All engines get dirty inadvertent collision earth just routine accumulation dirt grime flying photo sequence shows just easy cleaning chore should done often New engines necessarily clean des pite efforts manufacturers new engine should visually inspected removing back cover manufacturers generally recom mend further dismantling new engine kind inspection shows clean two basic types crankcase de sign used engines has main bearing crankshaft front 1 Use correct type size screwdriver screws Remove carburetor linkages exaust system first usually held place two screws side air intake case integral access through back cover plate other has bearing made front cov er removable type may may have back cover plate Both types shown pictures EL F Randolph clean engine aftergoing through 14 illus trated steps engines quite simple operation truly jewels precision man ufacturing Dirt enemy deserve keot clean 34 Model Aviation 2 Between carburetor air intake usually 0-ring seals carburetor intake should fit well relatively soft 3 Remove drive washer propeller slirni inie unne isa thin steel washer between drive washer crankcase prevent abrasion electric starter used 4 Take bawl puma OTT O removing screws tna noia place may gasket between plate case remove care fully Some engines no back plate later Remove screws hold head place LitI head note baffle top piston side awayfrom exhaust port Schnuerle-ported engines have no baffle some engines gasket between head cylinder 6 k tIC .uaIJ O FCJVCU L,U bICVVU Udil UU IIULUU OUt inoie inc oy pass porting skirt sleeve bypass case visible opposite exhaust port August1981 35 7 Rotate crankshaft until piston its highest point uses short piece soft wire slide pin out pistonexposing top connecting rod 8 Remove connecting rod lifting crank pin crankshaft counterbalance engine shown old 05 Max 15 cransnarr am ot case Ins Troni engines equipped ball bearings may necessarytotap frontof shaft block wood dislodge bearings 10 ome engines nave removaoie tront cover inst carries crank shaft its bearings removed connecting rod piston free be. 11. ed out top cylinder need ci removing sleeve case ringed engines ring must compressed fingerswhen piston returned intothe cylinder Again note baffle 12 Put engine parts clean coffee can water good all-purpose detergent Years ago used gasoline clean engines now does good job dangerous Use detergent water best results 13 Shake slosh can few times pour out dirty water Use s toothbrush areas still dirty add water detergent Shake some Pour out soapy water rinse engine thoroughly hot water several timesthen drythe parts paper towel Complete drying process heat gun hair dryer until moisture gone 14 OIl mating parts lightly good oil reassemble same sequence taken apart use photos guide Usually necessary disassemble carburetor forthis type cleaning should necessary consult instruction manual
Edition: Model Aviation - 1981/08
Page Numbers: 34, 35
All engines get dirty inadvertent collision earth just routine accumulation dirt grime flying photo sequence shows just easy cleaning chore should done often New engines necessarily clean des pite efforts manufacturers new engine should visually inspected removing back cover manufacturers generally recom mend further dismantling new engine kind inspection shows clean two basic types crankcase de sign used engines has main bearing crankshaft front 1 Use correct type size screwdriver screws Remove carburetor linkages exaust system first usually held place two screws side air intake case integral access through back cover plate other has bearing made front cov er removable type may may have back cover plate Both types shown pictures EL F Randolph clean engine aftergoing through 14 illus trated steps engines quite simple operation truly jewels precision man ufacturing Dirt enemy deserve keot clean 34 Model Aviation 2 Between carburetor air intake usually 0-ring seals carburetor intake should fit well relatively soft 3 Remove drive washer propeller slirni inie unne isa thin steel washer between drive washer crankcase prevent abrasion electric starter used 4 Take bawl puma OTT O removing screws tna noia place may gasket between plate case remove care fully Some engines no back plate later Remove screws hold head place LitI head note baffle top piston side awayfrom exhaust port Schnuerle-ported engines have no baffle some engines gasket between head cylinder 6 k tIC .uaIJ O FCJVCU L,U bICVVU Udil UU IIULUU OUt inoie inc oy pass porting skirt sleeve bypass case visible opposite exhaust port August1981 35 7 Rotate crankshaft until piston its highest point uses short piece soft wire slide pin out pistonexposing top connecting rod 8 Remove connecting rod lifting crank pin crankshaft counterbalance engine shown old 05 Max 15 cransnarr am ot case Ins Troni engines equipped ball bearings may necessarytotap frontof shaft block wood dislodge bearings 10 ome engines nave removaoie tront cover inst carries crank shaft its bearings removed connecting rod piston free be. 11. ed out top cylinder need ci removing sleeve case ringed engines ring must compressed fingerswhen piston returned intothe cylinder Again note baffle 12 Put engine parts clean coffee can water good all-purpose detergent Years ago used gasoline clean engines now does good job dangerous Use detergent water best results 13 Shake slosh can few times pour out dirty water Use s toothbrush areas still dirty add water detergent Shake some Pour out soapy water rinse engine thoroughly hot water several timesthen drythe parts paper towel Complete drying process heat gun hair dryer until moisture gone 14 OIl mating parts lightly good oil reassemble same sequence taken apart use photos guide Usually necessary disassemble carburetor forthis type cleaning should necessary consult instruction manual