woops

[DJENAN]

my mate took his boat out the other day and mixed his oil and petrol wrong, instead of 50:1 he did it 30:1 somehow and used about 15 litres os the mix before noticing , would this have done damage? as it still runs fine and compression is still good

 

[andrewkafp]

Re: woops

30:1 is way better than 70:1 or 100:1 or NONE as it is more oil rather than less. It will do no harm. Just be a bit smokey. If you continue to run it like this, it will carbon up sooner.<br />New outboards used to begin with 25:1 ratio until run in and then decrease to 50:1 (trivia)

 

[DJENAN]

Re: woops

SORRY i got those ratios wrong, all i know is he added 300ml of oil to 22 litres of fuel, is that bad? dont know what the ratios would work out to

 

[andrewkafp]

Re: woops

He made the ratio 73.5 :1<br />To 22 litres, he should add 440ml<br />300ml for 22 lites = 22,00ml /300ml = 73.3<br />22,000ml /440ml =50.0<br /><br />Check here.<br /> http://www.tohatsu.com/tech_info/oil_gas.html <br /><br />Probably a USA 6 gallon tank 22.7 L where you add 460ml<br />5 litres - add 100ml<br />10 litres - 200ml<br />20 lites - 400 ml<br /><br />Get a clear plastic container and mark these amounts on the side. That way he only has to add petrol and pour in the required qty for the amount.<br />Works for me.<br />I don't think much damage would have been done.<br />Was there stabilser added, coz it has a small amount of upper cylinder lubricant which would have helped ?

 

[DJENAN]

Re: woops

thanks for the info, he didnt run stabliser but it seems to run ok..he was very lucky, as his miscalculated how much oil to pour out of a 1 litre bottle with those crappy markings. better to do what u suggested!!

 

[grandx]

Re: woops

I think the NMMA TCW 3 test includes running outboards at 100:1 for 100 hours. To pass the test, the cylinders must be free of scuffing. So... if your mate was running TCW 3 oil at 73:1 for just a short time he is likely OK, compression test confirms no severe damage. Good Luck.

 

[rodbolt]

Re: woops

Hello<br /> at 73/1 and no real hard use it probably is not hurt. one of my customers got mixed up on a motor I sold him, a rebuilt 89 model evinrude 88spl. he thouhgt he was supposed to finnish the breakin at 50/1 then switch to 100/1. he ran it like that for a year and I only found out about it because the caretaker at the hunt club called me after arguing with him so good luck and keep posting and remember sometimes blind luck is way better than pure skill