I need your 2 stroke thoughts/help

[thatguy]

I have a VERY old (+15 yrs) Echo SRM210ae string trimmer that I have been tinkering with and finally got it running VERY well, except for getting it started..

The only way that I found to get it started is to pour a little seafoam in thru the spark plug hole and let it set over night.. It then fires on the first pull otherwise it floods and wont start..

Once you get it started it runs great and no longer stops after 10 or so minutes (my issue from my first post looking for help).. and it will restart very easily..

Any suggestion on why the seafoam will kick it off to start? Could I use starter fluid instead so i could get it going that day?

Here is what I have done
-seafoam in carb/cylinder head
-dismanted the carb and cleaned out the screens/ports with Seafoam and brake fluid (to flow the junk out
-seafoam in gas
-new fuel filter
-checked and the gas lines are not deteriorated
-a few new carb gaskets

The seafoam did an excellent job of cleaning/loosening the gunk that built up in/on the carb ports and screens..

Ideas are welcome

Brian

 

[Egon]

The compression may be getting a little low.

 

[oldmech]

Hi! I have Echo SRM230. I must push on Primer button 4 to 5 times before cranking. Do you use your Primer and how many time. May be you need a new button. Good luck Oldmech

 

[JB4310]

I agree with Egon, sounds like low compression. can you still get a set of rings for it.

I have alot of tired old motors, even with low compression they still start though. I usually give a shot of starter fluid or gas in the carb or cylinder to help start ornery engines. But your saying yours is getting flooded.

If you're getting fuel and good spark they should fire up.

I have yet to find a small combustion engine I can't start, I bring junk home from the dump or side of the road and as long as there isn't a hole in the side of the motor I can get it going.

JB.

 

[thatguy]

This unit is so old it does NOT have the primer button..

I say that it is flooded because after trying to start it for a while, when you remove the plug it is dripping wet.. I tried for 15 minutes to get it started and it wouldnt even fire.. Which was not unusual for it BEFORE I started tinkering with it (which is also one reason i started tinkering with it)

The first time I used the seafoam and let it stand overnight it fired up on the first pull.. So that is what I did again - and it worked.. First pull this morning and it was off and running..

Am I correct in assuming that if it has low compression that the seafoam fills the gap around the piston and help to decrease the cylinder blowby?

Brian

 

[JB4310]

This unit is so old it does NOT have the primer button..

I say that it is flooded because after trying to start it for a while, when you remove the plug it is dripping wet.. I tried for 15 minutes to get it started and it wouldnt even fire.. Which was not unusual for it BEFORE I started tinkering with it (which is also one reason i started tinkering with it)

The first time I used the seafoam and let it stand overnight it fired up on the first pull.. So that is what I did again - and it worked.. First pull this morning and it was off and running..

Am I correct in assuming that if it has low compression that the seafoam fills the gap around the piston and help to decrease the cylinder blowby?

Brian

Yes, that's what would make one think there's low compression.

JB.

 

[lightninboy]

I have a 2006 (not old) Echo trimmer that I have had to use ether to get it started when it is cold, which was a letdown because the Echo had been a pretty good-starting engine. I was experimenting with spark plugs today (I figure any spark plug that fits in the cylinder is interchangeable with the original NGK) and got the engine to start without using ether. It could be that the spark plug didn't have a good enough ground to the engine and the spark plug had to be tighter than I had it and it is good to keep the rim around the spark plug hole clean.

 

[Travelover]

..........(I figure any spark plug that fits in the cylinder is interchangeable with the original NGK).........

While it is true that spark plug threads are interchangeable, using the wrong heat range spark plug can burn a hole in the top of your piston. Use a spark plug cross reference chart to make sure that you have the right heat range plug.

 

[lightninboy]

The trimmer won't start without ether again, but it only needs a whiff of ether and it starts.

I'm thinkin' it's a fuel/carburetor problem instead of an electrical problem.

The easiest way to fix it is to always have a can of ether with the engine.

 

[greasemonkeyok]

If it has low compression, it won't heat up the air/fuel mixture to the flash point. The compression heats the mixture, much like a diesel, and the spark merely pushes the mixture over the edge (except, of course, for ether). Try warming up the cylinder with a hair dryer before you start it. It works for me on an old blower.