Order No. Item Price
21’s (3.5cc)
#OPS87700US .21 Side Exh. Engine w/pipe Retail - $279.99 
Our Price - $185.00
#OPS3040   .21 Wrist Pin Retail - $3.80
Our Price - $3.45
#OPS3050    .21 Wrist Pin Retainers Retail - $4.15
Our Price - $3.75
#OPS3120   .21 Back Plate Gaskets (2) Retail - $3.50
Our Price - $3.15
#OPS3130    .21 Backplate O-Ring (2) Retail - $3.50
Our Price - $3.15
#OPS3140    .21 Carb Retainer Retail - $1.75
Our Price - $1.57
#OPS3210    .21 Side Exh Case Retail - $73.00
Our Price - $65.70
#OPS3230   .21 Crankshaft Retail - $48.00
Our Price - $43.20
#OPS3240    .21 Backplate Retail - $11.00
Our Price - $10.00
#OPS3340  .21 Side Exh. Header  Retail - $23.00 
Our Price - $20.70
#OPS3371   .21 Piston & Sleeve Retail - $84.00
Our Price - $75.60
#OPS3400   .21 Rear Plate Screws (4) Retail - $1.75 
Our Price - $1.58
#OPS3401  .21 complete screw set  Retail - $8.00 
Our Price - $7.20
#OPS3411  .21 Head Shim .004 (pr.) Retail - $1.00 
Our Price -  $.90
#OPS3411P    .21 Head Shim .004 (10) Retail - $5.00
Our Price - $4.50
#OPS3412   .21 Head Shim .008 (pr.)  Retail - $1.00
Our Price - $.90
#OPS3412P   .21 Head Shim .008 (10) Retail - $5.00
Our Price - $4.50
#OPS3521  .21 Con Rod Retail - $45.00 
Our Price - $40.50
#OPS3540    .21&.45 std. Rear Brg. Retail - $26.40
Our Price - $23.75
#OPS3880 .21 Side Exhaust Manifold  Retail - $12.00
Our Price - $10.80
#OPS3880S  .21 S.E. Exhaust Screws (2) Retail - $1.00 
Our Price - $.90
#OPS3920    .21 Muffled Pipe Retail - $40.00
Our Price - $36.00
#OPS4280    .29/.40 Pipe Retail - $40.00
Our Price - $36.00
#OPS3930   .21 Flywheel  Retail - $15.00
Our Price - $13.50
#OPS3950    .21 Water Cooled Head Retail - $15.00
Our Price - $13.50
#OPS3960   .21 Head insert  Retail - $15.00
Our Price - $13.50
#OPS3980    .21/.45 Frt. Brg. Shielded Retail - $11.00
Our Price - $9.90
#OPS4940    .21/.45 Flywheel Cone Retail - $6.00
Our Price - $5.40
#OPS4970   .21 Head Bolts (4) Retail - $2.50 
Our Price - $2.25
#OPS9012    .21 Carb Retail - $52.00
Our Price - $46.00
#OPS87701   .21 Rear Exh. Marine Engine w/pipe Retail - $550.00
Our Price - $325.00
#OPS3055    .21 Rally Pist. & Sleeve Retail - $126.50
Our Price - $113.85
#OPS3070    .21 Rear Exh. Crankcase Retail - $84.99
Our Price - $75.00
#OPS3075    .21 Rear Exh Pro Crankcase Retail - $99.99
Our Price - $89.00
#OPS3095    .21 Rear Exh. Rally Case Retail - $115.83
Our Price - $103.00
#OPS3117    .21 Rear Exh. Adapter Retail - $12.99
Our Price - $11.70
#OPS3134    .21 Rally Backplate O-Ring (2) Retail - $3.50
Our Price - $3.15
#OPS3147    .21 Carb Retainer Brass Retail - $17.00
Our Price - $15.30
#OPS3235    .21 Pro Crankshaft Retail - $82.00
Our Price - $73.80
#OPS3236 .21 Super Crankshaft Retail - $132.00 
Our Price - $118.00
#OPS3237   .21 13MM Pro Crankshaft Retail - $105.00 
Our Price - $94.50
#OPS3265    .21 “U” Exh. Header Rear Retail - $27.00
Our Price - $24.30
#OPS3269  .21 “U” Header Retaining Spring Retail - $1.60 
Our Price - $1.40
#OPS3350   .21 Head Screws (4)  Retail - $4.75
Our Price - $4.25
#OPS 3400A   .21 Rally rear plt. screws (4) Retail - $2.00
Our Price - $1.80
#OPS3415  .21 Head Shim .002 (pr.)  Retail - $1.00
Our Price - $.90
#OPS3415P .21 Head Shim .002 (10) Retail - $5.00
Our Price - $4.50
#OPS3524   .21 Supermarine Rod  Retail - $56.00
Our Price - $50.00
#OPS3544    .21 Super Rear Brg. Retail - $31.00
Our Price - $27.90
#OPS3547    .21 13mm Rear Brg. Retail - $31.00
Our Price - $27.90
#OPS3962    .21 Head insert (4 bolt) Retail - $15.00
Our Price - $13.50
#OPS3975    .21 Super Insert (6 bolt Std. Plug) Retail - $19.00
Our Price - $17.10
OPS .45  (7.5cc)
ABC Liner/Piston,rotary valve,carb w/idle needle or slide valve with optimal progression from idle to full speed, bronze bushed high rpm rod, cylinder transfers with by-passes and top domed exhaust port to give the highest performance and reliability.
