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Briggs 446777 Engine, Low Oil Shut Off


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  #31  
Old 10-17-2017, 09:22:06 AM
uglyblue66 uglyblue66 is offline
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Default Re: Briggs 446777 Engine, Low Oil Shut Off

about 150 ft. I mow it in both directions so the machine is running both ways at a angle.
I mowed a half acre yesterday and it used some oil.But there was NO smoke,no leaks. Strange.
If it uses oil I will just check it each use I guess. If the rings weren't seated I can understand some usage.
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Old 10-17-2017, 08:39:06 PM
gdstew gdstew is offline
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Default Re: Briggs 446777 Engine, Low Oil Shut Off

It will use a little oil every time until it warms up to operating temperature. That aluminum really expands! Check the oil every time you start it up!
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Old 12-07-2017, 07:13:15 PM
uglyblue66 uglyblue66 is offline
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Default Re: Briggs 446777 Engine, Low Oil Shut Off

Well It had about 3.5 hours on it so i changed break in oil today just so I would know it was done and not forget about it. I must say,the engine seems to have more power than it ever did.Plows right thru leaves and stuff that last year it would bog down and I would have slow down.
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Old 11-24-2018, 10:11:51 PM
uglyblue66 uglyblue66 is offline
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Default Re: Briggs 446777 Engine, Low Oil Shut Off

All summer this machine has given little problems at all until a couple weeks ago.It is hard to start as in does not want to turn over easy even with a jumpstart, and seems to be missing on 1 cylinder.it runs on it but not as well as the other.. I wound up taking something else and later that day it fired right up when it was warmer.
Will the straight 30 wieght oil affect starting in cold weather that noticably?
I am thinking of replacing plugs first for the skip and then check valve clearances,if that aint the problem,then the coils.
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  #35  
Old 02-15-2019, 06:25:19 PM
uglyblue66 uglyblue66 is offline
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Default Re: Briggs 446777 Engine, Low Oil Shut Off

Well I have the machine in the shop and I have the shroud off.I took the kill wires loose from the coils and it runs equally well on each cylinder with 1 spark plug unhooked. Near equal compression, new plugs.
So I thought,"well diodes will fix this!"
Well I have got to where I recheck behind myself and I decided to remove the heat shrink and check the diodes. They both test good. So Hum. Not to sure of myself here.
I had already decided to clean the carb again but once i pulled those kill wires and it runs correctly, I knew the issue must be in the ignition cut off system somewhere.
So question is, And I should know this but I am asking for knowledge,can a diode be bad intermitantly?
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  #36  
Old Yesterday, 03:16:57 PM
uglyblue66 uglyblue66 is offline
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Default Re: Briggs 446777 Engine, Low Oil Shut Off

Well putting in new diodes did NOT change anything. I just went and checked the low oil switch,unhooked it with the kill wires connected,no change,does not run on but 1 cylinder until the kill wires are unhooked.
I replaced the tiny 1 amp diodes with much larger diodes and put a much larger peice of heat shrink around everything.But it will not run on both with the kill hooked up. I have a diagram here and of course the kill wire goes thru the lever safety switches, pto switch,and key switch.BUT it is just 1 wire.I can't see how even if there was a short in the kill circut how it would only kill 1 coil.
So I am leaning towards bad coil.I will be cleaning the carb also just for good measure.

Last edited by uglyblue66; Yesterday at 03:45:41 PM.
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