Engines

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About

  • 2-strokes have 3-9 hp at 50 cc. See cc to hp - [1]
  • Ex - Stihl MS 660 is 7 hp and 91 cc
  • 1 hp for $25 for simple small engines.
  • 1000 hp are $25k for the largest tractor in the world.

50 cc 2 stroke

  • Only 1.3 hp? $50 about. [2]

Large

  • JD 9 series engine, 14.l, 450 hp - around $30k [3]

50 cc with Electric Start

3hp

6.5 hp

  • For the $/hp ratio, the 212 cc range appears slightly better than the 16 hp range. 420 cc for 2 - cheaper than any 440 cc.
  • Check.pngPredator HF $150 212 cc - [6]. Performance review is solid [7]
  • Check.pngGX160 clone Walmart $134 [8]. Elect. start $70 more [9]
  • Check.pngWalmart $144 7.5 hp 212 cc Electric Start [10]
  • With electric start - 212 cc - $170 [11]
  • Honda GX160 clone - $160 - 6.5 hp [12]

20 hp Range

Selection

OSE's 2020 choice for an engine is the Poulan 19 hp x4 for 74 hp - [13]

Gas

The threshold for relatively inexpensive engines is 19 hp.

  • 27 hp - $980 - $36/hp - [14]. And needs muffler.
  • 24 hp - $870 - $36/hp [15]
  • 22 hp - Briggs - $29/hp - [16]
  • 20 hp - Kohler $700 - $35/hp + muffler - [17]
  • 19 hp Poulan - - $20.5/hp - $390 - [18]
  • 16 hp - $350 - Poulan - [19]. No gas pump, gravity feed gas. But, doesn't come with muffler. Check.png Has 15A charging. Muffler - [20]
  • Check.png16hp - $370 - Duromax, $23/hp - [21]
  • 7 hp - $159 - $22/hp - but no electric start - [22]
  • 18hp Duromax $18/hp - has muffler, but not charging Cross.png- such as for a fan - [23]

420 cc

Diesel

  • 30 hp Kubota $5000 - $166/hp [27]
  • 33 hp Kubota - $6500 [28]
  • 65 HP - $6300 - $100/hp [29]
  • 200 hp - $55/HP - $11k - Cummins - [30]
  • 360 HP Mack used - $10/HP - $3600
  • 300 hp [31] $7500 [32]

Considerations

  • Until an open source engine becomes a reality, engine repair is expensive. $50/hr, easily comes to the new engine price for the $300 gas engine. This indicates that small engines are essentially disposable goods.
  • For the large diesel engine, parts are expensive.
  • Until the advent of the open source diesel engine, engine costs remain 10x as high as they should be.
  • Until the OS engine, disposable engines are a suboptimal but acceptable strategy to keep costs of engine systems low.
  • It is an immediate priority of OSE to develop open source small engines, $11B market (see Market Size) and larger ones are more like 200 billion

Engine Links

  1. 500 &U 1000 hour lifetime for small engines - [33]
  2. 2000-4000 year life of car engines [34] - 150k miles
  3. Tractor engines - 5-10k hours [35]
  4. Pellet-fired stirling engine buggy - see PDF file
  5. Several links to various engine types including Sterling, Wankel, Steam, etc. [36].

Types

Rotary