Designed by Steve Andres
| Model Name: 1938 16A38 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 | Diecast 6″ Neptune |
| Model Name: 1938 1A38 Neptune | |
| Original carburetor | Tillotson AC-1A |
| Magneto | Eisemann Model 51A |
| Cylinders | 1 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 1.2 @ 3000 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: 1938 2A38 Neptune | |
| Original carburetor | Tillotson MS-73B |
| Magneto | Eisemann Model 61B |
| Cylinders | 1 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 2 @2800RPM |
| 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: 1938 4A38 Neptune | |
| Original carburetor | Tillotson MS-45C |
| 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 | Sheet aluminum |
| Exhaust | Under water |
| Lower unit | Plain bearing |
| Rope plate | Neptune |
| Model Name: 1938 6A38 Neptune | |
| Original carburetor | Tillotson MS-45C |
| 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 |
| Model Name: 1938 9A38 Neptune | |
| Original carburetor | Tillotson MS-99A |
| Magneto | Yarian |
| Cylinders | 2 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 9 @4000 RPM |
| Point gap | 0.020 |
| Sheer pin | 7/32” x 1 1/4“ |
| Oil | 1 pt. SAE-30 per Gal |
| Tank | Sheet aluminum |
| Exhaust | Under water |
| Lower unit | Ball bearing |
| Rope plate | Neptune |
| Model Name: 1938 9B38 Muncie | |
| Original carburetor | Tillotson MS-99A |
| Magneto | Yarian |
| Cylinders | 2 |
| B x S | 2 1/16” x 1 1/2“ |
| HP | 9 @4000 RPM |
| Point gap | 0.020 |
| Sheer pin | 7/32” x 1 1/4“ |
| Oil | 1 pt. SAE-30 per Gal. |
| Tank | Sheet aluminum |
| Exhaust | Under water |
| Lower unit | Ball bearing |
| Rope plate | Muncie |