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#1
IP: 99.145.61.19
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Starts and Runs (sort of)
Hi All
Have an A4 that starts and will barely run at idle (just chugs) when the throttle is applied she dies. In the last three years new points, plugs , rotor, and cap have been installed as well as a new electronic fuel pump. This engine has run flawlessly for the last 30 years (until I sold it to the present owner ). We thought it may be the carb and rebuilt it however the problem still persists. Thanks |
#2
IP: 107.77.106.32
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Clogged exhaust?
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#3
IP: 98.165.207.17
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Clean and dry fuel?
__________________
Jim Zeller 1982 Catalina 30 Kelleys Island, Ohio |
#4
IP: 97.93.70.7
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j-19, how do the plugs look? A few pics of them may be a big help.
If the exhaust has not been done for 5~6 years or longer this would be a big possibility. This scenario "USUALLY but not always" sort of sneaks up over a few months not all of a sudden. Give this some serious thought and it is not to difficult to test in most cases. Fuel can be an easy test with an aux tank with fresh fuel also an easy test. One other possibility is the choke not "opening" when you think it is so a visual check will eliminate this possibility. Clean fuel, properly timed spark and clear exhaust equal good performance. When cleaning the carb was special care done with the float setting and the sealing of the emulsion well in the center of the fuel bowl? this seal is very important for proper metering. Dave Neptune |
The Following User Says Thank You to Dave Neptune For This Useful Post: | ||
thatch (04-09-2019) |
#5
IP: 99.145.61.19
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Thanks All!
Didn't think about the exhaust. Will definitely take a look at it. Had the choke problem in the past so that was one of the first things I checked. This problem began at the very end of last season and they limped into port with the engine just barely running. The new owner rebuilt the carb himself with a kit from Moyer as well as the instructional video and nothing changed. We used the starter to winterize the engine and are now trying to figure things out. I have a strong suspicion that this is a fuel problem as this boat does way more sitting than sailing. Will try running off of a jug of fresh fuel and see what happens. Thanks , will keep you posted! |
#6
IP: 47.54.60.174
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Check compression, especially if it has been sitting a while. Some will start with partially sticking valves but just have nothing and die on throttle up. Worth a check. Many overlook this until they've tried everything else. Air, fire, fuel and compression.
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Mo "Odyssey" 1976 C&C 30 MKI The pessimist complains about the wind. The optimist expects it to change. The realist adjusts the sails. ...Sir William Arthur Ward. |
#7
IP: 70.185.132.18
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Quote:
Has the prop been checked for fouling? TRUE GRIT Last edited by JOHN COOKSON; 04-15-2019 at 04:30 PM. |
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