RE: 90SP Muffler failure on run #4.
Well I don't have a tach unfortunately, but with Coolpower 10% I can get the idle so low you can actually see the prop as it swings around... and it'll idle like that for several minutes without loading up. Not bad for an engine with only a little over 1 hour's run time on it.
I'm a bit peeved about the muffler coming apart... to be fair, I had read up on these engines quite a bit before deciding to buy one so I was already aware that there've been reported failures of the RCV mufflers. However I'd *hoped* that RCV had addressed the issue and fixed it promptly and that a brand new engine wouldn't come with a poorly built muffler by now. [:@]
Brazing or somehow welding the end of the muffler end into the casing is the only way it'll ever hold together... a press fit just isn't sufficient. Why isn't RCV taking care of this defect in their design?
I like the engine so far, I'm annoyed about the muffler though. Would like to see RCV step up to the plate here on this issue. [&o]
- Michael