OMC Recirculation System??

**imq707s** · 06-27-2006, 11:43 AM

Can someone give me some info on the OMC recirculation system that is on the Looper motors? My looper is smoking more than usual at idle, and several people have suggested cleaning the recirculation system lines, and the check valves..........but nobody has really given me any info as to what lines and check valves I need to clean.

Can someone please help me out. What am I looking for? What's the point of the recirc system on OMC's?

Thanks.

**Over-Easy** · 06-27-2006, 01:19 PM

Go to Evinrude.com, then go into the N. America section, then in the lower left corner there is a link to engine diagrams. Those are the exact one the parts guys see when we look up BRP parts. Those diagrams are pretty helpful in finding those check valves and the factory hose routing. Hope this helps.

**imq707s** · 06-27-2006, 01:23 PM

Awesome!!!! I wish I would have known about that a long time ago

**imq707s** · 06-27-2006, 01:33 PM

well, I went through every diagram there was....and I still can't find what I'm looking for. Are the little valves just called check valves, or do they call them something else? I just need to know where to find the check valves...then I'll be set.

Does anyone know where the check valves are located? Are they metal or plastic? How many are there? Thanks

**BarryStrawn** · 06-27-2006, 02:14 PM

The plumbing diagram is in the factory service manual. What year and model is the engine?

**imq707s** · 06-27-2006, 02:21 PM

It's a 1989 Johnson GT-200 Looper. I found the correct drawing.....and it looks like there is only one plastic check valve in the recirc system......is that what everyone keep talking about cleaning? It actually is a plastic T fitting with a check valve in it. Is there more checkvalves or fittings that need to be cleaned?

Thanks for the help.

**Rickracer** · 06-27-2006, 02:43 PM

They call it a recirculating fitting. http://epc.brp.com/default.aspx?brands=ej&lang=E , I think there should be 6 of them altogether ...

**imq707s** · 06-27-2006, 02:56 PM

OK.....so they are actually screwed into the block at the base of each cylinder? Are they actually check valves, or just fittings?

I'm assuming that I just need to unscrew them out of the bock and soak them in carb cleaner?

I hope it's that easy! I also hope it makes my Looper idle better

Thanks

**Rickracer** · 06-27-2006, 03:07 PM

But I looked at one of the '89 200s, I think it was the 3rd one down, and it showed #11 as a recirculating fitting.

**Rickracer** · 06-27-2006, 03:08 PM

...but they alway made a big difference on the crossflows I've done.

**Lockjaw** · 06-27-2006, 03:15 PM

I like brake clean for stuff like that. Carb cleaner doesn't evaporate fast enough.

Don't use the stuff in a paint can, it will pull paint off anything it touches, I had it clog up an oil pick up screen on a newly rebuilt engine once. You better believe I never built another one and left factory paint inside the motor anywhere.

Pissed me off to, that was a sweet motor. I drove it for over 40 miles with 0 oil pressure, so don't ever tell me Mobil 1 isn't some good stuff. It has little to no wear either.

**Rickracer** · 06-27-2006, 05:46 PM

....you should be able to blow through them one way, but not the other. I would avoid any high pressure air though, they only operate at crankcase pressure and vacuum. Let em soak in some brakleen for a few hours, then check em to see if they work.

**imq707s** · 06-27-2006, 06:14 PM

OK.....I went out and pulled the cover off of the motor.

It looks like there is a fitting at the bottom of each cylinder, and then a hose that goes from that fitting to another fitting on the intake. I pulled all of the fittings on the intake out and cleaned them....but they are not check valves....but they do have a screen in them than I cleaned.

How am I supposed to get the fittings out that are in the block?? They don't screw in....are they pressed it? I tried clamping onto one with a wrench and pulling it out but it won't budge!

Check out the pic.

I also found a plastic T-fitting that is also a check valve. The hose runs from the top of the motor all the way to the bottom...and the check valve T's off and runs into an intake fitting. I removed that check valve and cleaned it. It seemed to be working.

**Rickracer** · 06-27-2006, 06:53 PM

You can take a short piece of hose and check it with pressure and vacuum. I guess Loopers are different....

**RH16** · 06-27-2006, 10:47 PM

I've always wondered what the re-circ really does. Does it just remove oil that has pooled in the crankcase. For a HP engine would it be OK to remove the hose and block of the nipples at both the block and crankcase end.