Post Number: 138
|Posted on Saturday, September 24, 2011 - 04:32 pm: ||
Had to get towed back to the ramp on our way back today.
Had the engine running well for our trip out to Towra[ over an hour]on Botany bay but on the way back the engine struggled to rev and died.
On trying to start her again i noticed the flywheel was hard to turn on waiting about fifteen minutes she started again and went for about 5 minutes before the same thing happened , we hitched a tow back to the ramp.
On getting the RubyToo home i made the following observations.
1, spark plugs where a white to light brown colour with absolutely no soot or oil on them.
2,Hardly any fuel and oil mixture came out of the sump drains, and what did come out was very thick and guey rather than the thin oil and petrol mixture.
3,there was no petrol in the carby drip tray, after a trip like today there would normally be at least a table spoon or more.
4, i had three kids on board who all sat up front changing the normal level of the boat.
After getting the boat home and washing her out i managed to get the engine started and ran it for fifteen minutes with out a problem.
Any ideas anyone?
Regards Matt and Ron.
Ps plugs are Champion L86C,
Post Number: 111
|Posted on Sunday, September 25, 2011 - 06:56 pm: ||
Matt, Sorry to hear of your problems. I was away over the weekend but would normally be more than happy to help out in such situations (towing etc). To me it seems that either your fuel/oil mix was too lean or your carby was tuned too lean. Assuming you are as fastidious about mixing your fuel as you are with care of the boat I'd suggest a problem with the carby that you may have cured already. Hope the apparent overheating has not done any lasting damage.
Post Number: 426
|Posted on Tuesday, September 27, 2011 - 03:01 pm: ||
Extra weight in the boat cause the boat to set deeper in the water working the engine a little harder then normal, there for running hotter maybe?
Could be just a matter of running fuel mixture a little richer when taking on more riders.
You would think if you ran it own the way out for a hour with no problems that the fuel mixture would have been set ok.
How about your spark timing do you recall where you had it set? This would make a difference in the temperature.