The Marine Knowledge Network
Field write-ups from real jobs - what broke, what fixed it, torque specs and part numbers included. Ask it a question; specs answer inline.
21 articles for “water pump”
Bilge Pump Setup Done Right
... water line, adhesive-lined heat shrink on every splice, fuse sized per the pump ...
Outboard Fuel Pump Diagnosis: Lift Pumps, VSTs, and Primer Bulbs
... O-rings, primer bulb, water separator seal). ## Mechanical lift pumps (diaphragm) Driven by crankcase ...
MerCruiser Raw Water Impeller: Alpha vs Bravo Differences
... They are not: - **Alpha (One/Gen II):** the raw water pump lives **inside the ...
Sea-Doo Jet Pump Wear Ring Inspection and Replacement
... the pump bearings/oil while apart — gray milky pump oil means water intrusion via ...
Spring Recommissioning Checklist: Outboard Boats
... type and gap. - Inspect the impeller/water pump if it's due (2 seasons ...
Sea-Doo Winterization Step by Step
... pump while it's convenient. ## Common mistakes - Flushing with the engine off (water walks ...
Mercury Outboard Water Pump / Impeller Replacement
... don't bend the water tube. 4. Remove the pump housing, impeller, wear plate ...
Outboard Overheating: A Diagnosis Flow That Doesn't Guess
... completely failed pump. Pull the thermostat and test in hot water; check the service ...
Sterndrive Spring Recommissioning Checklist
... pumps water into the oil or bilge. - Oil level and condition (milky = water; find ...
Submerged PWC / Water Ingestion: The First 48 Hours Matter
... Check pump oil too. 7. Address fuel: water in the tank means pump-out ...
Suzuki DF Lower Unit Oil Change and Water Intrusion Signs
... Install the vent plug first, then swap the pump for the drain plug quickly ...
The On-Water Diagnosis Kit: What's Actually in the Bag
... for EFI rails - Vacuum/pressure hand pump (lower unit seal testing, fuel primer checks ...
Yamaha WaveRunner No-Start Diagnosis
... fuel — listen for the fuel pump prime (EFI models), check fuel pressure at the ...
Two-Stroke vs Four-Stroke Oil: What Goes Where and Why It Matters
... verify the injection system actually works — a failed oil pump seizes powerheads. Many owners ...
Marine Batteries and Wiring Basics
... tinned wire only.** Automotive wire wicks water up the strands and rots from inside ...
MerCruiser Winterization (Raw-Water-Cooled)
... 4. **Pull hoses at low points** (raw water pump inlet, cooler lines) and drain ...
Boat Trailer Bearing Service (and Bearing Buddy Myths)
... Pressurized caps help keep water out **when maintained**, but pumping grease through them for ...
Pontoon Boat Inspection: Logs, Leaks, and Pre-Season Checks
... Aluminum logs are chambered; a leaking chamber can hold a lot of water before ...
Anodes and Galvanic Corrosion, Explained for the Dock
## The problem in one paragraph Put two different metals in water that conducts (salt ...
Ethanol Fuel Problems in Boats: What It Does and How to Treat It
... E10's ethanol is hygroscopic — it pulls water out of the air until the ...
Outboard Power Tilt/Trim Troubleshooting
... fill and cycle repeatedly to purge. - Failed pump coupler or internal valve body — quote ...