Designed by Steve Andres
| Model Name: 1937 OB11 Neptune | |
| Original carburetor | Tillotson MS-73B |
| Magneto | Eisemann Model 61B |
| Cylinders | 1 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 2 |
| Point gap | 0.020 |
| Sheer pin | 5/32” x 1″ |
| Oil | 2/3 pt. SAE-30 per Gal. |
| Tank | |
| Exhaust | |
| Lower unit | |
| Rope plate | Neptune |
| Model Name: 1937 OB12A Neptune | |
| Original carburetor | Tillotson MS-73B |
| Magneto | Eisemann Model 61B |
| Cylinders | 1 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 2 @ 2800 RPM |
| Point gap | 0.020 |
| Sheer pin | 5/32” x 1″ |
| Oil | 2/3 pt. SAE-30 per Gal. |
| Tank | |
| Exhaust | |
| Lower unit | |
| Rope plate | Neptune |
| Model Name: 1937 OB17 Neptune | |
| Original carburetor | Tillotson MS-47B |
| Magneto | Eisemann Model 82D |
| Cylinders | 2 |
| B x S | 2 1/2” x 2″ |
| HP | 16 @4000 RPM |
| Point gap | 0.020 |
| Sheer pin | 7/32” x 1″ |
| Oil | 1 pt. SAE-30 per Gal |
| Tank | Sheet aluminum |
| Exhaust | Under water |
| Lower unit | Non stream lined ball bearing |
| Rope plate | Neptune |
| Model Name: 1937 OB17A Neptune | |
| Original carburetor | Tillotson MS-47B |
| Magneto | Eisemann Model 82D |
| Cylinders | 2 |
| B x S | 2 1/2” x 2″ |
| HP | 16 @4000 RPM |
| Point gap | 0.020 |
| Sheer pin | 7/32” x 1″ |
| Oil | 1 pt. SAE-40 per Gal |
| Tank | Sheet aluminum |
| Exhaust | Under water |
| Lower unit | Non stream lined ball bearing |
| Rope plate | Neptune |
| Model Name: 1937 OB35 Neptune | |
| Original carburetor | Tillotson MS-45B |
| Magneto | Eisemann Model 72A |
| Cylinders | 2 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 4 @ 3000 RPM |
| Point gap | 0.020 |
| Sheer pin | 5/32” x 1″ |
| Oil | 2/3 pt. SAE-30 per Gal. |
| Tank | Cast aluminum smooth |
| Exhaust | Above water |
| Lower unit | Plain bearing |
| Rope plate | 6″ sand cast Neptune |
| Model Name: 1937 OB35A Neptune | |
| Original carburetor | Tillotson MS-45B |
| Magneto | Eisemann Model 72A |
| Cylinders | 2 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 4 @ 3000 RPM |
| Point gap | 0.020 |
| Sheer pin | 5/32” x 1″ |
| Oil | 2/3 pt. SAE-30 per Gal. |
| Tank | Cast aluminum smooth |
| Exhaust | Above water |
| Lower unit | Plain bearing |
| Rope plate | 6″ sand cast Neptune |
| Model Name: 1937 OB65 Neptune | |
| Original carburetor | Tillotson MS-45B |
| Magneto | Eisemann Model 72A |
| Cylinders | 2 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 6 @ 3400 RPM |
| Point gap | 0.020 |
| Sheer pin | 5/32” x 1″ |
| Oil | 2/3 pt. SAE-30 per Gal. |
| Tank | Smaller sheet aluminum |
| Exhaust | Under water |
| Lower unit | Ball bearing |
| Rope plate | 6″ Neptune |
| Model Name: 1937 OB65A Neptune | |
| Original carburetor | Tillotson MS-45B |
| Magneto | Eisemann Model 72A |
| Cylinders | 2 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 6 @ 3400 RPM |
| Point gap | 0.020 |
| Sheer pin | 5/32” x 1″ |
| Oil | 2/3 pt. SAE-30 per Gal. |
| Tank | Sheet aluminum |
| Exhaust | Under water |
| Lower unit | Ball bearing |
| Rope plate | Neptune |