Mercruiser Water Pump 684MC - $50 (park street)

google map

condition: new

make / manufacturer: Mercruiser

model name / number: 684MC

QR Code Link to This Post

Mercruiser Marine GM Sterndrive Water Circulation Pump 684MC / 18-684M MerCruiser 8M0113734 GM Small Block Circulating Water Pump

Brand new water pump for GM V6 and V8 small block marine engines with stamped steel or composite timing covers.
Includes pump mounting gaskets
Pump is bi-directional

Compatible with the Following: 1963-2014 Mercruiser, 1973 & later Penta, 1968-98 OMC, 4.3L, 5.0L, 5.7L V6/V8 Engines, Chrysler, Indmar, and Pleasurecraft small block cooling systems - 140-200 Hp | V6, 155-205 Hp | V8, 230-260 Hp small block GM & MIE engines.

Replaces the following:
Crusader RA057027, Indmar 551045 55-1045, Mallory 9-42606, Marine Power 8302138, MerCruiser 17437 8503991 46-8M0113734 M0113734, OMC 3853850 8503991, Sierra 18-3583 18-3599 18-3599-1 18-3599-2, Volvo Penta 3853850
and part numbers: 878341 811841 FI1101208 18-684M
*This pump does not replace the engine water circulating pump used on 2007 and newer V6 4.3L engines without water bypass hole

post id: 7947039311

posted: 2026-07-13 21:11

updated: 2026-09-16 07:34

♥ best of ^[?]

reading

writing

saving

searching

refresh the page.

Mercruiser Water Pump 684MC - boat parts - by owner - marine sale -...

Mercruiser Marine GM Sterndrive Water Circulation Pump 684MC / 18-684M MerCruiser 8M0113734 GM Small Block Circulating Water Pump Brand new water pump for GM V6 and V8 small block marine engines...