ifly2
Posts: 72
Joined: 12/30/2001
From: Panama City,
FL, USA
Status: offline
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Here is my troubleshooting so far..
I am using medium fuel lines. I thought that since it also dies about 1/2 throttle, that should eliminate that. I will pull the tank, and check it all for leaks Thursday, when I am off.. It is not popping plugs, I did change it, just to see if it helped. It did not..
This is a new plane, Has not gotten off the run stand. It is a new engine with about 2 tanks of fuel run thru it. The first per the break-in instructions in the book, the second trying to figure out why it dies.. I checked all bolts, and made sure the backplate is tight, and the head is also.
Fuel is not new, but only about 2 months since I opened it. It runs fine in my OS-160FX (however it has a pump). I also am using medium line on the 160, but again it has a pump..
The filter is used, so I will remove it Thursday, and see if that makes a difference.
If it is a temp issue, would it start right up after it dies, and run fine for another minute or so.. I can put the glow driver on, and bump it with my chicken stick, and it will start right back up, and run for a minute or so again..
So Thurs, I will rip the tank out, and double check it. I usually pressure test all tanks, but did not this one. It is the one that came with the plane. (Seagull Laser 200).
Tank pressure tests good.. Filter has been removed.. I'll run it in the am..
Ok.. Here is what I have today.. Removed the Filter, richened the low end to 1 1/2 turns out. Filled tank to about 3/4. Started engine, it idled for about 3-4 minutes fine. Ran it to full throttle, and checked to make sure it was very rich 4 cycle running, not even to 2 cycle yet. Ran for about 4 minutes (glow stick is still on engine) Ran GREAT. Removed Glow stick, and engine died in about 30 sec. Put glow stick back on, leaned high end to just 2 cycle, went 2 cycle, 4 cycle, 2 cycle for a while, brought back to 4 cycle (just into 4 cyce this time). Ran great with glow stck on, took off, it dies. Put on, and ran rest of tank at 3/4 - full throttle.. I guess I'll try the F plug and see if that helps. It appears the plug is cooling. Too rich?? Compression (feels fine)??
Note.. I had always removed the glow stick before..
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OS-120AX quits - 
