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20 hp onan engine

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Home / Tool Accessories & Parts / 20 hp onan engine refurbished & used for sale | For Sale USA
New voltage regulator - voltage,

New voltage regulator - voltage,

$8.90
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Carburetor for toro wheel - carburetor,

Carburetor for toro wheel - carburetor,

$55.99
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.85
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New stens voltage regulator - stens,

New stens voltage regulator - stens,

$73.71
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Service parts manual set - service,

Service parts manual set - service,

$22.97
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.70
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Onan engine 24 hp - onan,

Onan engine 24 hp - onan,

$15.97
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Carburetor for toro wheel - for,

Carburetor for toro wheel - for,

$58.99
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Carburetor carb fits for - carb,

Carburetor carb fits for - carb,

$24.69
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Carb carburetor for - for, miller

Carb carburetor for - for, miller

$30.49
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Onan engine parts crankshaft - parts,

Onan engine parts crankshaft - parts,

$125.46
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Carburetor carb fits for - carburetor,

Carburetor carb fits for - carburetor,

$25.99
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New voltage regulator - new,

New voltage regulator - new,

$8.73
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2pcs for onan voltage - 2pcs,

2pcs for onan voltage - 2pcs,

$30.99
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$10.24
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John deere 420 - john,

John deere 420 - john,

$24.00
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Onan p216 p218 p220 standard - onan,

Onan p216 p218 p220 standard - onan,

$319.95
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Onan engines service manual - service,

Onan engines service manual - service,

$13.99
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Tune kits fits onan - kits,

Tune kits fits onan - kits,

$34.95
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For john deere 318 420 - 318-420, onan

For john deere 318 420 - 318-420, onan

$8.90
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Sears onan cckb engine - onan, 20

Sears onan cckb engine - onan, 20

$14.20
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Tune kit for onan - kit,

Tune kit for onan - kit,

$46.41
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Gasket set piston rings - set,

Gasket set piston rings - set,

$119.95
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For onan voltage regulator - onan,

For onan voltage regulator - onan,

$9.43
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John deere 420 - john, garden

John deere 420 - john, garden

$45.00
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Onan b43g b48g standard - onan,

Onan b43g b48g standard - onan,

$319.95
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New voltage regulator - voltage,

New voltage regulator - voltage,

$9.95
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.82
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Onan carburetor 146 - 146-0496, for

Onan carburetor 146 - 146-0496, for

$64.99
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For onan voltage regulator - onan,

For onan voltage regulator - onan,

$13.92
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Carburetor carb fits for - carburetor,

Carburetor carb fits for - carburetor,

$29.99
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New ignition coil kit for - ignition,

New ignition coil kit for - ignition,

$33.34
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.66
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Wheel horse 520 tractor - 520-h,

Wheel horse 520 tractor - 520-h,

$99.99
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Carburetor carb fits for - carb,

Carburetor carb fits for - carb,

$26.47
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For john deere - john,

For john deere - john,

$8.64
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Onan rectifier regulator - rectifier,

Onan rectifier regulator - rectifier,

$56.69
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.74
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John deere ctm2 component - john,

John deere ctm2 component - john,

$49.95
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146 0496 carburetor for - 146-0496,

146 0496 carburetor for - 146-0496,

$89.10
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John deere 24hp onan - 16, 20

John deere 24hp onan - 16, 20

$45.00
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Carburetor carb fits for - carb,

Carburetor carb fits for - carb,

$31.39
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John deere 420 garden tractor - john,

John deere 420 garden tractor - john,

$35.00
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Regulator for - of, 2)

Regulator for - of, 2)

$19.99
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Onan b43 b48 standard - onan,

Onan b43 b48 standard - onan,

$319.95
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020 oversize rebuild piston - rebuild,

020 oversize rebuild piston - rebuild,

$359.95
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John deere 420 garden tractor - deere,

John deere 420 garden tractor - deere,

$8.99
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Tune kits fits - onan, b48

Tune kits fits - onan, b48

$34.95
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Wheel horse 520 onan - onan, b48

Wheel horse 520 onan - onan, b48

$124.99
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Onan engine parts - onan,

Onan engine parts - onan,

$125.46
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New voltage regulator - voltage,

New voltage regulator - voltage,

$16.14
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Voltage regulator rectifier - regulator,

Voltage regulator rectifier - regulator,

$8.73
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Wheel horse 520 tractor - horse, 520-h

