Compare/AMF Harley-Davidson 398 vs AMF Ski-Daddler Mark VI 640
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AMF Harley-Davidson 398 vs AMF Ski-Daddler Mark VI 640

Verdict: AMF Harley-Davidson 398 vs AMF Ski-Daddler Mark VI 640

The AMF Harley-Davidson 398 and the AMF Ski-Daddler Mark VI 640 are both snowmobiles — here is how they stack up on the figures that matter. AMF Ski-Daddler Mark VI 640 leads on rated power with 36 hp against 30 hp. AMF Harley-Davidson 398 is the lighter machine (180 kg vs 181 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. AMF Ski-Daddler Mark VI 640 holds more fuel (22.7 L vs 20.8 L) for longer stints between fills. AMF Harley-Davidson 398 is the newer design (1971 vs 1970). In short: choose the AMF Ski-Daddler Mark VI 640 for outright pulling power, or the AMF Harley-Davidson 398 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Fit & specs
AMF Harley-Davidson 398 Snowmobile
AMF
62
Fit score
Best match
Clear
AMF Ski-Daddler Mark VI 640 Snowmobile
AMF
62
Fit score
Best match
Clear
Rated power
30 hp
36 hp
Confidence
40%
40%
Guide price
Overview
Manufacturer
AMFReference
AMFReference
air-cooled horizontal-shaft inlineReference
air-cooled horizontal-shaft inlineReference
Suspension
bogie wheelReference
bogie wheelReference
Engine
Fuel tank
20.8 LReference
22.7 LReference
Displacement
24.29 ciReference
38.69 ciReference
Bore/Stroke
65 x 60 mmReference
77 x 68 mmReference
Power
22.4 kWReference
26.8 kWReference
Fuel system
Tillotson carburetorReference
Cooling system
fanReference
Rated RPM
6000Reference
Starter type
manual recoilReference
Dimensions
Weight
180 kgReference
181 kgReference
Length
236 cmReference
250 cmReference
Width
91 cmReference
85 cmReference
Track width
45 cmReference
38 cmReference
Track length on ground
99 cmReference
Track area on ground
0.5 m²Reference
Height
109 cmReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.

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