The 130 ho is not a detuned 150...its a hoped up 115. The 150 is a v-6 and the 115 and 130ho are v-4's I have a 115 and have had no problems with the exhaust valve getting stuck. I have replaced one stuck valve over the years of working on evinrudes, and thats because it had a ton of hours at idle, and not useing xd-100 oil.
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