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Author Topic: help/advice needed for briggs 8.5hp engine  (Read 3116 times)

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Offline mark blundell

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help/advice needed for briggs 8.5hp engine
« on: September 14, 2014, 02:51:45 pm »
Hi all i am after some help setting up a briggs and stratton 8.5hp l/c engine,

Its not for a racing mower its for a Toylander i am building for my son im not finished yet but on test drive what i am finding is that when he gives it full throttle then comes off the throttle the engine cuts out someone said about removing the governor but how would i then set up the carb??

also is it a big job to remove the governor?

also could i fit a motorbike carb would this work? i have seen the racing carbs but really don't want that expense.

Thanks in advance for any help as this is very new to me also here is a picture of what i am building



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Offline cycloneracer

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Re: help/advice needed for briggs 8.5hp engine
« Reply #1 on: September 14, 2014, 03:18:51 pm »
Judging the size of the unit and the size of your son.  I'd leave the governor on and leave the stock carb.   Leaving it stock will make it safer and the engine will last much longer. 

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Paul Krueger

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Offline mark blundell

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Re: help/advice needed for briggs 8.5hp engine
« Reply #2 on: September 15, 2014, 03:04:14 pm »
Yeah i would much rather leave it stock but where he is so young he is constantly on and off the throttle and every time he accelerates and he comes off it quick it cuts out?

Is there any easy fix for this

Regards Mark
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Offline Huffy044

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Re: help/advice needed for briggs 8.5hp engine
« Reply #3 on: September 16, 2014, 11:12:12 am »
I dont d stock very well but I'm guessing carb. The one you have is a terrible excuse, find a ral one with abowl.
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Offline chavez

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Re: help/advice needed for briggs 8.5hp engine
« Reply #4 on: September 16, 2014, 01:08:41 pm »
When you say cuts out off the throttle, are you referring to it just dies after that point, or that it falls on it's face next time into the throttle?
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Offline mark blundell

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Re: help/advice needed for briggs 8.5hp engine
« Reply #5 on: September 16, 2014, 02:16:01 pm »
yeah it just cuts out the engine dies and has to be started again

sorry for the stupid question but i'm not up on mowers RAL? what is that

thanks Mark
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Offline cycloneracer

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Re: help/advice needed for briggs 8.5hp engine
« Reply #6 on: September 16, 2014, 05:31:58 pm »
Adjust the idle.   Probably too low. 
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Paul Krueger

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Offline chavez

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Re: help/advice needed for briggs 8.5hp engine
« Reply #7 on: September 16, 2014, 06:22:39 pm »
Looks like you possibly still have the factory choke linkage in place, could it be choking the engine at wot and flooding it out?
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Offline Huffy044

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Re: help/advice needed for briggs 8.5hp engine
« Reply #8 on: September 16, 2014, 08:19:04 pm »
Sorry ral should have been "real" was poking fun at the carb you have
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Offline mark blundell

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Re: help/advice needed for briggs 8.5hp engine
« Reply #9 on: September 17, 2014, 01:49:45 pm »
i will try the idle but i will need to get new springs for the clutch first, yeah the choke linkage is still in place at the moment but it doesn't push the choke when on full throttle.


Thanks for all the help i will have a tinker at the weekend and update

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