I just did a compression check, and it read 148 psi. The clymer for the 300ex says it should be between 170-200, and i was wondering how bad the 148 reading is. We have been having engine troubles, it gets no power past half throttle and we figured these problems were due to top engine wear, its a 95, but if anyone has any other ideas on what the problem could be, such as something we might be overlooking then that would be great. Thanks.