Compression Test

[Firebob]

Ok hope this is the last question. I am not good with 2 stroke engines. So I put the cart up on a jack to run it, I had the governor disconnected for other reasons but now it is back firing. What causes this problem. Also what should the gap be on the spark plug.

[Firebob]

Hello to anyone that may have more suggestions. I have been having issues with my 88 EZ GO 2 stroke ( look at the thread history ). I took the advice of one of you wonderful people out there and pulled the engine back out and checked to make sure I didn't have a broken ring. The compression has been at 90 PSI with a new cylinder and piston and crank seals. I took everything apart and all checked out good, Reassembled and did another compression test. Now when I did this compression test ( I did not have the muffler on ) dont know if this makes a difference but I am still only getting 90 PSI unless I hold my hand over the exhaust then I will get about 102 PSI. I know that this is still not enough compression, but at this point I don't know where to go ? Any help would be great as I am getting ready to scrap the entire rebuild.

Thank You
Bobby

[Nate69]

bob bud i have the same thing also and did the same thing but like i said people said it would run at 90 compression and i showed them and man this thing runs like a raped ape . Hell i even run a little 110 octane in it because i love the smell , lol. i know this dont help you but thats what i have to .. im just going to go with the saying if its not broke dont fix it , lol .

[Firebob]

Nate69,

Thank You for your help. I will put it all back together and give it a try.

Thank You
Bobby

[DOOmsman]

A dumb question. are the windows in the piston facing the intake side?

[Firebob]

Yes the window in the piston is facing the intake side. The rings are installed accoring to the little pins on the piston. Not sure if the rings have a certain way to be installed like a race motor where there is a beveled edge that has to go a certain way but I did not see one. A golf cart shop out here told me to retorque the head but they had no torque specs on FT LBS, but I torqued to about 50-55. Didn't want to snap bolts or crack the head. I am lost for a better compression number.

Thank You
Bobby

[Nate69]

well i herd u can mill the head but i think thats riskey my self

[Nate69]

bob does it run fast with out the govener

[Firebob]

Don't know how it runs yet, before I tore it down this last time I wasn't able to get a test drive with it because it was back firing so bad. That's when I pulled the engine again. Not really sure how to adjust the throttle or governor. Also did you discontinue your oil injection ?

Thank you
Bobby

[Nate69]

o yea bud its gone i use 100; 1 amsoil !! mixed gas.