✓Complete Pump Kit WITH Housing (Not Impeller-Only, Not 18-3381) Direct aftermarket replacement for OMC/Johnson/Evinrude lower-unit pump service kits. Replaces 393630, 0393630, 393509, 391636 and crosses Sierra 18-3382, GLM 12960, Mallory 9-48300, CEF 500350. Kit includes neoprene impeller 395289, housing 393632, pump cup 328751, wear plate 328755, gasket 325537, brass bushing 328754, key 330619, O-rings 311338/554545/301877, seal 328753, grommet 302497, 6× bolts 324960/318452. Match old housing stamp before ordering—this is the WITH-HOUSING version (18-3382); impeller-only 18-3381 will not include the cup/housing.
✓For Johnson / Evinrude / OMC 2-Stroke 20-35HP (Crossflow, Thru-Prop) Engineered for 20HP (1985+), 25HP (1985+, incl. 1998-2001 Commercial), 30HP (1980-1982 & 2-cyl 1983+), 35HP (1980-1982 & 2-cyl 1983+) 2-stroke outboards. (Exact model-code/year — E20ELCRC, E25RC, E30RLERC, E35RWL etc.
✓20-35HP 2-Stroke Only — NOT 9.9/15HP, NOT E-TEC, NOT V4/V6 Critical: 393630 fits the 2-stroke 20-35HP crossflow/thru-prop lower unit. It does NOT fit 9.9/15HP (uses 397749 family), E-TEC 25/30/35HP (different pump body), or V4/V6 85-300HP. Verify your engine decal reads 20 / 25 / 30 / 35 HP 2-STROKE before ordering.
✓Fixes Weak Tell-Tale, Overheat Alarm & Milky Gear Lube Resolves weak tell-tale stream, sudden overheat buzzer, melted impeller chunks in the housing, and water seeping past the pump seal into gearcase (milky lube). New neoprene impeller, SS316 wear face, and fresh gaskets restore 2-4 GPM cooling flow. Grease the shaft lightly and clock vanes clockwise on install.
✓Lower-Unit Pull, 20-Minute Service Drop lower unit (4× 7/16" mid-section bolts + anode), unstack old housing/cup/plate/gaskets, seat woodruff key, drop impeller on shaft (vanes bend clockwise), stack new gaskets per diagram, torque housing bolts evenly, rehang lower unit, refill gear lube. Run on flushing muffs 3 min to confirm tell-tale before launch. Salt-use interval: every 2 years or 200 hrs.