Super Jet Please help!!!!

L

Lipripper

Location
Oakdale
So I bought a 91 superjet took it out and it started and idled fine. Went to get on throttle and it died. That was the end of the day first time out. So it ran but when you gave it throttle it died. Cleaned carb and it did the same thing then it wouldn't even fire anymore. So I rebuilt the carb and it will only run if you keep priming it. Just changed the reeds and it's still doing the same thing. After the carb and reeds it does sound crisper when it runs but only runs when you keep priming it. Checked compression and it's 150 both cylinders. This thing has me so frustrated I'm about to sell it please help.
 
onedumbtrucker

onedumbtrucker

Now with 20% more pulp.
Location
London, ON
After rebuilding carbs it will take quite a while to get the pump filled up with fuel again. How long did you run it for. I usually have to run using the primer for a minute or two total before the carbs are filled up again and it can run on it's own. Also what carb is on it? It could be a stuck popoff needle, or a check valve in backwards or diaphragm in wrong or damaged, depends on the carb.

Pull the plugs, ground the wires and crank it over. Can you see fuel moving in the lines or feeding into the carbs?

Pull off the pulse line that comes from the crankcase to the carbs and put your thumb over it while cranking, can you feel a strong pulse? This is what pumps the fuel.

Hope some of that helps,
Dan
 
L

Lipripper

Location
Oakdale
Lots of air coming out of pulse like fuel pick up clear ran a line from top of take directly to carb and the carb isn't sucking fuel why is this?
 
L

Lipripper

Location
Oakdale
Thanks for all the help guys got it running I had the carb lines hooked up wrong. Now I have another question what is the compression on a fresh rebuild? Just did a compression check since everything is all good and it's saying 175 I thought that may be quite a bit.
 
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