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Water Pump Impeller Kit w/Housing for Mercury Mariner 13.5-25HP 4-Stroke
✅ In stock
⭐ Lowest price we've tracked
B
Grade
Analysis Confidence
73%
🏷️ Price includes Coupon savings
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 17, 2026 11:28 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
👍 Good Deal- 👍Verdict: Good Deal. Solid value. Price is noticeably below the recent average.
- 💰At 16% off its standard going rate, this offer delivers clear value for the money.
- 📉Our analysis places this at the most competitive price point we have ever tracked for this product — an exceptional moment to buy.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
17.98/28
Recent Value
6.22/22
Market Standing
15.38/20
Deal Strength
20/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
FREPURDO
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Complete Pump Kit WITH Housing (Not Impeller-Only, Not 18-3215 confusion) Direct aftermarket replacement for Mercury/Mariner lower-unit pump service kits. Replaces 99157T2, 46-99157T2, 46-99157A2, 46-85098A2, 85098A2 and crosses Sierra 18-3320, GLM 12014, Mallory 9-48300. Kit includes neoprene impeller 47-85089-3, SS/ABS housing 99157A02, face plate 85083, gasket 993261, wear plate, woodruff key 8M0032838, O-rings 69202 + seals 85090001, 4× insulators 85095, washers. Match old housing stamp before ordering—this is the WITH-HOUSING version (99157T2); impeller-only packs omit the cup/housing.
✓For Mercury / Mariner 4-Stroke 13.5-15HP BigFoot & 2-Stroke 18-25HP Crossflow Engineered for 4-stroke 13.5HP International, 15HP BigFoot 323cc (1998+) and 2-stroke 18/18XD, 20/20XD, 25/25XD, 25 Sea Pro/Marathon/Super 15 (1984-2005 window). (Exact model-code/S/N — 15 BigFoot 0G590000+, 18XD 5837437+, 25XD 5705532+, 25 3-cyl 0E268781
✓13.5-25HP Family Only — NOT 9.9 Non-BigFoot, NOT Force 25, NOT V6 Critical: 99157T2 fits the 13.5-25HP 4-stroke BigFoot + 18-25HP 2-stroke crossflow lower unit. It does NOT fit 9.9HP non-BigFoot (uses different pump), Force 25 (different gasket stack), or V6 85-300HP. Verify your engine decal reads 13.5/15/18/20/25 HP and confirms BigFoot on 4-stroke 15HP 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/ABS housing, and fresh gaskets restore 2-4 GPM cooling flow. Grease the shaft lightly and clock vanes clockwise on install.
✓Lower-Unit Pull, 25-Minute Service Shift to neutral, drop lower unit (4× 7/16" mid-section bolts + trim tab/anode), unstack old housing/plate/gaskets, seat woodruff key, drop impeller on shaft (vanes bend clockwise), stack new gaskets per diagram, torque housing bolts in cross pattern, 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.
⚙️ Specifications
Brand
FREPURDO
Material
Metal
Item Weight
11 pounds
Vehicle Service Type
Mercury Marine 13.5HP, 15HP, 18HP, 25HP 4-stroke outboard engines produced between 1984 and 2005
Weight Class
Light
Manufacturer
FREPURDO
OEM Part Number
46-99157T2, 46-99157A2, 99157A2, 46-85098A2, 85098A2
Automotive Fit Type
Vehicle Specific Fit
Brand Name
FREPURDO
Model Number
46-99157T2
Manufacturer Part Number
46-99157T2
