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#1
04-25-2012, 12:07 PM
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Hydro affecting starting??
Guys, I took my 149 to a buddy to take a look at my engine because it never wanted to start with out starter fluid. After it was running it continued to run fine with with good power. We ended up working on the valves as they weren't closing properly and he thought that was why it would loose enough vacuum so it wouldn't start right. Also we only had about 25 pounds of compression in the cylinder. He thought it should be higher. (The rings are good.) Now, he said he tried to start it and it wanted to drive away from him. (first time this has happened).
He and I were wondering if something with the hydro unit could not be disengaging properly and drawing power when trying to start the engine? The trans seems to work fine. Thanks, Mark 
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#3
04-25-2012, 04:11 PM
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I'm not really sure what you mean, could you be more specific? I dont think he had the brake set though. He did say when he tried to stop it with the foot brake it didn't want to stop. Thanks, Mark
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#4
04-25-2012, 04:39 PM
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Did your Cub wanted to drive away before you and your buddy work on the engine?
The pump does not disencage when you try to start it. You have to have a clutch from a manual trans Cub to disengage the hydro trans. As stated in a different post the hydro linkage needs adjusted. Quote:
What else was change if the rings were recently change ?
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#6
04-26-2012, 09:13 AM
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Do any of you guys ever experience your hydro cub wanting to get away from you when starting? Is this maybe a problem that is common? Just wondering. He was wondering if that would slow down the starter a little or make it more difficult for the engine to start? And thanks about the auto comp release, I hadn't known about that. Thanks, mark
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#7
04-26-2012, 09:23 AM
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I have experienced some creep with my tractors - shouldn't burden the engine so much that it wouldn't start easily. If it's more than creep, I would say that your hydro linkage is definately out of adjustment. If it is still trying to creep with the brake pedal depressed, you need to adjust your cam bracket. This procedure can be found in the service manual for your tractor in the technical section.
http://ccmanuals.info/pdf/1x8-9%20&%...e%20Manual.pdf Cam bracket adjustment is on pg. 2-57 (pg. 80 in the pdf.)
__________________
CCC 784 w/ Triple Hydraulics IH 982 Cub Cadet Commercial H1748 Walk-Behind 50C Deck 42" Hydraulic Angle Front Blade 41" IH Rear Blade QA42A Snowthrower
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#8
04-26-2012, 08:30 PM
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I have a 125 ( 12 hp hydro ). If the engine isn't tuned properly, I have a difficult time starting it. Properly tuned it fires right off.
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#9
04-26-2012, 09:44 PM
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hydro hard starting
you may want to get a manual ,and go through the adjustments ,,as for the low compression ,it wont show very good ,because of the c/r ,holds the exhaust valve stays open till you reach 600 rpm ,thats where the low compression comes in ,however 25 is low ,,if you want a true test ,roll the engine over back wards ,and that will tell you whats going on ,now if your c/r spring is bad ,or broke ,it will be hard to start ,but you will have good compression . there is also a tab on the c/r that holds the exhaust open from .030 to .o43 ,this should be right ,.the only way to check thids is to remove the head ,and use a dial . gope this helps . David
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