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 Rally 12.5 horse Briggs

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redzz02
Doc Sprocket
Thunderdivine
1997 Murray
Jugghead90
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Jugghead90
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeSun Jan 05, 2014 9:36 pm

i have run into a problem on my mower and i need some advice/help my decompression value on my cam has broke. would it be easier to buy a new cam or replace my 12.5 briggs with a 18.5 briggs that i have on another mower? thanks for any help
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T-Dub13
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeMon Jan 06, 2014 1:01 pm

Paint job is fweekin' Killer!!!  cheers 
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Jugghead90
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeMon Jan 06, 2014 2:48 pm

thanks its been painted for a year or so has scratches and starting to fade thought about painting everything black or redoing the paint job that is on there

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matt-man
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeMon Jan 06, 2014 5:26 pm

I'm liking the build your doing, if you need any engine parts let me know I got a whole tub full
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Jugghead90
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeMon Jan 06, 2014 6:14 pm

I'm going to have to trade my 12.5 out for a 18 I got sitten in my shop Becuase my cam has broke.its the decompression value on the cam and I don't know how to fix it would it be easier to fix or trade it out for the other motor?
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Doc Sprocket
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeMon Jan 06, 2014 7:26 pm

@Jugghead90 wrote:
i have run into a problem on my mower and i need some advice/help my decompression value on my cam has broke.  would it  be easier to buy a new cam or replace my 12.5 briggs with a  18.5 briggs that i have on another mower? thanks for any help

Depends... For one with very little wrenching talent, it'd be easier to swap engines than camshafts. Also, if budget is a big concern, it is cheaper to put on an engine that you already have, rather than buy a camshaft.

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Jugghead90
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeMon Jan 06, 2014 9:24 pm

thanks thats what i thoought but i didnt know how hard it was to change them out? but i can pull themin my shop and swap them out sitten side beside. but i will try to get a new cam shaft when i get extrs money. just to have a extra motor. thanks for the advice and help
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Jugghead90
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeMon Jan 06, 2014 9:49 pm

how much will the 18.5 have horse help me from a 12.5? how much faster will that make it run?
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Creepycrawler
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeTue Jan 07, 2014 2:27 pm

motor wont make it go faster if you only change the motor, its the gearing that makes the top speed go up. acceleration will go up with a bigger motor but not top speed unless your motor cant pull the tractor in its fastest gear( usually 6th)
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Jugghead90
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PostSubject: Re: Rally 12.5 horse Briggs   Rally 12.5 horse Briggs - Page 2 Icon_minitimeTue Jan 07, 2014 2:33 pm

Alright thank you I don't want it go much faster so that will be good. I just didn't know if it would change the top soeed
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