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Chainsaw Poulan Pro 42cc Unverified

Poulan Pro · 42cc (PP4218 family) · Yingling farm

Typical intervals

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History

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Specs

Engine42 cc 2-cycle gasoline, occasional-use homeowner saw
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Typical bar18 in (also listed with 16 in on some kits)
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Chain3/8 in low-profile pitch, 0.050 in gauge
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PP4218 bar / chain P/NBar 952044926 · chain 952051548
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Fuel mix (PP4218 manual)40:1 — 3.2 oz synthetic 2-cycle oil per 1 gal unleaded, 89+ octane, max 10% ethanol
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Later PR4218 mix50:1 — 2.6 oz per gallon if the saw or oil bottle says 50:1
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Spark plugChampion RCJ-7Y, gap 0.025 in (0.6 mm); 3/4 in socket; replace yearly
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Bar / chain oilDedicated bar-and-chain oil (or SAE 30). Never waste oil. Thin 5–10% with #1 diesel/kerosene in freeze.
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OilerAutomatic — keep the oil tank full or the bar/chain dies fast
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SafetyInertia chain brake; chain must not move at idle
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Unverified numbers until you match them to this machine.

ItemPart
Spark plug
Gap 0.025 in; NGK BPMR7A on some diagrams
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Champion RCJ-7Y (952030150)
Air filter
PP4218 Type 1/2; AV variants sometimes 530057869 — match the housing
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530057925
Primer bulb
Snap-in
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530047721
Fuel filter (in tank)
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530095646
Fuel line kit (small)
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530069247
Carburetor
Confirm on the carb stamp
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Zama W-26 · 545070601 (replaces 530035590)
18 in bar
OEM; many are NLA — match length/mount
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952044926
18 in chain
3/8 LP, .050; count drive links before ordering
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952051548
2-cycle oil
40:1 unless the saw says 50:1
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ISO-L-EGD / JASO FD synthetic
Bar oil
Not motor oil from the Camry
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Poulan Pro bar and chain oil

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