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18 hp onan engine

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Home / Tool Accessories & Parts / 18 hp onan engine for sale – 96 used, around $22 | For Sale USA
New air filter - new, 8"

New air filter - new, 8"

$13.49
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New voltage regulator - new,

New voltage regulator - new,

$16.61
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New air filter for - new,

New air filter for - new,

$14.25
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Carburetor for onan 18hp - carburetor,

Carburetor for onan 18hp - carburetor,

$36.28
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Service parts manual - manual, for

Service parts manual - manual, for

$22.97
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Onan engine 24 - 18, 20

Onan engine 24 - 18, 20

$15.97
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P216 p218 p220 b43 - p216,

P216 p218 p220 b43 - p216,

$189.95
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Air filter for - filter, 140-1228

Air filter for - filter, 140-1228

$13.57
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Sears fuel pump ss16 - sears,

Sears fuel pump ss16 - sears,

$29.32
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Wheel horse 520 muffler - 520-h,

Wheel horse 520 muffler - 520-h,

$323.37
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New voltage regulator - voltage,

New voltage regulator - voltage,

$9.95
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Onan engines service manual - onan,

Onan engines service manual - onan,

$13.99
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Oem onan b43g - oem, cylinder

Oem onan b43g - oem, cylinder

$82.67
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Carburetor for onan 18hp - for,

Carburetor for onan 18hp - for,

$38.19
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Carburetor for onan 18hp - for,

Carburetor for onan 18hp - for,

$36.28
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Onan engine cckb 3163j - onan, cckb-ms/3163j

Onan engine cckb 3163j - onan, cckb-ms/3163j

$1200.00
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New air filter - filter, for

New air filter - filter, for

$13.81
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Carburetor kit for lincoln - kit,

Carburetor kit for lincoln - kit,

$49.99
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Air filter for - air, onan

Air filter for - air, onan

$14.12
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Wheel horse 520 - horse, 520-h

Wheel horse 520 - horse, 520-h

$99.99
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New air filter for - for, onan

New air filter for - for, onan

$22.23
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Air filter for onan - filter,

Air filter for onan - filter,

$15.06
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Onan engine parts crankshaft - parts, 9

Onan engine parts crankshaft - parts, 9

$125.46
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Onan b43m 16hp b48m 18hp - 16hp,

Onan b43m 16hp b48m 18hp - 16hp,

$16.97
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Air filter for onan - air,

Air filter for onan - air,

$13.81
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New air filter for onan - air,

New air filter for onan - air,

$17.26
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Onan p216 p218 - p218, p220

Onan p216 p218 - p218, p220

$319.95
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New air filter for - new,

New air filter for - new,

$17.26
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John deere ctm2 20 and - deere,

John deere ctm2 20 and - deere,

$48.95
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Air filter for - air,

Air filter for - air,

$14.43
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Carburetor for onan 18hp - carburetor,

Carburetor for onan 18hp - carburetor,

$36.28
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New carburetor 146 0496 for - new,

New carburetor 146 0496 for - new,

$32.99
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Sears suburban onan - suburban,

Sears suburban onan - suburban,

$25.28
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New breaker points - points, &

New breaker points - points, &

$16.19
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Air filter for - filter, onan

Air filter for - filter, onan

$14.97
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New air filter for onan - air,

New air filter for onan - air,

$16.47
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Onan engine parts crankshaft - parts,

Onan engine parts crankshaft - parts,

$125.46
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P216 p218 p220 - p220, b43

P216 p218 p220 - p220, b43

$199.95
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New breaker points - breaker, &

New breaker points - breaker, &

$19.19
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Case 448 garden tractor onan - 448,

Case 448 garden tractor onan - 448,

$14.97
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Case 448 tractor onan - case,

Case 448 tractor onan - case,

$99.99
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Air filter for onan 140 - filter,

Air filter for onan 140 - filter,

$13.56
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New voltage regulator - new,

New voltage regulator - new,

$11.71
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Air filter for onan 140 - air,

Air filter for onan 140 - air,

$13.67
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Wheel horse 518 - horse, 518-h

Wheel horse 518 - horse, 518-h

$16.99
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Standard notched cam bearings - standard,

Standard notched cam bearings - standard,

$49.95
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Air filter for - air,

Air filter for - air,

$14.59
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John deere 316 420 318 - john,

John deere 316 420 318 - john,

$51.79
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New air filter - 8", for

New air filter - 8", for

$15.06
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Air filter for - filter, onan

Air filter for - filter, onan

$14.82
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Two 010 undersized - .010",

