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.
14 articles for “leak”
Pontoon Boat Inspection: Logs, Leaks, and Pre-Season Checks
... Aluminum logs are chambered; a leaking chamber can hold a lot of water before ...
Outboard Power Tilt/Trim Troubleshooting
... movement, or it leaks down), and **mechanical** (bent, seized, or leaking rams). Identify the ...
Ethanol Fuel Problems in Boats: What It Does and How to Treat It
... Explain, document, and do not start the engine until the leak is found.
Hydraulic vs Cable Steering: Diagnosis and Service
... Smooth and powerful, prone to leaks and air. ## Cable steering complaints - **Stiff or frozen ...
MerCruiser Alpha One Bellows Inspection: The Boat-Sinker Check
... after rain (deck leak) vs after floating (below-waterline leak). ## The listen test With ...
Outboard Fuel Pump Diagnosis: Lift Pumps, VSTs, and Primer Bulbs
... 3. **Bulb never firms:** air leak on the suction side, failed bulb check valves ...
Sterndrive Spring Recommissioning Checklist
... Diagnose (block crack, manifold leak, resting water intrusion) and re-quote.
Sterndrive Gimbal Bearing and U-Joint Noise Diagnosis
... If either failed rusty, the bellows leaked. Replacing the bearing without new bellows sells ...
Mercury Outboard Water Pump / Impeller Replacement
... tube grommet so the pump output leaks into the midsection - Running the engine dry ...
Sea Trial Checklist for Mechanics
... check: what came in? - Engine visual: leaks (fuel, oil, gear lube streak behind the ...
Trailer Surge Brakes: Inspection and Service
... wheel cylinders (peel the boots; wetness = leaking). Disc setups fare better but check pads ...
Yamaha WaveRunner No-Start Diagnosis
... Ignoring why the electrics corroded — hull leak, missing seals, or a habitual submariner owner ...
Evinrude/Johnson Two-Stroke No-Spark Diagnosis
... Look under the flywheel for a melted or leaking stator — visible tar means it ...
Reading Marine Spark Plugs: A Diagnosis in Your Hand
... Think air leaks (carb base gaskets, crank seals on two-strokes), water in the ...