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#1
IP: 67.149.7.16
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Fuel pump question ...
Hello:
I'm working on a the same "starts but then stalls after a bit" problem that several others have posted about. (A4 installed on a 1981 Catalina 30). I think I've got a pretty good handle on what to diagnose and potentially replace (Carb, fuel line, filter, fuel pump, ignition system, coil, etc.). Thank you for all the prior input! Question though ... I see two replacement electric fuel pumps offered, one is 2-3 psi, the other 3-4. I''m tempted to default to the higher PSI ... but you know what they say about assumptions. Any advice? many thanks, Rob Anderson Hubris Catalina 30 on Lake St. Clair, Michigan |
The Following User Says Thank You to Robs Hubris For This Useful Post: | ||
pknier (06-13-2018) |
#2
IP: 172.95.97.58
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Rob, the higher pressure pump is for the Cat 30 and others like my old boat an E-35. The more aggressive pump is due to the additional length of draw as the tanks are just further away. Also for the same reason there are 2 mechanical pumps as well.
Dave Neptune |
The Following 2 Users Say Thank You to Dave Neptune For This Useful Post: | ||
Administrator (06-13-2018), Robs Hubris (06-13-2018) |
#3
IP: 67.149.7.16
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Dave: Thanks much for sharing ... love the knowledge here. And, I'm glad I asked!
best, Rob
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Hubris Catalina 30 on Lake St. Clair, Michigan |
#4
IP: 71.222.3.150
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Quote:
Can you give us a little synopsis of what's going on with your issues? Changing out the fuel system, ignition and coil may solve it BUT you won't know what the problem actually was. Sort of like solving a mouse problem by razing the entire house and re-building it. Systematically doing one thing at a time will be sure you nail down the issue AND give you a better A4 "education"...
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-Jerry 'Lone Ranger' 1978 RANGER 30 |
The Following User Says Thank You to roadnsky For This Useful Post: | ||
Robs Hubris (06-14-2018) |
#5
IP: 67.149.7.16
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Hi Jerry, sure thing ... appreciate the thought process.
A prior poster, from 2015 I think, posted the exact description. Engine starts normally, ease choke down ... runs, water exhaust good. After a minute or so, there's a slight increase in rpm and it stops. Starts again fine ... runs, little uptick, dies. Starts ..then each subsequent start, the stall interval decreases. Just on a hunch (having absent mindedly left the ignition on for some time) I replaced the coil yesterday and the problem repeated exactly as described above. I ordered a fuel pump from Moyer, with the thought that if it's not needed, I'll have it for back up as the current pump looks downright ancient. thoughts? thx, rob
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Hubris Catalina 30 on Lake St. Clair, Michigan |
#6
IP: 24.152.132.140
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Please repeat the same test with the fuel fill cap removed taking care that no deck water enters (a Catalina 30-specific risk).
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following 2 Users Say Thank You to ndutton For This Useful Post: | ||
Robs Hubris (06-14-2018), thatch (06-14-2018) |
#7
IP: 67.149.7.16
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Quote:
I did fill, nearly fill, the gas tank recently. But the engine ran fine for a couple of outings before the current problem appeared.
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Hubris Catalina 30 on Lake St. Clair, Michigan Last edited by Robs Hubris; 06-14-2018 at 11:03 AM. |
#8
IP: 72.194.220.204
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Try bypassing or shorting across the OPSS. The OPSS can fail in all sort of weird manners. Been there, done it. It kept me guessing for awhile.
TRUE GRIT |
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Robs Hubris (06-14-2018) |
#9
IP: 108.45.44.91
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Quote:
The diagnostic and temp fix are very easy.
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@(^.^)@ Ed 1977 Pearson P-323 "Dolce Vita" with rebuilt Atomic-4 |
The Following User Says Thank You to edwardc For This Useful Post: | ||
Robs Hubris (06-14-2018) |
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