Quick Tip, cleaning fuel injectors


AmazingGrace

AmazingGrace

Member
So, my tip / trick will help you clean your fuel injectors on your boat. This requires you to have a screw on fuel / water separator that is installed in the vertical position.

First, start the engine and warm it up. Then, unscrew the fuel filter and dump out the fuel into an appropriate container. Fill the fuel filter with seafoam and screw the filter back on. Restart the engine and bring the idle up to 2500 RPMs. Let the seafoam run through your engine.

Some precautions. Make sure you don't spill the fuel into the bilge, make sure you have the blower on and make sure you have the hatch wide open (I disconnect the hatch and tie it open.)

This has been very effective in cleaning the injectors. You can also use the same technique to winterize in the fall. If your injectors are really bad, you can repeat the process.

Hope this helps.
 
I don't see that as a good idea.

Seafoam is Naphtha, Isopropyl alcohol and pale oil (pale oil is refined oil until it is slight yellow to clear).

Naphtha is a cleaner and flammable, so at it will burn. Fuel injector nozzle's are fairly small, and if something comes loose between the filter and the injector, it could very well get clogged.

Many folks do this method of cleaning and swear by it, I'm just of the opinion that if the fuel system needs cleaning, maybe clean it the correct way. Injectors need to be flow tested to make sure they will flow correctly from idle to WOT. If one or more lean out just a little to much there is detonation.

Just my opinion

I don't use it, but sure wish I bought stock in Seafoam years ago
 
I use a similar method, but I would not remove and load up the fuel filter as described. A better approach IMO would be to connect a small auxiliary fuel jug to the input barb on the fuel filter and feed the fuel system that way.

Whether you use seafoam or an injector cleaner, you can mix it with some gasoline in the fuel jug, so the engine will get some gas.

In my experience, the engines don't run on 100% seafoam, but will tolerate a 50/50 mix of seafoam and gasoline.

As AllDodge indicated, if you really need to clean the injectors, then the old fashion way might be in order.
 
This method has enough fuel mixed in by the time it gets to the injectors. And it doesn't need to be Seafoam, any injector cleaner will work.

But, all the precautions are noted. It has worked just fine for me.
 
Get yourself some Star Brite Startron Gasoline Additive. Besides using for stabilizing gasoline, it will clean your injectors. I used it faithfully on both of my 7.4 L Mercruisers. They always ran 100% after a treatment. Cheapest place to buy is at Wal-Mart.
 
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