Boat Engines and Systems

Replumbing Your Used Boat Engine

High-performance engines such as this HP1200SCi from Mercury Racing, have used stainless-steel braided hose and AN fittings for years. They’re strong, reliable, and now they cost less than they used to. Photo Courtesy of Mercury Racing.

You never know what you’ll find when you open the engine hatch on a used boat. One thing you can count on finding is the need to replace a few items. … [Read more...]

Boat Buyers Beware Grimy Engines and Bilges

This diesel engine is not leaking fuel or oil, but dust residue from a loose alternator and water-pump belt coated the front of the engine and created a black mess in the catch-pan underneath.

If you’re looking at a used boat, pay close attention to the outward appearance of the engine. Is it clean or grimy with oil? Are there rusty areas under … [Read more...]

Dripless Shaft Seal Installation

The PSS dripless shaft seal from PYI works by mechanically compressing a carbon to "float" against the shaft

Tired of leaky shaft seals filling the bilge with water or having to replace the packing? The solution is to replace the old stuffing box with a new dripless … [Read more...]

How Long Will a Fogged Outboard Last in Storage?

Spraying fogging oil into the engine's carb and cylinders prevents corrosion -- but for how long?

This is the time of year that people start thinking about pulling their boats and winterizing them. Part of that routine is the so-called fogging of outboard … [Read more...]

Boat Transmissions: Shifty Issues

This PCM transmission is designed for ski and wakeboard boats.

Ski boats, some cruisers, and high-performance boats that don’t have shiftable stern drives use transmissions instead, and that particular piece of the … [Read more...]

How to Winterize a Small Outboard

Time to rake leaves and winterize engines. This 8-hp Merc is standing on its skeg in trash barrel full of clean fresh water.

Let’s say you run your small outboard in salt water all summer and don’t flush it as often as you should during the season. (For a lot of us who leave … [Read more...]

Boat Buyers: Beware of Auto Parts

Any original or replacement alternator for a marine engine is required to have ignition protection.

As I mentioned a while ago in this blog, I used to be an auto parts parts guy. I worked in a parts store and a GM dealership, and I can’t even remember … [Read more...]

Heating Systems for Boats

Diminick Marine manufactures a wide range of boat heating stoves, including this propane fired Newport model for bulkhead mounting.

Many thoughts came together to lead me to write this story about heating systems on boats. The first was my usual annual fall chore of stacking five cord … [Read more...]

Nautical Sound Signals: The Prolonged Blast

Horns can be mouth-powered, hand-held, or fixed-mount, like this one, which has a DC-powered compressor to produce a 126 dB blast.

It’s a clear, sunny day, and you hear a 4- to 6-second blast of a ship’s whistle or horn. What should you do? Please, look for the source! This signal … [Read more...]

Stuffing Box Maintenance

You can use a 3M kitchen pad (not metal) to help scour out the hreads of the packing nut. Doug Logan photo.

It happens every spring: Right after launching their inboard-engine-powered boats, owners are left wondering why they didn’t repack the engine shaft … [Read more...]



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