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#Post#: 13--------------------------------------------------
Briggs and Stratton 16.5HP OHV starting troubles
By: IndyDude Date: September 28, 2014, 1:41 pm
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I recently traded a handgun for a Craftsman riding lawn mower.
The guy I got it from told me it was a little hard to start, but
if you rotated the engine past the compression cycle that it
usually starts right up. He was correct in that part.
After reading online, I found that there are a few things that
cause high compression on these engines, so I initially adjusted
the valves and that actually seemed like it solved my problem.
Now, a few weeks later, I have run into the very same issue
where it is hard to start. I thought that it is possible that
the valves have gone out of adjustment, so I looked at that
again. Upon further searching, I found that some directions
online for adjusting the valves are inaccurate. The big
discrepancy is they say to rotate the engine 1/4" past TDC, when
actually it is to rotate the engine where the piston moves down
1/4" past top dead center. Once I got that cleared up I was
hoping it would start....nope!
I then found that it is possible that the compression release
mechanism on the cam shaft could be faulty. After rotating the
engine while viewing the rockers and valves, I can clearly see
when the cam is rotated over the compression release, as the
bottom valve slightly opens then closes, so I know that part of
the system is in place and functional.
The next thing I read is that there can be carbon build-up on
the head which could cause higher compression than normal. I
pulled the head and inspected it. It really wasn't that bad, but
I did clean off what bit of carbon was present.
I see that the starter has been replaced and seems to be one of
the newest parts to the engine, but I am actually thinking that
there may be a few coils inside that have heated up and thus
isn't producing as much torque as necessary to rotate this bad
boy. I did pull it off and disassembled it. I really couldn't
see anything wrong, but it did appear that some of the coating
was melted off of some of the coils. The brushes and everything
else inside looked to be in really good shape.
From everything I have read thus far. I think it is the starter
and if I replace it that should solve my problems.
Anyone else have any ideas as to my trouble?
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