Fathom
WaveJunkie PR
- Location
- Central Illinois
Particulars:
Stock ’94 SJ that was pretty much a complete build and never started by me prior to recently.
Compression 152/150
New fuel lines
Strong battery
Good fresh 40:1 fuel mix
HS and LS screws at 1.25 turns
All 44 SBN internals stock, 1.5 N/S, blah, blah, blah
Primer kit
Situation:
I finally got this ski together and attempted to start if for the first time. It started long enough for me to smile after a lot of work, had good throttle response and rev’d freely a few times and then died as I came off throttle to idle. It would not restart.
I pulled the plugs and found I had no spark. I changed coil with a known good one and still had no spark.
I changed the CDI and regained spark. Once it restarted, it would not stop due to a bad switch. It either died on it's own or by me pumping the primer. I'll never know. I changed the switch and it functions, as it should.
I tried to restart and even though it didn’t start easy, it restarted and it died like before but I still have spark. Every now and then, when I attempt to start a small backfire would pass through the exhaust but nothing from the carb that I could hear with the stock FA on. It seemed like flooding caused it.
I disassembled and cleaned the carb. Nothing out of the ordinary was found. Needle and seat looked good as did the jets, internal filter was perfectly clean, diaphragm, etc. I shot all passages with carb cleaner and reassembled the carb. When I tried to start, I had the same exact symptom, hard to start and a slight backfire now and then. Got it to start, fully rev and idle and then it died and would not restart.
I could see the fuel circuit was working as it should. I could see the fuel being drawn and passing back to the tank via the return line.
Thought it may be timing related and needed to rule it out so I pulled the flywheel and looked at the stator. Everything was tight, timing was set where it should be and lock down screws were tight. I reassembled everything and attempted to start and am back to the same symptoms.
The only thing I could think was a busted or non-seated reed causing too much fuel to accumulate in the case. I pulled the intake and found some debris on top of the reeds that could have come from disassembly but the reeds themselves looked well. I cleaned the reeds and prepped all surfaces for reassembly. There was a little fuel accumulation under the crank, enough to say a leaking needle and seat may be the culprit but one thing I failed to do was to pull the flame arrester and look for fuel pouring into the carb from a leaking needle or seat but to the eye, it looked good when visually inspected. I did not do a leakdown test as I don’t have the tester.
I am waiting on the required gaskets and a full 44 SBN rebuild kit figuring it has to be fuel related and I will continue.
In the meantime, is there something I may have overlooked? I've been at this non-stop since yesterday. I need a beer.:1zhelp: :Banane35:
Stock ’94 SJ that was pretty much a complete build and never started by me prior to recently.
Compression 152/150
New fuel lines
Strong battery
Good fresh 40:1 fuel mix
HS and LS screws at 1.25 turns
All 44 SBN internals stock, 1.5 N/S, blah, blah, blah
Primer kit
Situation:
I finally got this ski together and attempted to start if for the first time. It started long enough for me to smile after a lot of work, had good throttle response and rev’d freely a few times and then died as I came off throttle to idle. It would not restart.
I pulled the plugs and found I had no spark. I changed coil with a known good one and still had no spark.
I changed the CDI and regained spark. Once it restarted, it would not stop due to a bad switch. It either died on it's own or by me pumping the primer. I'll never know. I changed the switch and it functions, as it should.
I tried to restart and even though it didn’t start easy, it restarted and it died like before but I still have spark. Every now and then, when I attempt to start a small backfire would pass through the exhaust but nothing from the carb that I could hear with the stock FA on. It seemed like flooding caused it.
I disassembled and cleaned the carb. Nothing out of the ordinary was found. Needle and seat looked good as did the jets, internal filter was perfectly clean, diaphragm, etc. I shot all passages with carb cleaner and reassembled the carb. When I tried to start, I had the same exact symptom, hard to start and a slight backfire now and then. Got it to start, fully rev and idle and then it died and would not restart.
I could see the fuel circuit was working as it should. I could see the fuel being drawn and passing back to the tank via the return line.
Thought it may be timing related and needed to rule it out so I pulled the flywheel and looked at the stator. Everything was tight, timing was set where it should be and lock down screws were tight. I reassembled everything and attempted to start and am back to the same symptoms.
The only thing I could think was a busted or non-seated reed causing too much fuel to accumulate in the case. I pulled the intake and found some debris on top of the reeds that could have come from disassembly but the reeds themselves looked well. I cleaned the reeds and prepped all surfaces for reassembly. There was a little fuel accumulation under the crank, enough to say a leaking needle and seat may be the culprit but one thing I failed to do was to pull the flame arrester and look for fuel pouring into the carb from a leaking needle or seat but to the eye, it looked good when visually inspected. I did not do a leakdown test as I don’t have the tester.
I am waiting on the required gaskets and a full 44 SBN rebuild kit figuring it has to be fuel related and I will continue.
In the meantime, is there something I may have overlooked? I've been at this non-stop since yesterday. I need a beer.:1zhelp: :Banane35:
