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| Valve Adjustment Hours? http://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=14147 |
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| Author: | Chico80x [ Mon Nov 29, 2010 9:53 pm ] |
| Post subject: | Valve Adjustment Hours? |
My dealer told me that I should check the valve clearance at 25 hours but looking through the Briggs factory service manual, I can't find anything on this. The manual says to check them at 100 hours instead so which one is it? Should I just check them at 25 to be safe and is the valve cover gasket reusable or do I need to get a new one? Thanks. |
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| Author: | DuckHunterF250 [ Mon Nov 29, 2010 9:54 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
i check mine everytime i change my oil. only takes a couple minutes and then u dont have to guess |
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| Author: | Chico80x [ Mon Nov 29, 2010 10:06 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
Do you reuse the gaskets? |
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| Author: | DuckHunterF250 [ Mon Nov 29, 2010 10:09 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
so far i have, but i carefully take the cover off and if the gasket tears any at all i will replace em. so far so good |
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| Author: | T-Bubba [ Mon Nov 29, 2010 10:30 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
at 67 hrs mine were off bad and had to be set |
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| Author: | WestEndAngler [ Mon Nov 29, 2010 10:38 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
167 hours and to be honest I have no clue if Gator-Tail has checked them I preform typical maintenance but have never checked myself hmmm might need to pop mine off and check. |
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| Author: | DuckHunterF250 [ Mon Nov 29, 2010 10:44 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
i bought a stock 35 in 09 and prolly put 30 to 40 hours on it when i had it, a friend of mine bought the whole rig and he has prolly put the same amount on it that i had. the valves had not been checked any since either of us had it, since then i checked the valves for him and they were off by more than 20 thousandths so i would advise to check them atleast every 25 hours or so |
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| Author: | deadbird8 [ Tue Nov 30, 2010 3:21 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Its good to check each time you change the oil. 10 hours on new motor after it breaks in and then at oil change every year. I have seen new motors from the factory that are off .020 from valve to valve. Do it every year before the season when you change oil and grease your drive. I have re-used the gaskets and have had my valve covers off at least 10 times. |
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| Author: | Brown Duck [ Tue Nov 30, 2010 7:38 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Is it a pretty easy job to adjust them on your own or do you have to take it in? |
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| Author: | Chico80x [ Tue Nov 30, 2010 8:33 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Adjusting valves is easy. All you need is a feeler gauge and some basic tools. |
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| Author: | Brown Duck [ Tue Nov 30, 2010 11:37 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
right on man im gonna have to check this one out when i get it and see what they look like |
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| Author: | quackconsumer [ Tue Nov 30, 2010 11:53 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Just make sure you check dem while @ 1/4" pass TDC. |
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| Author: | WestEndAngler [ Tue Nov 30, 2010 3:10 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
There is a YouTube video that shows you how to check your valves for anyone with not a lot of engine or mechanic experience if you can turn a wrench you can get it done... Here's the video, well one I just found doing a simple search... [youtube]http://www.youtube.com/watch?v=W2iDgU2RF3o[/youtube] |
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| Author: | take'emgator [ Tue Nov 30, 2010 3:16 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
There's no video |
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| Author: | MaXXis85 [ Tue Nov 30, 2010 3:20 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | take'emgator [ Tue Nov 30, 2010 3:49 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
TDC? |
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| Author: | quackconsumer [ Tue Nov 30, 2010 3:53 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | take'emgator [ Tue Nov 30, 2010 3:54 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
thats what i was thinking but wasn't sure thanks for the info, i'll need to pull mine and check them |
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| Author: | quackconsumer [ Tue Nov 30, 2010 4:01 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
I check mine every 25 hours and they usually need adjustin. |
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| Author: | deadbird8 [ Tue Nov 30, 2010 8:31 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | dpd [ Tue Nov 30, 2010 8:45 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | Chico80x [ Tue Nov 30, 2010 9:54 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
