13b Rebuilt

unkleg · 07-15-2012, 12:40 PM

Hello all,

I had my 1985 13b just rebuilt and got it running. It was running a little rough so after about 10 mins I decided to do some checking, after doing a compression test the front rotor is getting 120psi the back is only getting 65psi so I feel the apex seals are not seated. I did take it for a drive and got it to operating temp brought it back and did a test again with same results. I am running 2 stroke oil with fuel just in case someone ask that question.

My question is how long should it take for them to seat?

Thanks for any help I get.
Greg

bryant · 07-16-2012, 02:54 PM

it all depends on the builder, some say 2000 miles some as much as 5000 for brake-in.
but i would recommended http://mazdatrix.com/q-supply.htm instead of just two cycle oil.
it is designed for premixing in rotarys.
but that number does sound low..

12arotary · 07-20-2012, 10:41 AM

sounds wayy too low, you might have another issue

07-15-2012, 12:40 PM	#1
unkleg The Newbie Join Date: Sep 2011 iTrader: (0) Posts: 10 Rep Power: 0	13b Rebuilt Hello all, I had my 1985 13b just rebuilt and got it running. It was running a little rough so after about 10 mins I decided to do some checking, after doing a compression test the front rotor is getting 120psi the back is only getting 65psi so I feel the apex seals are not seated. I did take it for a drive and got it to operating temp brought it back and did a test again with same results. I am running 2 stroke oil with fuel just in case someone ask that question. My question is how long should it take for them to seat? Thanks for any help I get. Greg

07-16-2012, 02:54 PM	#2
bryant Rotary Fan in Training Join Date: Feb 2008 Location: Montgomery, Al iTrader: (0) Posts: 31 Rep Power: 0	it all depends on the builder, some say 2000 miles some as much as 5000 for brake-in. but i would recommended http://mazdatrix.com/q-supply.htm instead of just two cycle oil. it is designed for premixing in rotarys. but that number does sound low.. __________________ 94T-78 (Want 500WHP)

07-20-2012, 10:41 AM	#3
12arotary tumor-syphilis-itis-osis Join Date: Sep 2008 iTrader: (0) Posts: 191 Rep Power: 17	sounds wayy too low, you might have another issue __________________ 82 300d 82 Gsl 84 b2200 Diesel 88 gxl