  • Displacement-7.43cc
  • Power-2.60HP
  • Bore-22.00mm
  • Stroke-19.5mm Weight-465g
  • RPM-24000
#OPS87110US    .45 Marine Engine w/pipe Retail - $395.00
Our Price - $255.00
#OPS3540 .   .45/.21 Rear Brg Retail - $26.40
Our Price - $23.75
#OPS3980 .45/.21 Front Brg.  Retail - $11.00
Our Price - $9.90
#OPS4010    .45 Front Plate Screws (4) Retail - $2.50
Our Price - $2.25
#OPS4040    .45 Wrist Pin Retail - $3.99
Our Price - $3.59
#OPS4050   .45 Pin Retainers (2) Retail - $1.15 
Our Price - $1.05
#OPS4071    .45 Crankcase Retail - $99.00 
Our Price - $89.00
#OPS4091    .45 Frt. Brg. Housing Retail - $24.99
Our Price - $22.50
#OPS4120  .45 Frt. Housing Gsk. (2)  Retail - $3.50 
Our Price - $3.15
#OPS4376    .45 Piston & Sleeve Retail - $99.00
Our Price - $89.00
#OPS4390   .45 Rear Plate Screws (4) Retail - $2.50
Our Price - $2.25
#OPS4411  .45 .004 Head Shim (2)  Retail - $1.25
Our Price - $1.10
#OPS4411P   .45 .004 Head Shim (10)  Retail - $6.25
Our Price - $5.62
#OPS4412  .45 .008 Head Shims (2)  Retail - $1.25
Our Price - $1.10
#OPS4511    .45 Con Rod Retail - $39.00
Our Price - $35.00
#OPS4541  .45 Flywheel w/cone  Retail - $26.50
Our Price - $23.85
#OPS4615 .45 Crankshaft etail - $69.00
Our Price -  $62.00
#OPS4661   .45 Backplt. (rotor hsg.)  Retail - $29.00
Our Price - $26.00
#OPS4671    .45 Rotor Shaft Retail - $4.85
Our Price - $4.35
#OPS4680    .45 Rotor Valve Retail - $63.00
Our Price - $56.70
#OPS4885    .45 Exh. Angled Adapt. Retail - $12.85
Our Price - $11.55
#OPS4887   .45 Water Cooled Exh.Plt.  Retail - $13.50
Our Price - $12.15
#OPS4931  .45 Flywheel Retail - $23.00 
Our Price - $20.70
#OPS4940   .21/.45 Flywheel Cone  Retail - $6.00
Our Price - $5.40 
#OPS4955  .45 Water Cooled Head  Retail - $14.85
Our Price - $13.35
#OPS4965   .45 Nitro Head Button  Retail - $16.25
Our Price - $14.65
#OPS9021    .45 Carb Retail - $52.00
Our Price - $46.00
OPS .67/80
ABC Liner/Piston,OPS Classic 3+2 port design,additional piston and sleeve by-passes to increase power at top RPM by 10%, and to optimize cooling and lubrication of piston and rod. New perfectly matched drum valve for more dependability and more efficient fuel usage.
