Home › Forum › Ask A Member › 1963 rx 11a no fuel issue
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crosbyman.
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October 12, 2024 at 7:06 pm #291471
This engine is not close to firing up but once you spray gas/fuel mix down the carb it fires easily. There is gas with pressure coming out of the fuel line that leads to the carb. I don’t have a carb rebuild kit yet but took the two halves of the carb apart and it was clean. What could prevent any fuel making it to the cylinders? When i pull the plugs after cranking the plugs are dry. Primer bulb gets nice and firm. I went through the ignition and tested both coils (newer coils) tested continuity to the plug boots, cleaned points, and set gap. This engine is new to me and it fired right up and ran for 10 minutes two days ago.
October 12, 2024 at 7:41 pm #291472do a full cleaning on the carb. check idle circuit path on the side of the carb and the top drip chamber …blow all passages with carb cleaner and a blast of air pressure.
at starting fuel is sucked in via the top idle chamber which must be clean.
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https://watercraftmanuals.com/outboard/johnson/manuals/johnson-302231.htm
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October 12, 2024 at 11:35 pm #291473Thank you. How do I initially set the needles? I am familiar with the late 50’s 10 seahorse 1.5 and .75 turns out accordingly then dial in from there.
October 13, 2024 at 11:12 am #291478sounds about right
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October 14, 2024 at 11:52 am #291489Check the easy stuff first – is your choke closing all the way?
Dave
October 14, 2024 at 4:08 pm #291491There is pressure in the fuel line running to the carb…..BUT is there any fuel in the carb bowl?
Could be that you have a simple plugged needle/seat. Most likely can be remedied with a cleaning (no parts required)
October 14, 2024 at 11:03 pm #291499How do I initially set the needles? I am familiar with the late 50’s 10 seahorse 1.5 and .75 turns out accordingly then dial in from there.
That procedure should work. Note that when the choke is on, the choke-action fuel sucked through the carb has nothing to do with the the low speed needle. When starting, if the choke is not completely shut, you will get no extra fuel due to the choke, and you need that unless the motor has just been run. Once it’s running, the higher RPM creates a suction where a partially on choke will add fuel.
Dave
October 15, 2024 at 6:43 pm #291537There is pressure in the fuel line running to the carb…..BUT is there any fuel in the carb bowl?
Could be that you have a simple plugged needle/seat. Most likely can be remedied with a cleaning (no parts required)
So true. This engine has an adjustable high speed needle, not a hex drain plug. But, there is a tiny brass drain screw on the bottom of the carb bowl. Once the fuel line is pumped up, simply remove the brass bowl drain screw so see if fuel is actually in the carburetor bowl. Be very careful though, those little screws are easy to lose.
October 16, 2024 at 8:06 pm #291573I took the carb all the way apart and cleaned it and made sure to put air through all the passages. It has the same issue. I’ll check the choke next. It has an electric choke but they doesn’t seem to work. Maybe the wrong term but the butterfly should completely close when the choke is on?
October 16, 2024 at 8:09 pm #291577The carb bowl is getting gas. I heard the gas rush in when pumped after cleaning it and when the drain screw is removed fuel came out. The choke lever was not coming out all the way, I pulled a little harder and it moved more. I think I need to read up on these old electric chokes. I assumed it was a solinoid that pushes out the choke lever. I don’t think that’s how this works. When I push the choke button the diaphram at the bottom of the carb moves slightly.
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