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.
23 articles for “seals”
Boat Trailer Bearing Service (and Bearing Buddy Myths)
... Always fit a **new seal** — the seal is why the water got in. Inspect ...
Suzuki DF Lower Unit Oil Change and Water Intrusion Signs
... shaft seal cut by fishing line (pull the prop and inspect the seal area ...
Yamaha F-Series Four-Stroke Winterization
... Milky oil = water intrusion; deal with seals before storage so water doesn't freeze ...
Hydraulic vs Cable Steering: Diagnosis and Service
... Find the leak first — check the cylinder shaft seals (wet shaft = seal), hose fittings ...
Boat Trailer Lights and Wiring Troubleshooting
... Consider sealed LED fixtures as the standard upgrade — submersible, low current, no bulb sockets ...
Shrink Wrap vs Indoor Storage: The Honest Trade-offs
... a wet, dirty interior — you're sealing a terrarium. ## Indoor storage **Pros:** best protection ...
Volvo Penta Sterndrive Annual Service Essentials
... Duoprop systems add a second prop and seal set but the logic is the ...
Prop Hub Replacement and the Spun-Hub Field Call
... Clean the shaft splines and **inspect for fishing line at the seal** — every single ...
Sterndrive Spring Recommissioning Checklist
... fishing line check at the seal, grease splines, inspect hub. - Grease gimbal/u-joint ...
The On-Water Diagnosis Kit: What's Actually in the Bag
... Vacuum/pressure hand pump (lower unit seal testing, fuel primer checks) - Infrared thermometer (overheat ...
Outboard Power Tilt/Trim Troubleshooting
... External wetness on the rams = shaft seals; rebuild or replace rams. - Dry outside but ...
Prop Selection Basics: Pitch, Diameter, and Hitting the RPM Window
... bent blades and missing cup change performance and cause vibration that kills seals - Forgetting ...
Transom Rot Assessment: Do This Before You Hang an Engine
... Give a referral, not a dockside patch. ## Common mistakes - Sealing new hardware into a ...
Sea-Doo Winterization Step by Step
... the bilge wet and the seat sealed — spring mildew and corroded electronics - Drain plugs ...
Pontoon Boat Inspection: Logs, Leaks, and Pre-Season Checks
... Repairs range from re-sealing plugs, to weld repairs (marine aluminum welder territory), to ...
Yamaha WaveRunner No-Start Diagnosis
... the electrics corroded — hull leak, missing seals, or a habitual submariner owner ## When to ...
Spring Recommissioning Checklist: Outboard Boats
... dings and fishing line at the seal. ## Electrical - Load-test the battery, don't ...
Sea-Doo Jet Pump Wear Ring Inspection and Replacement
... means water intrusion via the pump seal. 5. Reassemble with new O-rings and ...
Marine Batteries and Wiring Basics
... compromise most runabouts carry. - **AGM/lithium:** sealed, mount-flexible, need charging profiles that match ...
MerCruiser Alpha One Bellows Inspection: The Boat-Sinker Check
... joint bellows is the rubber boot sealing the hole in the transom where the ...
Submerged PWC / Water Ingestion: The First 48 Hours Matter
... hull damage, or a failed bellows/seal. Returning a recovered ski to the water ...
Reading Marine Spark Plugs: A Diagnosis in Your Hand
... Think air leaks (carb base gaskets, crank seals on two-strokes), water in the ...
Outboard Fuel Pump Diagnosis: Lift Pumps, VSTs, and Primer Bulbs
... O-rings, primer bulb, water separator seal). ## Mechanical lift pumps (diaphragm) Driven by crankcase ...