SeaHuffKing Posted April 23, 2014 Share Posted April 23, 2014 Hi all, Because of my job, I don't get to use my boat for periods of 2 months or so. What I am wondering is, the last time I use it before this period, should I disconnect the fuel line while flushing and run it till it stops (running it dry to prevent fuel destabilizing in the motor) or did i read somewhere that running fuel injected outboards dry is bad for the injectors? Link to comment Share on other sites More sharing options...
Geoff Posted April 23, 2014 Share Posted April 23, 2014 Is the motor a 2s or 4s. Either way , two months or even three will not be a problem with fuel. In respect to the injectors , have you spoken with the motor manufacture / agent to obtain their comments?? Geoff Link to comment Share on other sites More sharing options...
pjbink Posted April 23, 2014 Share Posted April 23, 2014 Just use a fuel stabiliser the last time you run it. Running dry can cause major problems with DI 2 stroke engines like the Optimax. It can also cause severe oiling up problems with oil injected motors (depending on the system of operation). There is a theory it can also cause premature wear problems in engines where the oil is mixed with the fuel (again 2 strokes). The latter might be possible if there are multiple carbs or injectors. Ie should be OK to do it with a single carb 2s. I'm not sure about 4 strokes but I wouldn't risk it unless I was 100% sure, ie had confirmation from the manufacturer. Link to comment Share on other sites More sharing options...
Linc Posted April 23, 2014 Share Posted April 23, 2014 As mentioned above, if you are worried, add a stabiliser. And whatever you do, don't use ethanol fuel Link to comment Share on other sites More sharing options...
squidboy Posted April 23, 2014 Share Posted April 23, 2014 What is fuel stabilizer made of? Link to comment Share on other sites More sharing options...
Linc Posted April 23, 2014 Share Posted April 23, 2014 Fuel AdditivesPrimary Ingredient ISOPROPANOL- removes waterPrimary Ingredient CAS 67630Secondary Ingredient STODDARD SOLVENT cleansSecondary Ingredient CAS 8052413Tertiary Ingredient 1,2,4-TRIMETHYLBENZENE another solvent Link to comment Share on other sites More sharing options...
squidboy Posted April 24, 2014 Share Posted April 24, 2014 Ok sounds good, but what would the effects of the solvent do to two stroke premixed fuels, if any? Link to comment Share on other sites More sharing options...
Linc Posted April 24, 2014 Share Posted April 24, 2014 Apparently it's fine with 2 stroke mixed fuel. I've not personally used it but done a lot of reading about it recently. If no more than 2-3 months most sources say don't bother wasting the money since, especially with 2 stroke, it takes years for the duel to separate. But it won't do any harm to add it if worried. Link to comment Share on other sites More sharing options...
SeaHuffKing Posted April 24, 2014 Author Share Posted April 24, 2014 The motors are EFI 4 stokes, I think your right , for that amount of time 2-3 months, the fuel is going to be ok, or add fuel stabilizer if still concerned. Link to comment Share on other sites More sharing options...
pjbink Posted April 24, 2014 Share Posted April 24, 2014 Or you can run it at home for 5 -10 min with fresh fuel every 6 weeks.3 months is a bit long to leave the same fuel in it. The problem is that the fuel degrades and leaves gums and varnishes which can create havoc with injectors and carburetors. Link to comment Share on other sites More sharing options...
union man Posted August 9, 2015 Share Posted August 9, 2015 Stabil can't hurt! Link to comment Share on other sites More sharing options...
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