91 v135 problems

brielly

Petty Officer 3rd Class
Joined
Apr 1, 2008
Messages
84
I thought I had solved my problems but after a long trip and breaking down I guess not. So far Ive rebuilt the carbs, fuel pump and installed a new rectifier and checked all fuel lines, filters and tank. Ive squeezed the bulb while its almost dying but that doesn't seem to do anything. The problem only arises after running for at least a 1/2. It will run flawlessly at 30 mph but when I back off the throttle it sputters at slower speeds. After shutting down it will barely idle and just dies if I try to give it gas. I'm assuming this is some type of iginition problem since I imagine if it was fuel the problem would be more consistent??? Unfortunately it looks like I will have to break down again to duplicate and check the problem. I'm planning to bring my spark tester and an extra coil hoping that its just a bad coil. Is there anything else i should check while this is happening? I'm also wondering if the oiling system could cause this problem after running for a while. Ive noticed some oil lying in the bottom of the cowl and it is a bit smokey at startup but not too bad once running. I guess I'll pull the plugs and see if they are fouled. If anyone can give me any suggestions on what to test or look for when this happens i'd appreciate it.
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: 91 v135 problems

Opps - Old Post - Oh well, it's sound advice ...

First, sorry to hear about your problems. The first thing I recommend is that your stop your current trouble shooting efforts and buy a manual.

With a manual in hand, perform the troubleshooting techniques as described in the manual. If you don't already own the proper testing equipment, you'll need to buy or borrow them.

Once you've done the troubleshooting then bring the results back here and we can help you analyze them.

Please understand that without the test results we'd could lead you down incorrect paths which would be both frustrating to you and could potentially damage your engine.

Here's what can happen when the homework isn't done:
http://forums.iboats.com/showthread.php?t=347664
 
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