Two 010 undersized - .010",

$199.95
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Wheel horse 416 518 520 - wheel, 518-h

Wheel horse 416 518 520 - wheel, 518-h

$114.99
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Air filter for - for, onan

Air filter for - for, onan

$13.90
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John deere 316 - john,

John deere 316 - john,

$163.76
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New air filter for onan - 8",

New air filter for onan - 8",

$14.75
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John deere 316 420 318 - deere, tractor

John deere 316 420 318 - deere, tractor

$58.26
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18hp onan p218g - , p218g-10462c

18hp onan p218g - , p218g-10462c

$34.99
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John deere 316 318 - deere,

John deere 316 318 - deere,

$31.76
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New breaker points condenser - breaker,

New breaker points condenser - breaker,

$46.99
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Air filter for onan - filter,

Air filter for onan - filter,

$14.12
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Case 648 industrial tractor - case,

Case 648 industrial tractor - case,

$14.97
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Air filter for onan - air,

Air filter for onan - air,

$14.43
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John deere 316 420 318 - deere,

John deere 316 420 318 - deere,

$31.76
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Air filter for - air, onan

Air filter for - air, onan

$14.75
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Air filter for - for, onan

Air filter for - for, onan

$14.75
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Air filter for onan - for,

Air filter for onan - for,

$14.59
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Wheel horse 518 tractor - horse,

Wheel horse 518 tractor - horse,

$18.99
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Wheel horse 518 tractor onan - horse,

Wheel horse 518 tractor onan - horse,

$49.99
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New air filter for - filter, onan

New air filter for - filter, onan

$15.69
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Carburetor carb fits - carburetor,

Carburetor carb fits - carburetor,

$24.69
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Sears suburban onan bg - sears, bg-ms

Sears suburban onan bg - sears, bg-ms

$13.63
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Air filter for onan 140 - filter,

Air filter for onan 140 - filter,

$14.15
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Air filter for onan - for,

Air filter for onan - for,

$14.50
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Air filter for onan 140 - air,

Air filter for onan 140 - air,

$15.69
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Carburetor for john - john, deere

Carburetor for john - john, deere

$68.99
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Wheel horse 518 tractor onan - tractor,

Wheel horse 518 tractor onan - tractor,

$32.99
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Wheel horse 520 - horse, 520-hc

Wheel horse 520 - horse, 520-hc

$250.00
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Air filter for onan - 8",

Air filter for onan - 8",

$14.43
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Gasket set piston - set, rings

Gasket set piston - set, rings

$119.95
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For onan 18hp - for, p218g

For onan 18hp - for, p218g

$30.29
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John deere 316 420 318 - deere,

John deere 316 420 318 - deere,

$64.74
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Air filter for onan - air,

Air filter for onan - air,

$14.91
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Air filter for onan - air,

Air filter for onan - air,

$14.13
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Wheel horse 518 tractor - 518-h, onan

Wheel horse 518 tractor - 518-h, onan

$49.99
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New air filter for - new,

New air filter for - new,

$14.59
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John deere 316 - deere(jd42-e51), 318

John deere 316 - deere(jd42-e51), 318

$49.99
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Onan engines service manual - service,

Onan engines service manual - service,

$14.99
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Carburetor for onan - carburetor,

Carburetor for onan - carburetor,

$28.99
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Onan 16hp twin - 16hp,

Onan 16hp twin - 16hp,

$50.00
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Onan b43 b48 standard - b43,

Onan b43 b48 standard - b43,

$319.95
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Air filter for onan - air, 140-2628

Air filter for onan - air, 140-2628

$14.59
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New air filter for onan - new,

New air filter for onan - new,

$15.06
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For onan 16hp 18hp - onan,

For onan 16hp 18hp - onan,

$26.24
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Onan b43g 18hp blower - 18hp,

Onan b43g 18hp blower - 18hp,

$64.99
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Carburetor for onan 18hp - for, 16-18hp

Carburetor for onan 18hp - for, 16-18hp

$32.79
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Carburetor for onan - onan, 16-18hp

Carburetor for onan - onan, 16-18hp

$38.71
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📊96 listings · from $9.95 · avg $61.95
⚠️ These listings were last updated more than 8 days ago. Search for fresh listings

Browse 96 18 hp onan engine listings currently in our index. Prices range from $9.95 to $1200, with an average of $61.95. 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 18 hp onan engine →

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Everything you need to know about 18 hp onan engine

Whether you are looking for a brand-new or second-hand 18 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 $9.95, while premium listings can reach $1200 — giving you a wide budget spread to work with. The average price of $61.95 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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