397839 Mechanical Fuel Pump Assembly

Mechanical Fuel Pump — Compatible with select Johnson Evinrude 9.9 / 15 HP 2-Stroke 1981–1992

Which pump is this?

This is Johnson / Evinrude 397839 (catalog 0397839), a 3-nipple external-pulse mechanical diaphragm pump. Folder / predecessor stamp 397274 (0397274) is the same family, along with 395091, 391638, 388681 and 386978. Compatible with the two factory groups in the table: 9.9 HP 1981–1992 and 15 HP 1981–1992. Aftermarket pages that add 6 / 8 HP are wider than this workbook — those horsepowers are not promised here. 1993-and-later 9.9 / 10 / 15 HP 2-stroke uses 438562 (24FP096, cross-ref 18-7351). This page is 18-7350 / 9-35350 / 8M6010285, not 8M6010286. It is not the larger 3-nipple 438559 / 438555 family, and not 20–140 HP 438556.

Signs yours is due

• 9.9 or 15 HP 2-stroke 1981–1992 cranks, fires, then dies — small 3-nipple pulse pump tired.
• Fuel weep at three nipples on a pre-1993 9.9 / 15 cowl; stamp 397839 or 397274.
• You already know 1993-up 9.9/15 takes 438562 — if the year is 1993 or later, stop.
• Not a four-stroke 15 HP (24FP095) and not a 6/8 HP promise from a wide catalog line.

Will it fit?

Compatible with Johnson / Evinrude 9.9 HP 1981–1992 and 15 HP 1981–1992 as in the table. Serial is often not listed — match year and the 397839 / 397274 stamp. 1990–92 also has a parallel factory number 0433517 that is not this SKU. 1993 on is 24FP096. Do not order this page for 6 HP or 8 HP from aftermarket ‘6–15 HP’ lines.

Engine horsepower alone does not prove fit. Match the number stamped on the pump you remove to the OEM column.

Every row is from this SKU fitment workbook (2 rows after empty-line filter). Same horsepower name shipped different pumps.

OEM and swap numbers

OEM / predecessor numbers keep the engine-brand column. Aftermarket cross-refs are numbers only.

Wrong part

• NOT 438562 / 18-7351 / 8M6010286 — 1993-and-later 9.9/10/15 (24FP096).
• NOT 6 HP or 8 HP from this factory table (aftermarket wide lines only).
• NOT 438556 (17FP015) and NOT 438559 / 438555 (larger 3-nipple pages).
• NOT rebuild kit 18-7823. This page is the complete pump.

What ships

One complete 3-nipple mechanical fuel-pump assembly (397839 / 397274 family). No rebuild kit, no filter.

Often replaced together

1993-and-later 9.9/10/15 2-stroke is 24FP096. Four-stroke 15 HP is 24FP095. Larger 3-nipple 438559 / 438555 are different SKUs.

Install

Read the year on the cowl first. 1981–1992 9.9/15 with 397839 / 397274 is this page. 1993 on with 438562 is 24FP096. Photograph the three nipples and the pulse hose. Prime, leak-check, idle on muffs. If the stamp is 438562, return this pump.

Frequently Asked Questions

Will this fit my 15 HP Johnson?

2-stroke 15 HP 1981–1992 in the table, yes. 1993–2007 2-stroke 15 HP is 24FP096. Four-stroke 15 HP is 24FP095.

Is 438562 the same?

No. 438562 starts about 1993. This page is the 1981–1992 397839 family.

6 HP or 8 HP?

Not from this factory table. Aftermarket lines that say 6–15 HP are wider than the workbook.

Is 18-7350 this pump?

18-7350 is a cross-ref number for this 397839 family. We list the number only. 18-7351 is 24FP096.

What ships?

One 397839-family pump. Not kit 18-7823.

Please note

Aftermarket fuel pump by GHMarine. Not affiliated with the engine brands named above. «Compatible with», «Replaces», and cross-ref numbers mean this part is built to work like the originals listed — always confirm the stamp on the removed pump, the engine model, and the serial range before you order. This page is the pump only, not a multi-part kit.