Right now I'm at 22 hours on a new engine so I am way overdue. So I will check my specs tomorrow and will post on the results but I'm sure I must be off by now. |
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| Author: | MaXXis85 [ Wed Dec 01, 2010 7:43 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Thanks DB8 I corrected my post. |
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| Author: | Chico80x [ Wed Dec 01, 2010 12:41 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
Just check my valve clearance and it was off on all valves by over .012. So for future reference for anyone reading this CHECK YOUR VALVE CLEARANCE ON A NEW MOTOR. I only have 22 hours on mine so I should've done this a lot sooner. Thanks for all of your help guys! |
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| Author: | retired and broke [ Wed Dec 01, 2010 1:16 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
Sure seems like a lot of valves are getting out of adjustment. So what happens to the local lawn service guy who puts on a bunch of hours a week on his commercial mower and doesn't even know about this and runs his mower for a couple of years and it runs just as good as it did when new. Of course he isn't turning a surface drive but he is turning at least three blades under that deck that will bring the rpms down just as bad as a surface drive if not more. And he is turning max rpms most of the time that mower is running. I know valve adjustment is critical but maybe aren't some of you doing a lil over kill or some of you might be reading the gauge wrong? |
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| Author: | quackconsumer [ Wed Dec 01, 2010 1:27 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | Chico80x [ Wed Dec 01, 2010 2:23 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
I just finished adjusting them and everything went fine. I did have to bump the motor over until the other valve was fully down. Is there any way to manually turn the Briggs 35HP over manually to set it at TDC? I had to bump the engine over quite a few times to get the rockers is the right position. |
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| Author: | retired and broke [ Wed Dec 01, 2010 2:43 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | quackconsumer [ Wed Dec 01, 2010 3:23 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
Engage da clutch and turn da prop by hand. |
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| Author: | Tenpoint [ Wed Dec 01, 2010 8:05 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | DuckHunterF250 [ Wed Dec 01, 2010 9:51 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | Chico80x [ Wed Dec 01, 2010 11:33 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | deadbird8 [ Thu Dec 02, 2010 8:21 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | dguidry [ Sat Dec 04, 2010 5:34 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
Just measured and set mine at .005. Had to bump starter to position rockers properly. Prop will not turn engine with clutch engaged. All were considerably off at 80 hours. GTR23. Result: much smoother start; engine purring now. |
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| Author: | cb5331 [ Sat Dec 04, 2010 9:23 pm ] |
| Post subject: | Re: Valve Adjustment Hours? |
I don't know how you guys are even getting close to the right position by bumping the starter... With the clutch engaged, you can most certainly turn the prop to spin the crankshaft. And if you can't figure out how to do it, remove the plastic cover and turn the flywheel. To set them right the motor needs to be in the right position. They can be set without the motor at tdc, but you need to know exactly what your doing, and from the looks of things, those doing this are learning and don't know. Just saying...Be careful and do it right. |
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| Author: | deadbird8 [ Sun Dec 05, 2010 4:20 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Agreed and good post- if you are having trouble moving the crank with the prop while in gear, then take out your spark plugs so you are not fighting the compression on the motor. Set the valves on the compression stroke (you can feel/hear the air coming out of the spark plug holes). |
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| Author: | dguidry [ Sun Dec 05, 2010 5:53 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Waiting for sunrise in my blind. Foward switch engaged, spin prop no engine does not. As I understand TDC is only necessary if you want to set boath rockers at once. If you want to do each individually all that is required is bumping motor till rocker has play in it. ???? Seems to be running just fine this morning... Maybe I just got lucky Woodies just landed in my spread |
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| Author: | deadbird8 [ Sun Dec 05, 2010 6:58 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | dguidry [ Sun Dec 05, 2010 7:01 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
| Author: | dguidry [ Mon Dec 06, 2010 6:23 am ] |
| Post subject: | Re: Valve Adjustment Hours? |
Engine idling and running just fine after my valve adjustment. However, I think I'm noticing that upon throttling up there is latency in rpm response as though starved for fuel. If I apply throttle more gradually no response latency. First, I think I need to make sure I did these valve adjustments properly, and if so, do I need to adjust carb too? |
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