View Full Version : YS50ST
jimidege
06-03-2007, 08:47 AM
Has any one encountered "Hydro-lock" problems with these motors, and how did you stop it? THANKS for your opinions. :?:
BarracudaHockey
06-03-2007, 09:16 AM
Clamp the fuel line while its sitting still and make sure you relieve the pressure from the tank as soon as you shut down.
jimidege
06-03-2007, 01:12 PM
Has any one encountered "Hydro-lock" problems with these motors, and how did you stop it? THANKS for your opinions. :?:I do clamp the fuel line down and relieve the pressure but by the time it spools down, its usually locked up.
RPM 1.5
06-03-2007, 07:25 PM
I can't even get mine to get enough head speed to go into hover,changed everything you could think of, even tank lines and check value sending to YS to have them look at it and YEs we set needles to factory settings and played with them in everyway
Ray :arggg: :arggg:
BarracudaHockey
06-04-2007, 11:06 AM
Then set it to an idle, the blades should stop, clamp the fuel line to kill the motor.
DavidH
06-04-2007, 03:30 PM
Only time I have had a YS hydro lock is when the regulator is not functioning as it should. If the lever working the regulator is hanging the regulator open. Then this will allow fuel to flow thru the carb. Sounds to me like that is what is happening.
When I ran the YS engines it was really not even nessecary to use a cut off in the fuel line. If the regulator is functioning correctly. It will not allow fuel to flow to the carb except when demanded. Even pressurized tank will not cause fuel to flow if the regulator is functioning correctly.
David
jimidege
06-04-2007, 03:35 PM
Then set it to an idle, the blades should stop, clamp the fuel line to kill the motor.Thanks this works just great,do you think a perry pump would also solve the problem?
DavidH
06-05-2007, 08:21 AM
The YS does not need a pump of any kind. It is a pressurized closed loop fuel system. The line from the backplate pressurizes the fuel tank. The check valve controls how much pressure is maintained in the tank. The regulator on the engine controls the fuel flow to the carb.
A pump would not be as efficient as the pressurized fuel system.
David
jimidege
06-05-2007, 11:51 AM
Is it hard to fix this regulator Problem? This motor is brand new, Ive ran about a half gallon of fuel through it.
DavidH
06-05-2007, 07:53 PM
It could be a hole in the diaphram. The regulator is fairly simple. It is only a couple of parts. A plunger and the diaphram.
Don't know if the parts for the regulator on the 50 are the same as the 60 and 91.
David