I struggled for the longest time with a low engine output problem, which was real and traced to a broken cam follower, which caused incomplete opening of an intake valve. I ALSO found that my tach was inaccurate, which made troubleshooting more difficult. As result I bought two optical tachometers, a portable one kept in my bag and a Proptach that's velcroed to the top of my dash. IMHO Knowing the exact RPMs is critical, when chasing an engine output problem. Eliacim
----- Original Message ----- From: John Cooper To: 'Hartmut Beil' ; 'Techlist Ercoupe' Sent: Tuesday, March 31, 2009 11:27 AM Subject: RE: [ercoupe-tech] RPM at takeoff and cruise altitude >He doesn't have to check his Tach. I didn't mean to imply that the tach was the problem, but It helps to know where we stand. Static RPM is meaningless unless we know the accuracy of the tach. John Cooper Skyport Services www.skyportservices.net
