Honda GX390 Engine

• 17210-ZE3-505 — Honda GX390, confirmed identical on VIN prefixes GCANK, GCAKT, GCBCT, GCAA, GCAET and GCAHH

  Independently confirmed the SAME element on six of GX390's at least ten VIN prefixes (GCANK and GCAHH via partstree.com; GCAKT, GCBCT, GCAA and GCAET via jackssmallengines.com), so left unscoped by prefix rather than pinned to just one - the same pattern GX200's spark plug already shipped under in seed-008. Remaining prefixes (GDAF, GCBJK, GCBHK, GCBDT) not checked this pass.

  Source: Honda GX390 U1 QAE2 (GCANK) - Honda Engine, Made in Japan (SN: GCANK-1000001 - GCANK-9999999) AIR CLEANER (1) Diagrams & Parts List | PartsTree — "AIR CLEANER (1) Parts" list, item 2: "2 Honda 17210-ZE3-010 ... Superseded to Honda 17210-ZE3-505 ... 2 Honda 17210-ZE3-505 ... ELEMENT, AIR CLEANER". Identical part number independently re-confirmed on jackssmallengines.com for GCAKT, GCBCT, GCAA and GCAET model pages, and on partstree.com for GCAHH.

• 16100-Z1C-V01 — VIN prefix GCAKT

  The same BE85Q A carburetor was also claimed for GX390T1 QAA2 (GCAET), but that citation's source page could not be independently verified (Cloudflare CAPTCHA on every re-fetch attempt) and is not shipped.

  Source: Honda Engines GX390UT1 QAA2 ENGINE, THA, VIN# GCAKT-1000001 TO GCAKT-9999999 Parts Diagram for CARBURETOR (1) — CARBURETOR (1) parts table, item 9: "9 16100Z1CV01 CARBURETOR BE85Q A $42.44".
• 16100-Z5T-901 — VIN prefix GCBCT

  Superseded in later production by carburetor BEC0A A (16100-Z5T-922) from Engine SN 3000001 - see paired row below.

  Source: Honda GX390 UT2 QAE2 (GCBCT) - Honda Engine, Made in Thailand (SN: GCBCT-1000001 - GCBCT-9999999) CARBURETOR (1) Diagrams & Parts List | PartsTree — "CARBURETOR (1) Parts" list, item 9: "9 Honda 16100-Z5T-901 ... CARBURETOR ASSY. (BE88A A) Use up to Engine SN 2999999."
• 16100-Z5T-922 — VIN prefix GCBCT
  Source: Honda GX390 UT2 QAE2 (GCBCT) - Honda Engine, Made in Thailand (SN: GCBCT-1000001 - GCBCT-9999999) CARBURETOR (1) Diagrams & Parts List | PartsTree — "CARBURETOR (1) Parts" list, item 9: "9 Honda 16100-Z5T-922 ... CARBURETOR ASSY. (BEC0A A) Use from Engine SN 3000001."
• 16100-ZF6-V01 — VIN prefix GCANK

  The same BE85B B carburetor was also claimed for GX390K1 QA2 (GCAA), but that citation's source page could not be independently verified (Cloudflare CAPTCHA on every re-fetch attempt) and is not shipped.

  Source: Honda GX390 U1 QAE2 (GCANK) - Honda Engine, Made in Japan (SN: GCANK-1000001 - GCANK-9999999) CARBURETOR (1) Diagrams & Parts List | PartsTree — "CARBURETOR (1) Parts" list, item 9: "9 Honda 16100-ZF6-V01 ... CARBURETOR ASSY. (BE85B B)".
• 16100-Z7E-801 — VIN prefix GCAHH
  Source: Honda GX390 UH1 QAA2 (GCAHH) - Honda Engine, Made in China (SN: GCAHH-0000001 - GCAHH-9999999) CARBURETOR (1) Diagrams & Parts List | PartsTree — "CARBURETOR (1) Parts" list, item 9: "9 Honda 16100-Z7E-801 ... CARBURETOR ASSY. (BE85T A/B)".

This model was built with more than one part here — check your serial number or engine TYPE against the options below before ordering.

