I've developed a mistrust in anyone who proclaims to be a mechanic, oh no wait sorry, they're ENGINEERS these days aren't they. So as per the BMW, KTM and Yamaha, no-one touches the boat engines except me from now on, unless it's work I physically can't do myself. (They're big heavy fuckers - 250 kg each).
We were getting Engine Overheat alarms - armed with an eBay diagnostic cable and software package, and a replacement ECU as the previous one had fried, I set about it. First of all I learnt that it wasn't the engines overheating but the ECU itself, which is water-cooled, except there was no water flow. Which is why the previous one fried!
Eventually traced it a block in a cooling coil in the fuel vapour separator - the ECU cooling water exits through here to cool the fuel down.
Had I left it to the local dealer, he would have gone "oh boss ECU too hot make buyings new ECU" for GBP 2k - seriously I'm so fucked off with these idiots telling me WHAT is wrong without making any effort to work out WHY it's wrong, and never fixing, just replacing.
As it was the replacement secondhand ECU (the previous one had fried the starting circuit, so the engine wasn't.........ah work it out) for a couple of hundred quid and a few hours of my time, and we should be good to go.
I also challenge any local mechani..........ENGINEER to go so full retard on diagnosis that he removes all the engine covers and cooling pipework so he can give each part mouth-to-mouth to see where the blockage is
