Old 06-05-2016, 01:59 PM
Tech Adept
Tzicul's Avatar
Join Date: Feb 2014
Location: Bucharest, Romania
Posts: 163

You just had bad luck. I'm now in process of rebuilding my 454 because I couldn't tune it anymore and found that front bearing seal was gone and the temperature goes high after 2-3 minutes of running. Lucky me, when I opened the engine I found that rear bearing had maybe 1 mm transversal play and the conrod was touching the crankcase. Probably very soon might have happen to me what happen to you. But I've got thru mine maybe 6-8 gallons of fuel. On the other hand, i just destroyed my GXR21 but I have no idea how, I just found that the piston has some deep scratches. Never run it without the air filter, the bearings was just fine, no loose parts. The only thing that came my mind is a broken plug, but... I don't know for sure.
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