Mercruiser Water Pump Impellers 18-3087 Application

Model Beg- S/N End- S/N Model Beg- S/N End- S/N
200 6218462 UP 320 GM (EFI) Bravo B157603 UP
200/2.5 (GM)(1) B525982 UP 325 GM 3042730 UP
215 Ford 3040411 UP 330 GM 4623115 UP
225 Ford 3385721 UP 340/7.4L GM (IB) 5889914 UP
225 S Ford 3385721 UP 340 GM W/BW 6083145 UP
228 GM 4765100 5170008 350 GM 3780450 UP
228 GM (2) 5170009 6218461 350 GM (Magnum) B525982 UP
228 6218462 UP 370 TRS GM 6721528 UP
230 GM (IB) 5907058 UP 420/425 GM A398941 UP
230 6218462 UP 454 Mag Bravo (GM) B721206 UP
230/5.0L GM (IB) B522506 UP 465 C849992 UP
230/5.0L-LX (GM) B525982 UP 500 C577254 UP
233 Ford (IB) 4173000 UP 502 Magnum Bravo C878221 UP
255 Ford 3258728 UP 525 D456000 UP
255 GM 4175500 UP 575 A677429 UP
260 GM (2) 4908850 6218461 898/198 GM (IB) 4762210 6218461
260 GM (IB) 5907058 UP 898 6218462 UP
260 6218462 UP 5.7L GM (SKI) A338553 UP
260/5.7L GM (IB) B522506 UP 5.7L Bravo - GM B525982 UP
260/5.7L (GM) B525982 UP 7.4L Bravo GM B771113 UP
280 GM 4176250 UP 7.4L w/Hurth C391564 UP
300 TR (GM) 6668677 UP 8.2L w/Hurth IB (GM) C878221 UP


Mercruiser Water Pump Impeller Kits Application

Model Serial No. Complete Water Pump Kit Upper Pump Housing Upper Pump Kit Water Pump Base Impeller Repair Kit Impeller
#1Unitswithplastivflush screw in gear housing 2495186-2763441 18-3321 18-3116 18-3517 18-3421 18-3217 18-3017
#1Units(exceptMR/Alpha) w/o flush screw in gear hsg 2763442-6854392 18-3317(1) 18-3116 18-3517 18-3417(1) 18-3217 18-3017
MR/Alpha I 6854393-D594568 18-3320 18-3116 18-3517 18-3420 18-3217 18-3017
Alpha I -Generation II D494569 Above         18-3214 18-3056
(1) Models which have been retro-fitted with an Alpha style lower unit (no preload  pin in top of driveshaft) must use Alpha style parts (18-3320 and 18-3420)