Several years ago I replaced the 7hp Wis/Robin on my gold dredge with a 10hp Diesel Yanmar clone. Despite being a lot heavier (105lbs dry) I can't say enough about how great that diesel engine is. It has gobs of power and pulls the 400GPM pump and 125 PSI twin piston compressor without breaking a sweat. When I see other prospectors fighting with gas engines not starting, it makes me love that diesel even more. No ignition system or plug to fail, no gummy carb from sitting all winter, just fuel it up with whatever and pull the rope. It will start within 2 pulls with a decent ambient, never more than 4 pulls at freezing.

Ended up putting the old Wisco on a front tine tiller... neighbors love to borrow it.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff