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..Juts when i was thinking I'd fly my Spectra more I start getting engine temp issues.
It's been fine for months and then about 6 weeks ago the engine temps started to rise. I have a thermocouple with display on the back ladder for an easy read on touchdown and like to keep under 260f.
When it started to get above it was a case of just richening a tad ..but despite that it's been running above my target temp time after time even as I've been richening it. I refitted and checked exhaust gasket etc with no benefit. No signs of bubbles in the lines and it's been flying superly..bags of power.
Last week even after richening again the last flight was 270f on a cool day.. and today it came down from it's first flight at 330f.. which is in the danger zone.
I'm guessing it's a dirty screen but rather than mess about the game plan will be to stick a new unused carb on. If it cures it then I'll clean the old carb and burn off the screen. If not then it'll have to be the progressive new clunk and lines approach followed perhaps by new oil seals on the crankcase <sigh>
..when they work they're great..
It's been fine for months and then about 6 weeks ago the engine temps started to rise. I have a thermocouple with display on the back ladder for an easy read on touchdown and like to keep under 260f.
When it started to get above it was a case of just richening a tad ..but despite that it's been running above my target temp time after time even as I've been richening it. I refitted and checked exhaust gasket etc with no benefit. No signs of bubbles in the lines and it's been flying superly..bags of power.
Last week even after richening again the last flight was 270f on a cool day.. and today it came down from it's first flight at 330f.. which is in the danger zone.
I'm guessing it's a dirty screen but rather than mess about the game plan will be to stick a new unused carb on. If it cures it then I'll clean the old carb and burn off the screen. If not then it'll have to be the progressive new clunk and lines approach followed perhaps by new oil seals on the crankcase <sigh>
..when they work they're great..
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