I ran my engine (2str 20HP yam) very briefly this morning is a bucket of water, to check I had fixed a problem and that the battery still had enough juice to turn it over.
It was running only for about 30 sec-1 min so as to cause minimal disturbance to the neighbours. I planned to run it for longer to drain out the carbs, and basically winterise it later in the day when I had finished tidying up. So it didn't get hot enough for the thermostat to open.
I left the prob in the bucket during the day. Bad mistake
. The water started to freeze by the time I got back to it. Now can't get engine to turnover. On turning the key the starter solenoid engages (click - and physically checked) but the motor doesn't spin. Pull start seemed very stiff so didn't persue this route as their seemed to be a problem. Battery is giving 12.6V at engine so don't think its as simple as that!
With kill cord pulled, and HT leads off - I can just
turn the prop in gear by hand (not sure how far - seemed very stiff so stopped). It turns fine in neutral.
So - anyone experienced this sort of issue? Whats best way to go about investigating/fixing? I am guessing that the water in the leg has frozen and is stopping something turning. It was probably -4C today and it was in the shade; by the time I spotted it had frozen the bucket had about 2-3 mm of ice on the surface. Could it be as simple as the water in impellor/pump is frozen and it can't turn - so everything is "locked". Or would you expect the drive shaft to still turn - in which case has the ice bent something serious?
What is the best way to defrost this - very quickly (e.g. hair drier/heat gun), quickly (ie. inside boat shed with a heater close by) quite quickly (ie. just inside the boat shed asap), slowly (ie. leave it outside to warm up with the environment/weather) - bearing in mind that it may get colder before it gets warmer.
Are there any critical tests you would suggest doing before trying to fire her up after defrosting?