I have a Wren 54SS in my Boomer with 25 hrs on the plane and engine. The 54 has been flawless until now. I Let her sit for 4 weeks until today. I set up as normal and started the start sequence. The 54 timed out. I checked the glowplug for glow, the propane was good as well. I started the sequence and it agained timed out. I put the throttle full and the pump kicked on after a few seconds. I then started the sequence again and it fired up. Temps looked good rpms were 45K and full throttle was 154k. I flew for 4mins and landed. The boomer came to a stop and I went to full throttle but the rpms only went up to 75k or so the boomer would not budge on the grass. I walked over and she would not spool up to full power. Is this a fuel pump issue or send it in for a tune up due to the Total time 25hr? Thanks for the help. ChipperG