  • Displacement-11cc/13cc
  • Power-4.35/4.65HP
  • Bore-24.58/27.00mm
  • Stroke-23.00mm
  • RPM-23000/23200
  • Weight-680/730g
#OPS82811US    .67 Drum Vlv/Needle Rod Retail - $557.00
Our Price - $359.00
#OPS82711US    .67 Drum w/std. Rod Retail - $557.00
Our Price - $359.00
#OPS4360    .67/.80 Front Bearing Retail - $14.85
Our Price - $13.35
#OPS6010F    .67 Frt. Plate Screws (4) Retail - $2.50
Our Price - $2.25 
#OPS6010R   .67 Rear Plate Screws (4) Retail - $2.50
Our Price - $2.25
#OPS6040    .67 Wrist Pin Retail - $3.50
Our Price - $3.15
#OPS6050    .67/.80 Pin Retainers (2) Retail - $1.50
Our Price - $1.35
#OPS6080   .67/.80 Rear Brg.  Retail - $14.85
Our Price - $13.35
#OPS6110   .67 Strt. Exh. Adap. Retail - $18.00
Our Price - $16.20
#OPS6130    .67 Exh. Gaskets (2) Retail - $2.50
Our Price - $2.25
#OPS6180    .67/.80 Crank Stud Retail - $2.50
Our Price - $2.25
#OPS6250    .67/.80 Aero Prop Adap Retail - $12.00
Our Price - $10.80
#OPS6261    .67/.80 Flywheel Assem. Retail - $28.00
Our Price - $25.20
#OPS6280   .67 Tuned Pipe Retail - $45.00
Our Price - $40.00
#OPS6371   .67 Piston and Sleeve  Retail - $126.95
Our Price - $116.95
#OPS6421 .67 .003 Head Shims (2) Retail - $2.75
Our Price - $2.45
#OPS6421P    .67 .003 Head Shims (10) Retail - $13.25
Our Price - $11.90
#OPS6422    .67 .006 Head Shims (2) Retail - $2.75
Our Price - $2.45
#OPS6422P    .67 .006 Head Shims (10) Retail - $13.25
Our Price - $11.90
#OPS6430 .67 Crankcase   Retail - $109.75
Our Price - $98.00
#OPS6510   .67/.80 Std. Rod  Retail - $45.00
Our Price - $40.00
#OPS6520    .67/.80 Needle Rod Retail - $54.50
Our Price - $49.00
#OPS6580    .67/.80 Front Brg. Housing Retail - $31.00
Our Price - $27.90
#OPS6600   Carb Retainer Retail -  $1.80
Our Price - $1.65
#OPS6660   .67/.80 Backplate Retail -  $34.00
Our Price - $30.60
#OPS6661   .67/.80 Drum Rotor Assem Retail - $215.00
Our Price - $190.00
#OPS6670    .67/.80 Rotor Pin Retail - $7.50
Our Price - $6.75
#OPS6680    .67/.80 Rotor Disk Retail - $70.00
Our Price - $63.00
#OPS6750   .67/.80 Needles for Rod Retail -  $11.00
Our Price - $9.90
#OPS6780  .67 Muffled Pipe  Retail -  $60.00
Our Price - $54.00
#OPS6850 .67/.80 Crankshaft Retail - $66.00
Our Price - $59.40 
#OPS6870   .67/.80 Needle Brg Crank Retail - $73.00
Our Price - $65.70
#OPS6880    .67 Marine Exh. Adapt. Retail - $19.50
Our Price - $17.55
#OPS6887    .67 W.C. Exh. Plate Retail - $15.00
Our Price - $13.50
#OPS6920    .67 Tuned Pipe Retail - $50.00
Our Price - $45.00
#OPS6940   .67/.80 Flywh. Cone Retail - $6.00
Our Price - $5.40
#OPS6951   .67/.80 Finned W.C. Head Retail - $34.00
Our Price -  $30.60
#OPS6961   .67 Nitro Head Retail -  $20.65
Our Price - $18.60
#OPS6971    .67/.80 Head Bolts (4) Retail - $2.50
Our Price - $2.25
#OPS7230  .67/.80 Case Gaskets (2) Retail - $3.50
Our Price - $3.15
#OPS7230P    .67/.80 Case Gaskets (10) Retail - $11.00
Our Price - $9.90
#OPS90286   .67/.80 Carb for Drum Ro Retail - $80.00
Our Price - $72.00
.80 (13cc)
Note: .67 Engines share many parts with .80 these parts are specific to the .80- see .67 list for all other parts.
#OPS85002US    .80 Drum Vlv/Std.Rod Retail - $569.00
Our Price - $369.00
#OPS85003US   .80 Drum Vlv.Needl.Rod Retail - $569.00
Our Price - $369.00 
#OPS6048 .80 Wrist Pin Retail - $3.50
Our Price -  $3.15
#OPS6118   .80 Strt. Exh. Adapter Retail - $18.00
Our Price - $16.20
#OPS6138   .80 Exh. Gaskets (2)  Retail - $2.50
Our Price - $2.25
#OPS6378    .80 Piston & Sleeve Retail - $131.00
Our Price - $117.00
#OPS6438    .80 Crankcase Retail - $109.75
Our Price - $98.00
#OPS6481  .80 .003 Head Shims (2) Retail - $2.75
Our Price - $2.45
#OPS6481P    .80 .003 Head Shims (10) Retail - $13.25
Our Price - $11.90
#OPS6888    .80 W.C. Exh. Adapt. Ang. Retail - $32.00
Our Price - $28.80
#OPS6968   .80 Head Button Nitro Retail - $21.00
Our Price -  $18.90
#OPS6869   .80 Head Button Std. Retail - $21.00
Our Price - $18.90
OPS .90
ABC Liner/Piston,OPS Classic 3+2 port design, ports timed for top performances in oval racing in monos or cats, laminar intake valve with driver on ball bearings and needle bearing con rod to give high reliability and performance.
