Outboard Motor Flushers
It sounds simple, but hang on! There's a right and a wrong way to perform this essential task. The buildup of salt in your outboard can cause blockages that result in overheating and eventual corrosion. Back in the day, flushing an outboard with fresh water was done only one way. A set of "ear muffs" or "flush muffs" was fitted around the engine's gearcase to cover the water intakes, connected to a garden hose with a good water supply, and the engine was run for five to 10 minutes.
But today's outboards can be flushed using other, sometimes easier methods, without even starting the engine. Salt and brackish water is a corrosive killer of over 40 dating sites melbourne aluminum from which outboards are made, so flushing every time after saltwater use is a must. Left unchecked inside the cooling passages, saltwater will quickly build up and may cause cooling blockages, leading to overheating and, over time, can corrode an engine from inside out.
All outboard manufacturers recommend flushing according to the procedures outlined in the engine owner's manual after every use in salt, brackish, dirty, or polluted waters. Operating an engine in sandy, silty, or muddy fresh water also dictates the need for periodic flushing. Flush muffs are the most common way to flush an outboard; they're available at most marine stores and online resellers.
They're inexpensive, and easy to use. Connect to a garden hose, fit the muffs water hookup for boat motor the engine's water intakes on the sides of the gear case, turn the water on, start the engine, and let it run. That's it, with the following precautions:. Make sure you have a hose, water source, and the keys to the engine before you start flushing. Built-in garden hose attachments are a standard part of many outboards manufactured in the past decade or so.
These attachments make flushing easier, because the engine usually doesn't need to be running korean dating rumors 2015 in some cases, should not be to accomplish the flushing procedure. Simply water hookup for boat motor to see if your engine has this attachment look in the owner's manualfind the connection point, hook up a garden hose, turn on the water, and let it flow for 10 minutes.
This is handy if you can't start the engine dead battery, for example or if your neighbors would balk at your engine's noise. Some caveats about using a flushing connection:. Soft-sided heavy plastic or vinyl flushing bags fit around the lower unit of the engine and fully enclose it. A garden hose is attached to fill it and keep water circulating; the engine is then started and run much the same as with a flush muff attachment. Flush bags allow for engine-on flushing without the loud noise of the engine's open exhaust.
Online, google "outboard flushing bag," and several options pop up. As with other flushing devices, caution must be exercised:. Most outboard manufacturers' flushing recommendations are similar. All of them make a statement about ensuring that all water is drained from the engine after flushing. This is especially important in freezing climates, so that there is no water left inside the engine that could then freeze, and cause damage.
However, there are some differences, so here they are, straight from the manufacturers themselves:. For flush-muff attachments, temporarily cover the auxiliary water inlets with heavy tape on their to hp models and high-performance Lightning M2-type gear cases remember to remove the tape afterward. Water pressure should be between 20 and 40 psi. You can buy a pressure gauge attachment at a hardware store to monitor psi. Flush for at least five minutes at an idle speed, with the engine in a vertical position.
When using the flushing port, it is not necessary to run the engine. Keep the engine vertical after flushing so that all water drains from the powerhead. Honda's flushing procedure varies by engine size and model. In all cases, the engine must be in the vertical position during flushing and after, to drain the water from the engine. Smaller engines 2 to 20 hp: Flushing in a small container such as a flushing bag, small bucket, or can is acceptable.
For engines 5 hp and up, an optional water hookup for boat motor attachment Honda part ZV is available that allows flushing the engine through a port on the side of the gear case. The prop must be removed and the engine run for about five minutes with either procedure. Either method is acceptable. Midsize engines 25 to 50 hp: Again, the engine must run, with prop water hookup for boat motor, for about five minutes.
Honda warns that if water pressure is low, tape should water hookup for boat motor used to close off the engine's water intakes on each side of the gear case. Larger engines 60 to hp: Honda's only recommended flushing procedure is to use the factory flushing port connected to a garden hose with the engine not running. Mercury's procedure varies by engine size and series. Smaller and midsize four-stroke outboards use the flush port at the rear of the engine. The engine must be warmed up to open the thermostat and circulate water throughout the engine's cooling passages completely.
The engine can be vertical or tilted. Remove the prop, and run in neutral at no more than an idle speed for at least five minutes. The water supply should not be opened more than halfway to regulate water pressure. Remove the prop, attach flush muffs so that the rubber cups fit tightly over the water intakes, then adjust water flow so that some water leaks out around the cups. Start the engine and run at idle speed in neutral for three to five minutes. For flushing without muffs, Mercury offers a garden-hose adapter that connects to a port in the lower engine cowl; this port is accessed by removing a dust cover.
Mercury makes special note of using this adapter to drain the cooling water from the engine by disconnecting it from the water-supply hose, then tilting the engine to allow all the water to drain out. This is especially important in freezing climates. Water pressure no higher than 45 psi should be used. The engine can be running or not when flushing, and flushing should be for water hookup for boat motor least three minutes.
Mercury notes that this procedure should be used when flushing the engine after use in salty or dirty water, and also as a part of preparing the outboard for storage.