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Old 27 August 2017, 17:20   #11
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yes water in vst ,and worth cleaning that fine gauze in there ,thought I had cracked it but just hoping on the battery low ,stoppingme from getting running ,but thinking I may be being optimistic , could water have got to injectors and caused issues ? ,pretty sure the plugs were wet with water on original removal
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Old 27 August 2017, 17:28   #12
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yes water in vst ,and worth cleaning that fine gauze in there ,thought I had cracked it but just hoping on the battery low ,stoppingme from getting running ,but thinking I may be being optimistic , could water have got to injectors and caused issues ? ,pretty sure the plugs were wet with water on original removal
yes water can cause issues with injectors but I would still expect it to run even if a little lumpy/rough.
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Old 28 August 2017, 08:21   #13
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Great help thanks guys ,charged battery to 13ish volts overnight and burst into life first crank this morning , did become a little more hopeful of this last night after you tubing a guy cleaning injectors , I come from a carburettor era and I wasn't even aware you needed 12 v to open the injectors up to allow them to pass fuel ,I reckon my battery must have been 11 or so volts even though it was cranking well ,did measure it but wasn't till an hour after I started charging as I couldn't find my meter and it was at 12.1 then,, thanks again
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Old 28 August 2017, 10:54   #14
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Good result


The battery is the heart of any modern engine, too much sensitive electrickery for their own good. It may well have be producing 12v 'off load' but as soon as you try to start the engine the voltage will drop too low.
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Old 28 August 2017, 12:33   #15
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Good result and learnt something myself re injectors any idea where the water came from? Or how it got there more to the point
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Old 28 August 2017, 16:30   #16
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Good result and learnt something myself re injectors any idea where the water came from? Or how it got there more to the point
I reckon the can style water separator was saturated ,and the under cowl separator was the same so the two filters had no choice but to pass water instead of fuel ,the Yamaha dash indicator flashed up a warning but being new to me I didn't know it existed but I had seen some unused coiled wires next to the tank side separator and assumed the warning was on all the time because it was disconnected ,when I later emptied the two filters into a pint glass (not to drink ) it had to be seen to be believed ,about 3mm of petrol on the top of an absolute glass of pee .
I found out about the voltage needed to open the injector after being told 45 per injector to clean ,I googled it and found an amazing method using an old tyre valve ,gluing the pipe to the dust cap from your tin of carb cleaner ,pushing the injector up the old tyre valve (valve removed ) ,fitting the dust back on the valve and other end of pipe into aerosol and happily spraying straight into the injector until it was clear ,but you had to apply 12v to open the injector before spraying
I thought it was priceless and I would love to put a link up but I don,t know how
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Old 28 August 2017, 16:48   #17
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Well done and a great result.Youve learnt loads. Its amazing what people have put on utube. We also have a f115. We bought a racor filter assembly with a glass water drain at the bottom. We only use 2 micron filters. from a company called asap. Injectors are the new carbs...fuel has to be spotless. As a matter of interest... was the filter in the VST tank clogged or dirty? And did the vst gasket reseal or did you need a new on? NIK
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Old 28 August 2017, 17:55   #18
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My concern would be how water is getting into the fuel. A complete drain of the fuel tank and an authorised mechanic would be the only thing to give myself piece of mind for the next time on the water.
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Old 29 August 2017, 16:52   #19
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Well done and a great result.Youve learnt loads. Its amazing what people have put on utube. We also have a f115. We bought a racor filter assembly with a glass water drain at the bottom. We only use 2 micron filters. from a company called asap. Injectors are the new carbs...fuel has to be spotless. As a matter of interest... was the filter in the VST tank clogged or dirty? And did the vst gasket reseal or did you need a new on? NIK
thanks ,sure did learn a few bits and pieces and was a great confidence booster after a corneal graft a couple of years ago ,its surprising how hard these things get with no 3d effect when you lose an eye ,so well happy and set up from help on this site , now to pass on a little ,,, yes I did this on sunday so no new gasket avail ,but yes I resealed existing gasket by careful cleaning with wd40 ,it is an o ring in a groove on the two halves of the vst ,could break if your unfortunate enough to stick to both halves , the filter in the vst is just a very fine flat mesh (plastic) and very delicate ,I used carb cleaner fired straight through the wrong way from an aerosol and it transformed from looking filmed to seeing the gauze so well worth doing
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Old 29 August 2017, 17:06   #20
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My concern would be how water is getting into the fuel. A complete drain of the fuel tank and an authorised mechanic would be the only thing to give myself piece of mind for the next time on the water.
Yes the easy solution is to run on a loose quicksilver tank at present while I collect enough containers to drain the 125 litres of knackered petrol that has laid undisturbed for several months hence the condition of it ,I should have known better however I was fooled by the fact the engine started first time every time until I hit the slip and the water and stirred it all up ,I wont be needing an authorised mechanic to tell me about the petrol and ethanol in boats debate . I would love to live without an inboard tank ,"awful things " but sometimes necessary
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