  • Displacement-14.87cc
  • Power-6.05HP
  • Bore-27.00mm
  • Stroke-26.00mm
  • RPM-21000
  • Weight-1250g
#OPS89001US   .90 w/ Needle Rod Retail - $655.00
Our Price - $425.00
#OPS4350  .90 Rotor Shaft Brg. (1) Retail - $10.50
Our Price - $9.45
#OPS5010 .90 Frt. Plate Screws (4) Retail - $2.50
Our Price - $2.50
#OPS5040  .90 Wrist Pin  Retail - $7.45
Our Price - $6.70
#OPS5050  .90 Wrist Pin Clips (2) Retail - $1.50
Our Price - $1.35
#OPS5050P   .90 Wrist Pin Clips (10) Retail - $7.00
Our Price -  $6.30
#OPS5080  .90 Rear Bearing Retail - $18.50
Our Price - $16.65
#OPS5101    .90 Finned Cylinder Retail - $73.00
Our Price - $65.70
#OPS5130   .90 Exh. Gasket (1)  Retail - $2.50
Our Price - $2.25
#OPS5131 .90 Head Gaskets (2) Retail - $4.50
Our Price - $4.00
#OPS5190   .90 Rotor Shaft Retail - $46.00
Our Price - $41.50
#OPS5201 .90 Rotor Disk  Retail - $31.25
Our Price - $28.00
#OPS5220   .90 Back Plate Retail -  $38.00
Our Price - $25.00
#OPS5230   .90 Rear Case Gasket (2) Retail -  $3.20
Our Price - $2.85
#OPS5260   .90 Flywheel Assembly Retail - $35.95
Our Price - $32.35
#OPS5270   .80/.90 Pipe  Retail - $53.00
Our Price - $47.00
#OPS5360 .90 Front Bearing   Retail - $16.65
Our Price - $15.00
#OPS5371    .90 Piston & Sleeve Retail - $150.00
Our Price - $135.00
#OPS5412   .90 .003 Head Shims (2) Retail - $3.35
Our Price - $3.00
#OPS5412P    .90 .003 Head Shims (10) Retail - $15.00
Our Price - $13.50
#OPS5420  .90 Head O-ring  Retail - $7.00
Our Price -  $6.30
#OPS5520   .90 Needle brg. Rod Retail -  $70.00
Our Price - $63.00
#OPS5571 .90 Crankcase  Retail - $120.00
Our Price - $108.00
#OPS5580   .90 Front Housing Retail - $47.00
Our Price - $42.30
#OPS5590    .90 Frt. Plate Gaskets (2) Retail - $3.75
Our Price - $3.35
#OPS5590P    .90 Frt. Plate Gaskets (10) Retail - $16.00
Our Price - $14.40
#OPS5750  .90 Needles for Rod Retail - $13.00
Our Price -  $11.70
#OPS5830  .90 Crankshaft  Retail - $130.00
Our Price - $117.00
#OPS5880   .90 W.C. Exh Adapter  Retail - $33.00
Our Price - $29.70
#OPS5890 .90 Carb. Complete  Retail - $87.00
Our Price -  $78.30
#OPS5920   .90 Muffled Pipe Retail - $66.00
Our Price -  $59.40
#OPS5951 .90 Water Cooled Head   Retail - $50.00
Our Price - $45.00
#OPS5961  .90 Std. Head Button Retail - $22.00
Our Price - $19.80
#OPS5962  .90 Nitro Head Butt.  Retail - $22.00
Our Price - $19.80
#OPS5970 .90 Head Bolt (1)  Retail - $6.00
Our Price -  $5.40
#OPS5980    .90 Flywheel Washer Retail - $1.45
Our Price - $1.30
#OPS9900   .90 Head Bolt O-rings (4) Retail - $1.60
Our Price - $1.45

If you would like to order any of our products you may place your order by phone
Monday thru Friday, 8 am to 5 pm Eastern time. at: 302-628-3944
You may also contact us by e-mail at: aeromarine@erols.com