There's only 40 ish hours on the powerhead Daniel.....but the rest if have engine was at 800hrs....it looks like three reed blocks were replaced when it was fitted (as the old ones were found to be chipped!?!... I have them here) of most concern is that one of the the 'new' ones has a chip, although it is an old one which has split causing the misfire....
Either way, I'm not impressed with them. After quite a but if reading I'm probably about to order two sets of these from the US. Good reviews and wouldn't cause damage if they fail.... Will have to run with the mercury replacements for now due to lead time (risk it?!?) and swap these out over winter.
The price difference is ridiculous! Just 135 usd per engine plus 20usd for gasket (90usd shipping etc)..... Compare that to £110 plus vat per set (6 of per engine) and £40 odd for gasket from Barrus!