Rooke
  • Packing Retaining Ring on Plunger
    The plunger with the packing retaining ring attached. 
    Photo By Peter Rooke
  • Refurbished IHC Mogul Pump
    The refurbished pump. 
    Photo By Peter Rooke
  • Modern Elbow Connects Fuel Line From Tank
    The modern elbow connecting the fuel line from the tank. 
    Photo By Peter Rooke
  • Oversize Plunger and Old Plunger
    The new oversize plunger alongside the old plunger. 
    Photo By Peter Rooke
  • Filler Pipe Connector
    The filler pipe connector repair. 
    Photo By Peter Rooke
  • Brass Fuel
    New brass fuel-in pipe before trimming to length, along with bending springs and homemade bending dies. 
    Photo By Peter Rooke
  • IHC Modul Engine's Igniter
    The igniter as removed from the engine. 
    Photo By Peter Rooke
  • Igniter Stripped
    The igniter stripped. 
    Photo By Peter Rooke
  • Igniter Painted
    The igniter painted and ready for fitting to the block. 
    Photo By Peter Rooke
  • Electrolysis
    The first electrolysis setup. 
    Photo By Peter Rooke
  • Plates After Electrolysis
    The two “rusted” plates.
    Photo By Peter Rooke
  • Painted IHC Mogul Engine
    The painted engine with the hopper marked to align the decal. 
    Photo By Peter Rooke
  • Fuel Tank
    Fitting the fuel tank. 
    Photo By Peter Rooke
  • Gear Wheel
    Gear wheel fitted to the flywheel. 
    Photo By Peter Rooke
  • Governor Weights
    Governor weights and collar fitting to the flywheel. 
    Photo By Peter Rooke
  • Fitted Hopper
    The fitted hopper. 
    Photo By Peter Rooke
  • Ring Compressor
    Using the ring compressor fitting the piston. 
    Photo By Peter Rooke
  • Timing Mark On Gear
    Paint marking timing mark on gear. 
    Photo By Peter Rooke
  • Crankshaft and Bearing Plate Fitted
    The crankshaft and bearing plate fitted. 
    Photo By Peter Rooke
  • Eccentric/Pump Lever Fitting
    The fuel pump dropped to allow for the fitting of the eccentric/pump lever. 
    Photo By Peter Rooke
  • Igniter and Trip
    The igniter and its trip assembled. 
    Photo By Peter Rooke
  • Cylinder Head Fitted
    The cylinder head fitted. 
    Photo By Peter Rooke
  • New Gaskets
    New gaskets cut for the fuel mixer.
    Photo By Peter Rooke
  • Flywheel Timing Marks
    The timing marks on the flywheel. Top Dead Center was also marked for reference.
    Photo By Peter Rooke
  • Finished IHC Mogul Engine
    The finished IHC Mogul Engine. 
    Photo By Peter Rooke

  • IHC Mogul Engine
  • New Fuel Lines In Place
  • IHC Mogul's Fuel Pump
  • Check Ball Seats
  • Packing Retaining Ring on Plunger
  • Refurbished IHC Mogul Pump
  • Modern Elbow Connects Fuel Line From Tank
  • Oversize Plunger and Old Plunger
  • Filler Pipe Connector
  • Brass Fuel
  • IHC Modul Engine's Igniter
  • Igniter Stripped
  • Igniter Painted
  • Electrolysis
  • Plates After Electrolysis
  • Painted IHC Mogul Engine
  • Fuel Tank
  • Gear Wheel
  • Governor Weights
  • Fitted Hopper
  • Ring Compressor
  • Timing Mark On Gear
  • Crankshaft and Bearing Plate Fitted
  • Eccentric/Pump Lever Fitting
  • Igniter and Trip
  • Cylinder Head Fitted
  • New Gaskets
  • Flywheel Timing Marks
  • Finished IHC Mogul Engine

This is the third part in a three part series on Peter Rooke's restoration of a 1 HP IHC Mogul engine. You can read part 1 in Mystic IHC Mogul and part 2 in Mystic IHC Mogul Engine — Part 2. 

Fuel Pump 

The IHC Mogul’s fuel pump was seized and looked a little worse for wear. When I stripped down the fuel pump I found that the check balls were stuck, the plunger was bent and badly worn around the packing, and an ordinary flat washer was the only thing holding the gland packing in place.

I thoroughly cleaned the pump and lapped the seats for the check balls using grinding paste and a steel ball that I super glued to a length of brass tube. The bore of the pump looked a bit rough so I reamed it out to 0.0625 inches over size. I made a new plunger to fit the bore, replacing the 0.3125-inch original, which had worn down to less than 0.30 inches around the packing.

Making the new pump plunger on the IHC Mogul was a simple turning task; I used brass rod, with a 0.125-inch cross hole drilled 0.15 inches from the top for the split pin to hold the spring end cap.



The washer that had been used to hold the packing around the pump plunger was only doing half a job: It was keeping the packing in place but it was not compressing it around the plunger.

To make a new packing ring I turned some brass rod to 0.75-inch diameter to fit the recess in the pump body and then drilled the rod through so the new piston was a good sliding fit. I cut a recess 0.625 inches in diameter and 0.125 inches deep in the top of the packing ring for a seat for the spring, and then I cut a 30-degree taper in the bottom side. This taper compresses the packing around the piston when the ring is under tension from the spring. I cut some new 0.125-inch diameter graphite packing to fit, although mop string and soap work equally well. I fit new check balls, and after painting I reassembled the pump.



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