jamesrxx951
100cc
Well since the wife and I are getting ready to finish our house to put on the market flying season for me is over. Part of my yearly inspection on my engines is removing the jugs to check the cylinders, pistons, bearings, etc. Just to make sure everything is good. My DA170 was purchased new in 09 and I bought it from that guy in 2010. He claimed low run time but who really knows. However there was some scratching in the piston and cylinder between the exhaust port divider. But it did not seem to bad and the engine ran good. 2 years ago when it was at DA they did take it apart for an issue I was having and they never said anything about it either. I have always run Stihl HP Ultra roughly 40:1 for 300 or so flights at this time. The engine almost looks brand new inside and the cylinder and piston scoring has not changed. That carbon build up on the pistons cleaned up really easy because it was soft. Last night I decided to polish up the engine a little before I get the bearing replaced. Due to age of the engine I plan on sending the engine to DA tomorrow to have all new bearings installed and case seals. It is not needed because they feel good but I want new ones installed plus I will have them check it out to see if anything can be done to smooth it out. Maybe there is something they can do.
BTW this engine has heated up to 350F a few times when I found out the plane needed better baffling. There are no signs from this overheat from a few years ago
BTW this engine has heated up to 350F a few times when I found out the plane needed better baffling. There are no signs from this overheat from a few years ago