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I have three customers with RX8's, have had all come in on the hook, in the past years, flooded, cranks fast, no start-no compression, when winter temps are here, one will be back soon because he changed nothing, other removed oil injection sys. & now adds 2cyc to gas, other removed synthetic oil & now uses old fashion REAL oil (that's what he used in his RX7 for 15 years) has had no prob. (it burns, not as well as 2cyc but,,,,,,) he's happy. David R. Cook RV6A Rotary Lansing MI.
On November 29, 2017 at 9:22 PM "Todd Archer archerwt@gmail.com" <flyrotary@lancaironline.net> wrote:
Sounds like you got it sorted, Dennis. I would imagine you are good to go. A standard shutdown practice for injected RX7s (FCs: leaky injectors common) is to goose the engine the instant before turning off ignition. With the ignition off and the engine at =>3k, keep your foot to the floor. This ingests a bunch of air without the fuel. Minimizes the build-up of raw fuel for the next start. Pretty much the same as the standard lean-cutoff shutdown in carbureted aircraft engines. Todd Archer On 11/29/2017 5:04 PM, Clouduster clouduster@austin.rr.com wrote: I had a no-start of my RX-8 in my RV-7A about three weeks ago. I had rebuilt the engine starter and after re-installing it, I started the engine 3 times to make sure the starter was performing properly. Everything was OK. I got in the airplane 2 days later and the engine turned over but did not start. I ran the P 680 battery down trying to start it. I discovered I had NO compression on any of the 6 rotor faces! I checked the ignition, injectors and cleaned the plugs. I also squirted some fuel into the spark plug holes to try to get it to fire. I finally squirted 2 stroke oil into each rotor face using the prop to rotate the engine. I sprayed 2 to 3 squirts per rotor face using a hand oil dispenser. The engine fired several times but did not start on the first try – I let it sit 3 hours and tried again. It started and after about 10 seconds it ran smoothly. It filled the hanger with smoke burning the oil! I figure I must have left some unburned gasoline in the engine when I tested the starter and this washed most of the oil out of the seals while sitting a couple of days. Hence no compression. This is only a guess - I ran it on the ground several times and have flown it about 5 hours – everything appears back to normal! PS – I don’t ever measure the rotor’s compression. I only turn the prop thur by hand – compression is back to normal. Dennis Haverlah RX-8 in RV-7A About 800 hours
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