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5.7 ski for mikew

 
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ryan orourke



Joined: 29 Oct 2007
Posts: 4

PostPosted: Wed Oct 31, 2007 11:49 am    Post subject: 5.7 ski for mikew Reply with quote

mikew the numbers I got off the carb are SAE J1223 Marine. Will the accelorator pump cause the engine to stall at idle? I'm having a tough time keeping it running at idle. Again from 600 - 1000 rpm's it bogs out and then seems to run fine after feathering it to get past 1000 rpm's. Seems to run fine at high rpm's even when giving it hard throttle. Thanks again for your time and help.

ryan
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MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Wed Oct 31, 2007 2:15 pm    Post subject: 5.7 ski Reply with quote

Hi Ryan, the accelerator pump won’t cause the engine to stall at idle. It will cause the engine to stumble and possibly stall when trying to accelerate. If you are having problems at idle, I would make sure the choke is working properly. The carburetor should have an electric choke that heats up once the ignition is on. The butterfly on the carburetor should be completely open after a minute or two. When the engine is cold, pull the flame arrestor off the carburetor. The butterfly should be closed. Turn the ignition switch on and watch to see if the butterfly gradually opens. If not, check the voltage at the choke. There is a hot wire and a ground wire on the side of the choke. The number SAEJ1223 is not a part number. It is a Marine Specification number. Look again on the carburetor, you will find another number.
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ryan orourke



Joined: 29 Oct 2007
Posts: 4

PostPosted: Wed Oct 31, 2007 6:49 pm    Post subject: carb 5.7 Reply with quote

mikew. I took the flame arrester off and looked at the butterfly. The butterfly was open when cold? I believe you said it should be closed when I took the areester off and engine cold. I manually closed the butterfly and did see it open gradually. If the choke is bad would it still open. Is it possible for the choke to still open but not function properly. When the boat was warmed up it still didi not seem to run right at idle. When i put it in gear at idle it bogged out. It seems to run lousy from 600 rpm's to 1000 rpm's and then runs fine at higher rpm's. This friggen carb is driving me crazy. The strippers are coming and I aint goin. I did have some bad fuel in one of the tanks. I ran the bad fuel out and just filled up with good fuel. No water in the seperater anymore. I'm wondering if I sucked something into the carb? Put stabil, fuel treatment and a little marvil mystery in the tanks after the problem started. Thanks again for your time. I'll look at the numbers on the carb tomorrow.
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MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Thu Nov 01, 2007 7:26 am    Post subject: subject: carb 5.7 Reply with quote

Ryan, when you pull the top off the carburetor, look into the bowl. You might see some contamination or rust. If so, there may be a plugged jet. If that is the case, I would pull the carburetor off and do a complete rebuild.
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wlathchan



Joined: 28 Sep 2010
Posts: 2

PostPosted: Tue Sep 28, 2010 10:17 am    Post subject: Reply with quote

I experienced this one before. The idle should have a minimum RPM to prevent some problem. If you accelerate faster then it could stall. That is the thing that you can do to help it.
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