This is the largest displacement per HP I've seen among any of these modern industrial engines.Ĭompare to: Predator 670cc horiz shaft: 30.46. Manufacturer (Loncin) claimed HP: 24.1 HP net = 29.4 cc/HP.ģ June edit/correction: Factory clams 17.16HP, so 41.26 cc/HP. The Exmark video shows a nylon gear on the camshaft, but the Loncin web site says it has a "metal cam and forged crankshaft."ĬC/rated HP (higher #= more conservative): 32.18 cc/hp for HF claim of 22 HP. I didn't notice the intake manifold on the HF engine in the store. The Exmark engine shows a 2-barrel carb (one per jug) with an aluminum intake manifold. The Exmark video also says cast iron sleeves, 5 bolt head, and a nice, wide head gasket. (HF also claims there are ball bearings in their 670cc engine, Hot Wings didn't get any in the 670 he bought). Looking at dimensioned drawing of the shaft (p 27 of manual), the crankshaft might be 45mm in diameterĬonstruction: HF literature says "the vertical shaft is ball-bearing mounted" and that the cylinders are cast iron. The Vanguard 627cc (claimed 22HP) weighs 77 lbs out of the box, but there's no muffler in that weight. I did notice that the vert 708cc engine had cast AL valve covers, the Predator 670cc engine had steel covers. The muffler was 9.75 lbs) The Vanguard 810cc engine weighs about the same out of the box (91 lbs), but a muffler definitely isn't included in that weight (but a heavy canister air cleaner is). ( Hot Wings actually weighed one before examining it: 109.25 lbs. The horiz Predator 670cc engine is listed as 110.2 lbs. Weight out of the box: 92.6 lbs (includes the muffler?). They claim 24.1HP for the 803cc engine.Ĭlaimed max torque: 32.5 ft/lbs at 2500 RPM (3 June edit: Factory claims =35.03 lb/ft torque at 2400 RPM)ĭisplacement: 708cc (77mm bore x 76mm stroke)Ĭompression ratio: 8.7:1 (HF 670cc listed as 8.2:1. This 18KW does not match the dyno chart, however.ģ June edit/correction: The manufacturer claims 12.8KW (17.16 HP) at 3600 RPM for the 708cc engine. Note: The manufacturer claims 18 KW net power on their product page, so 24.1 HP. See Exmark video for details of governor). 708cc engine page is here: Ĭlaimed HP: 22 HP (RPM not listed. Notice the layout of the engine case on the PTO side is identical to the Predator 708cc engine.ģ June edit/correction: Above link is to the Loncin 803cc engine specs.
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