John, Netters & Fred: Sounds to me like the engine is sick...Mid 70's compression is too low. Either you have some rings that are not seated, valves too tight or you may have some burned or unseated valves or valve seats. A compression test is good, a leak-down test is always better. Do a leak-down test on the engine to determine the cause of low power. If engine is new, or recently rebuilt, check the intake and exhaust ports for blockage, it wouldn't be the first time someone has fired an engine with rags or paper towels crammed into the ports. Hope this helps...
John Bouyea <john...@speakeasy.net> wrote: I'm writing for an owner of a new-to-the-area-KR2. He has a Hapi 1835 on his relatively plans-built KR2. Static engine runs are showing only 2400 RPM with a Props Inc. 54 x 47 prop. I'm thinking it is over-pitched. So far Fred has: * done a compression check and found all in the mid 70's * verified the timing is correctly set * they are replacing the intake filter and replacing the suspect carb. I've encouraged pulling the twin 2 into 1 exhausts to inspect for any possible blockage. Besides a possible (probable?) bad tach, what other areas should Fred and his A&P be looking for that might cause this issue? Thanks and I'll forward your replies to email-less Fred! John Bouyea KR2 - hanging the engine accessories KR2S - boat hanging from the rafters www.bouyea.net _______________________________________ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html Scott Cable KR-2S # 735 Wright City, MO s2cab...@yahoo.com --------------------------------- Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages!
