FINAL DAYS for Labor Day Sale Savings! Upgrade to 2nd Day Air for only $2 more*

Mercruiser Water Pump Bases

Refine Parts List
Model

Model

Serial number

Sierra Water Pump Base

Mallory Water Pump Base

#1 Units with plastic flush screw in gear housing2495186-276344118-3421 9-43309
#1 Units (Except MR-ALPHA) w/o flush screw in gear housing2763442-685439218-3417 9-43306
MR/ALPHA I6854393-D59456818-3420 9-43308
Blowout
Save 40% Off.
Your Price: $24.40
Save: $10.31
(29% Off $34.71)
Part # 18-3417 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
Replaces OEM part #
  • MERCURY MARINE 46-57234A1
Your Price: $23.22
Save: $7.74
(25% Off $30.96)
Part # 18-3420 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 40 mins.
Replaces OEM part #
  • MERCURY MARINE 46-44292A3
Your Price: $30.53
Save: $10.85
(26% Off $41.38)
Part # 18-3421 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
Replaces OEM part #
  • MERCURY MARINE 46-48748A1
Fall Sale Price: $23.88
Save: $16.25
(40% Off $40.13)
Part # 9-43309 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 40 mins.
No Reviews  |  Write Review  |  Ask Question
Replaces Original Equipment Manufacturer(OEM):Mercury
Replaces Original Equipment Manufacturer # (OEM #):46-48748A1
Fits Application:Mercruiser units w/ flush plug
Sierra
Average Customer Review for Water Pump Base - 18-3420 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star1988 Mercruiser 3.0 L
by Dawn from Union Gap, Washington on June 15, 2013
Works great!
Was this review helpful?
Ask a question for
Question & Answer Guidelines
This product ships in 1 to 3 business days.
Add to Cart and enter your Postal Code to determine the shipping charges and estimated delivery date.
Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies
End of Summer Savings During our Huge Fall Boatful of Savings Sale - Stock Up Now & Save!