• 30500-Z1C-023 — VIN prefix GCAKT, VIN prefix GCAET, VIN prefix GCANK

  Type-specific: GX390 engines in the same GCAA VIN prefix but a different type code (K1 VWA2) use a different coil - see that row below. Always confirm the exact type code, not just the VIN prefix.

  Same part number as GCAKT (also 30500-Z1C-023), coincidentally, but this row is independently sourced from GCAET's own diagram and carries its own serial cutoff.

  Source: Honda Engines GX390UT1 QAA2 ENGINE, THA, VIN# GCAKT-1000001 TO GCAKT-9999999 Parts Diagram for IGNITION COIL (1) — IGNITION COIL (1) parts table: "30500Z1C023 Ignition Coil Assembly $55.44".
• 30500-Z5T-003 — VIN prefix GCBCT
  Source: Honda GX390 UT2 QAE2 (GCBCT) - Honda Engine, Made in Thailand (SN: GCBCT-1000001 - GCBCT-9999999) IGNITION COIL (1) Diagrams & Parts List | PartsTree — "IGNITION COIL (1) Parts" list, item 28: "28 Honda 30500-Z5T-003 ... COIL ASSY., IGNITION Superseded to Honda 30500-Z5T-005".
• 30500-ZF6-W02 — VIN prefix GCAA

  Confirms ignition-coil fitment on GX390 varies by TYPE code, not just VIN prefix - the same GCAA-2000001/3399999 range serves at least two different engines.

  Source: Honda GX390 K1 VWA2 (GCAA) - Honda Engine, Made in Japan (SN: GCAA-2000001 - GCAA-3399999) IGNITION COIL (1) Diagrams & Parts List | PartsTree — "IGNITION COIL (1) Parts" list, item 1: "1 Honda 30500-ZF6-W02 ... COIL ASSY., IGNITION (Honda Code 7032428)."
• 30500-Z7E-003 — VIN prefix GCAHH
  Source: Honda GX390 UH1 QAA2 (GCAHH) - Honda Engine, Made in China (SN: GCAHH-0000001 - GCAHH-9999999) IGNITION COIL Diagrams & Parts List | PartsTree — "IGNITION COIL Parts" list, item 1: "1 Honda 30500-Z7E-003 ... COIL ASSY., IGNITION Superseded to Honda 30100-Z7E-305".

This model was built with more than one part here — check your serial number or engine TYPE against the options below before ordering.

• 98079-56846 — Honda GX390, confirmed on VIN prefixes GCAKT, GCANK, GCBCT and GCAHH (standard, no "Optional" tag); also shown plainly on GCAET

  Denso cross equivalent on the same diagrams: 98079-56855 (W20EPR-U). NGK BPR5ES (98079-55846) is Honda's optional colder-range alternate for extended full-load use - shipped as a separate row below.

  Source: Honda GX390 UT1 QAA2 (GCAKT) - Honda Engine, Made in Thailand (SN: GCAKT-1000001 - GCAKT-9999999) CYLINDER HEAD Diagrams & Parts List | PartsTree — "CYLINDER HEAD Parts" list, item 15: "15 Honda 98079-56846 ... SPARK PLUG (BPR6ES) (NGK) (Honda Code 1441112)". Same entry (no Optional tag) independently confirmed on partstree.com for GCANK, GCBCT, GCAHH and on jackssmallengines.com for GCAET.
• 98079-55846 — Honda GX390, confirmed as the Optional colder-range plug on VIN prefixes GCAKT, GCBCT and GCAHH; the only plug shown for GCAA and GCBCT on jackssmallengines.com

  Tagged "(Optional)" on partstree.com's GCAKT, GCBCT and GCAHH diagrams (colder heat-range alternate to the standard BPR6ES, for extended full-load operation). Denso cross equivalent: 98079-55855 (W16EPR-U).

  Source: Honda GX390 UT1 QAA2 (GCAKT) - Honda Engine, Made in Thailand (SN: GCAKT-1000001 - GCAKT-9999999) CYLINDER HEAD Diagrams & Parts List | PartsTree — "CYLINDER HEAD Parts" list, item 15: "15 Honda 98079-55846 ... SPARK PLUG (BPR5ES) (NGK) (Honda Code 1672443). (Optional)."

This model was built with more than one part here — check your serial number or engine TYPE against the options below before ordering.