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Checking for air leak in fuel lines

"T" fitting, pressure gauge, short piece of hose on each side with a male and female fuel connector. Or, do what everyone else does--replace all of the fuel line periodically and replace the fittings or O-rings.
 
I think I found it, the most inaccessable fitting on the fuel/water seperator was not as tight as it should have been so I tightened up the jubilee clip. Now the inline fuel filter near the engine stays full rather then half emptying.

I also found a broken spark plug lead so I will buy a replacement set tomorrow and see if all my problems (well some of them, after all its an old boat) are resolved.
 
OK, the latest in this saga.

I replaced the broken spark plug wire and it idles much better. In addition the inline fuel filter which is placed just before the fuel pump now stays full.

Thats the good news. The bad news is the engine still stalls. Sometimes I can keep it going by applying throttle but it will still stall in the end.

Any view of where I look next?

Thanks
 
We need to know what engine you're speaking of now. Initially it was a air/fuel leak question...... now it's a performance question.
 
OK it is a Johnson 115 V4. I am told the engine is a 1996.

I have posted some photos on this site of the engine under some other threads if that helps.

Thanks
 
I assume that you've entered info about stalling on some other thread, unfortunately I don't have time to search for it. If you've already checked compression and spark, the usual problem is fouled carburtors.

Compression should be approx 100+ psi and even on all cyls.

Spark (with plugs removed) should jump a 7/16" gap with a strong blue lightning like flame.... a real SNAP!
 
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