85 omc sea drive
 

Ok you motor guys I need some help. So the motor idled ok but rough the frist time I took it out. Decarbed it with seasfoam then broke the carbs down cleaned them with carb cleaner and compressed air. I didn't take the jets out just cleaned them really well. Put new gaskets, needle and seats, adjusted the floot values, then bolted it all back on. Now I can't start the engine unless the spark advance is all the way forward to the stopper and at a higher rpm then a normal idle. it runs normal at the higher rpms, just cant get it to stay running at lower the rpms. As soon as I move the throttle back and the spark advance changes the engine up and quits.

What did I do?!?

I'm no motor person but I have two thoughts something is in/blocking the low speed jets.
Or the timing got all out of sync. (I did remove the spark advance arm to work on the carbs).

You guys got any ideas? I'm I explaining it correctly?

I'll try and take a few pics tomorrow

You need to do a sync and link, try to google up the factory service manual to explain it. OMC did have good manuals. Did you soak the entire carb? make sure you got the little round gaskets in place around the brass tubes that go into the bowls. If you used an aftermarket kit, take the bowls off and check that the mating surfaces matched up on those round gaskets.

Thank Spare,

I didnt soak the carbs just sprayed them.

I did use an aftermarket kits so I'll have to check.

I think the link and sync it the problem, I'm going to see if I can get some help doing that see if that works.

Thanks again

you will need to soak them, pull the welch plugs out as well to make sure you get all the crud out behind the idle transfer ports

I did pull the welch plugs, there really wasn't any thing there.

I'll pull them and soak them before i do the link and sync

thanks

most people dont know about the welch plugs or how to install them back in place.

Found out about them them on YouTube.
Any tips on putting them back? The video I saw the guy used a socket extension and just hit it a few times with a hammer. That's what I did was that right or wrong? I'll link the video

https://m.youtube.com/watch?v=o5cxBMDezuU

Thanks

yeah, that works, we used to paint the edges with nail polish before ethanol fuel came out, don't know how that would hold up now a days, I paint the edges of the external plugs with nail polish or gasola if you can find it