Wheel horse 520 tractor - horse, 520-h

$94.99
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Engine maintenance filter kit - maintenance,

Engine maintenance filter kit - maintenance,

$44.99
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Govenor spring fits onan - fits,

Govenor spring fits onan - fits,

$19.95
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Carburetor 146 0496 for miller - for,

Carburetor 146 0496 for miller - for,

$33.89
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Wheel horse 520 - wheel, 520-h

Wheel horse 520 - wheel, 520-h

$60.72
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Onan valve caps part - 2,

Onan valve caps part - 2,

$8.95
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For john deere onan b - for,

For john deere onan b - for,

$9.50
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Standard rebuild piston kits - rebuild,

Standard rebuild piston kits - rebuild,

$359.95
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Fit for onan voltage regulator - onan,

Fit for onan voltage regulator - onan,

$8.78
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P216 p218 p220 b43 b48 - b43, .010"

P216 p218 p220 b43 b48 - b43, .010"

$199.95
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.81
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Piston rings fits - 2,

Piston rings fits - 2,

$159.95
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Spark plug fits onan 20hp - plug,

Spark plug fits onan 20hp - plug,

$9.44
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Carburetor for miller - miller, onan

Carburetor for miller - miller, onan

$35.99
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Kit for john deere - for,

Kit for john deere - for,

$9.61
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Paper air filter for - paper, 16

Paper air filter for - paper, 16

$19.46
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Piston rings fits onan - 2,

Piston rings fits onan - 2,

$39.95
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.86
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Federal mogul 2570p engine - federal,

Federal mogul 2570p engine - federal,

$49.99
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John deere toro onan - onan, 24hp

John deere toro onan - onan, 24hp

$35.00
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Tune service kit fits onan - service,

Tune service kit fits onan - service,

$32.99
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New genuine onan 515 - onan, 515-0284

New genuine onan 515 - onan, 515-0284

$13.84
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Voltage regulator for transpo - regulator,

Voltage regulator for transpo - regulator,

$12.99
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2pcs for onan - for, voltage

2pcs for onan - for, voltage

$14.00
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Pcs voltage regulator - 2,

Pcs voltage regulator - 2,

$15.95
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2pcs for onan - for, voltage

2pcs for onan - for, voltage

$15.30
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Kits for onan voltage - kits,

Kits for onan voltage - kits,

$8.69
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Carburetor for miller onan - miller,

Carburetor for miller onan - miller,

$31.79
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Voltage regulator rectifier - voltage,

Voltage regulator rectifier - voltage,

$8.59
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Carburetor for miller onan - carburetor,

Carburetor for miller onan - carburetor,

$49.08
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New isavetractors carburetor - new,

New isavetractors carburetor - new,

$19.95
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Carburetor carb fits - carb,

Carburetor carb fits - carb,

$25.99
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Onan engines service manual - engines,

Onan engines service manual - engines,

$14.99
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Ignition coil kit for - ignition,

Ignition coil kit for - ignition,

$36.69
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Onan p216 p218 - onan,

Onan p216 p218 - onan,

$319.95
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Carburetor carb fits for - carburetor,

Carburetor carb fits for - carburetor,

$29.99
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New isavetractors carburetor - isavetractors,

New isavetractors carburetor - isavetractors,

$19.95
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For miller onan - miller, 20hp

For miller onan - miller, 20hp

$30.42
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Gasket set piston rings fits - set,

Gasket set piston rings fits - set,

$119.95
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New onan 515 0284 - 2, flywheel

New onan 515 0284 - 2, flywheel

$38.95
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Carburetor carb fits - fits, for

Carburetor carb fits - fits, for

$29.99
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Tune kit for onan - kit,

Tune kit for onan - kit,

$60.99
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New voltage regulator - new,

New voltage regulator - new,

$69.99
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For miller onan p126g - p126g, p128g

For miller onan p126g - p126g, p128g

$36.18
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📊96 listings · from $8.59 · avg $56.07
⚠️ These listings were last updated more than 8 days ago. Search for fresh listings

Browse 96 20 hp onan engine listings currently in our index. Prices range from $8.59 to $359.95, with an average of $56.07. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about 20 hp onan engine →

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Whether you are looking for a brand-new or second-hand 20 hp onan engine, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at $8.59, while premium listings can reach $359.95 — giving you a wide budget spread to work with. The average price of $56.07 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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