I have read alot of post that talk of carbon build up on the apex seals, can anyone tell me what causes this and is there a preventive method of keeping the apex seals as clean as possible. most posts talk of a red line a day keeps the carbon away, but are there other preventive methods available too.....

 

Running these engines slow and easy is the surest way to get carbon buildup. I subscribe to the redline a day method myself. Removing the OMP and running premixed 2-stroke oil will also help keep the carbon away.

--Bob

 

so the carbon buildup is caused by the oil? i still have the omp (not real sure that its working good) so i also pre mix with 2 cycle for extra protection,,,so if my omp is working and im adding premix most likely im sending too much oil into engine......guess i should take er on the xway every so often,,,,thanks bob....

 

Keep in mind that the OMP is just part of the problem. If you're carb or ignition is not functiioning properly that can also cause carbon buildup. It' s just the nature of the rotary beast so the best way to keep it clean is to make sure everything is functioning properly and to run it hard. The so-called ATF/MMO treatment should never need to be done on a properly running/run rotary.

--Bob

 

rev it up to 9K at least once a day to prevent carbon build up.

 

ummmm dunno about 9k, but 8k is good enough for my sp 12a

 

I recommend using Amsoil "power foam" to decarbon rotaries. Carbon deposits in the apex seal slots are the most likely to cause problems. Do a search for power foam and you should find some of my posts outlining the proper procedure.

 

I use Chevron Gasoline, which is supposed to keep the valves on a piston engine clean. so far, no problems with the rotary. It runs GRRRREEAAT!!

 

Carbon,,, no way around it. fact of life. Diamonds are carbon base.

 

Yeah, even piston engines, which *don't* inject oil, get carbon buildup.

I wouldn't necessarily say a redline a DAY is necessary, though it is kinda fun

The method my dad and I use on almost all our cars is that once a month you take it for a good spin. A good chunk of highway driving, lots of varying RPMs (ie: twisty mountain roads), and a couple of redlines. Once a month doing that will blast the carbon straight out.

Also, keep your fuel filter clean (hell, for 4 dollars and 5 mins, do it at least once a year)... Try and get clean gas if you know area stations have it, stick to low octane, and find out if your OMP is working or not.

PreMixing and having an OMP isn't gonna cause carbon buildup THAT much faster, but driving your car like a granny all the time will. Don't abuse your car or anything, but at the very least, give it some lead-foot once in a while

Jon