Thanks for clicking on this thread.
Do you know about 9.8 Mercury 110 2-stroke engines? Mine ((serial# 3923125 (1970-1974, i think)) will only start with starter fluid, and won't run after it burns it off. Yes, its dangerous for the motor; I am careful not to over do it with the ether. Anyway, it won't run, as if it is not getting fuel.
Me: no experience with outboards, limited 2stroke experience past carb cleaning my chainsaw or motorcycle. Please explain like I am 5 years old if you use parts names only on outboards.
Compression: symmetrical climb to 120 exactly on both cylinders after four pulls
spark: great on both cylinders ~1/4inch
Spark plugs: the top cylinder spark plug is dry compared to the bottom
Carb: took apart (twice), cleaned with carb cleaner, afraid to soak it overnight for fear of gasket distortion on difficult to find parts. It looks very clean. Pressurized carb cleaner moves freely through the jets.
When purchased, the motor was sometimes hard to start and often required starter fluid to get going. It was stored improperly for two years by previous owner, who said it was "rebuilt" by his mechanic prior to that storage. The previous owner ran some West Marine fuel system cleaner treatment, and it worked well enough for me to buy it and run it ~5 times on the water.
While in my possession:
It sat unused for a month, so I tried to start it in the test tank to be nice to it during storage. It ran for a while, roughly, then suddenly had trouble peeing after it got warm. This is when it really started acting wrong. I cleared the exit point on housing for the water of black hard deposits and it peed normally, but began running rough and sounded different (weaker?), then stopped running. The kill switch broke (when I pushed it), but it still would start with ether. Then it would not start at all without starter fluid. A few minutes later of running, it quit.
I became aware of the whole ethanol problem for outboard motors at this point and got new fuel and treated it.
I pulled the carb, tested and cleaned the plugs and tested compression. It pees fine, but will not run past the ether blast.
It will run for a second if I put gas/oil mix directly into the cylinder via spark plug hole.
-Does anyone have a cross section diagram of a 2stroke outboard similar to mine I can study?
-Is there a fuel pump? How does the fuel move to the cylinder(s) from the carb?
-What is the seal/gasket under the pull rope that appears loose here and is it a problem?
-Are there any carb adjustments i should try besides the idle screw on top (closed, then opened to 1.5 - 2 turns)?
-Does anyone need a large, smelly paperweight near Austin, Texas?
I would really like to learn this stuff for myself for safety on the water.
Thanks again for looking and thanks in advance for any help you can provide. My wife, dogs and chicken really want to go out on the lake soon, and I am failing them all.