Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
 

News:

Visit the BlightWatch Maps


Author Topic: Engine problems on Briggs and Stratton  (Read 3783 times)

0 Members and 1 Guest are viewing this topic.

Andrew Burrow

  • New Member
  • *
  • Posts: 10
Engine problems on Briggs and Stratton
« on: March 05, 2010, 18:30 »
Hi

Does anyone have any expertise on Briggs and Stratton 3 HP model 80832 engines.

I cannot get mine to run for more than 30 seconds to a minute and then it cuts out. It needs to start on full throtle and with little or no choke despite low temperature.

I have tried adjusting needle valve and it will only start on 1/2 to 3/4 turn open.  Petrol tank has fuel and the fuel valve is open.

It used to start first full every spring not having been used since the previous spring. In Spring 2008 a friend borrowed it and the pull cable broke and they took it in to a dealer and had it serviced. I have not tried it since then and the above symptoms are the result.


Has anyone any ideas?. Thanks for any thoughts

Andrew


DavidT

  • Hero Member
  • *****
  • Location: Cwmbran
  • Posts: 2679
Re: Engine problems on Briggs and Stratton
« Reply #1 on: March 05, 2010, 19:12 »
Good evening Andrew and welcome to the site. Is the petrol fresh and have you checked the plug? Is it a 2 stroke or 4 stroke engine?

Andrew Burrow

  • New Member
  • *
  • Posts: 10
Re: Engine problems on Briggs and Stratton
« Reply #2 on: March 05, 2010, 19:18 »
Hi David


It is a 4 stroke and the petrol is fresh. Poured into an empty tank.

Kind regards

Andrew

DavidT

  • Hero Member
  • *****
  • Location: Cwmbran
  • Posts: 2679
Re: Engine problems on Briggs and Stratton
« Reply #3 on: March 05, 2010, 19:23 »
Is the oil fresh too?

Andrew Burrow

  • New Member
  • *
  • Posts: 10
Re: Engine problems on Briggs and Stratton
« Reply #4 on: March 05, 2010, 19:51 »
Hi David

It is 4 stroke so the oil is not a problem - it just lubricates. The spark plug is new. Mind you your previous comment made me think about dirty fuel. The tank was empty but could be the previous petrol evaporated leaving grease residue in the tiny outlet from the tank. I checked the air inlet to the tank and that is clear but it could be a partially clogged outlet. I will check that.

Kind regards

Andrew

DavidT

  • Hero Member
  • *****
  • Location: Cwmbran
  • Posts: 2679
Re: Engine problems on Briggs and Stratton
« Reply #5 on: March 05, 2010, 20:09 »
There could also be condensation in the tank, have you cleaned the filter? I would flush the petrol out and refill.

Andrew Burrow

  • New Member
  • *
  • Posts: 10
Re: Engine problems on Briggs and Stratton
« Reply #6 on: March 05, 2010, 20:26 »
Thnaks for that idea. I am not sure there is a filter. Which makes me think again

Andrew

Gwiz

  • Guest
Re: Engine problems on Briggs and Stratton
« Reply #7 on: March 07, 2010, 07:25 »
Hi,
Very often when petrol has been left in the fuel tank (and sometimes when it has evaporated) a residue is left on the small Gauze on the end of the pick up pipe inside the fuel tank, also if there is a diaphragm type of pump fitted, this can become "baggy" with age and stops working correctly.
From what you describe, it seems that you will need to remove the fuel tank and carb assembly from the machine and strip it to clean it out thoroughly.
I would suggest you replace any diaphragms and gaskets with original parts.

This might help,

http://www.briggsandstratton.com/eu/en/pdf/illustrated_parts_list/100/MS4030.pdf

« Last Edit: March 07, 2010, 07:29 by Gwiz »

Andrew Burrow

  • New Member
  • *
  • Posts: 10
Re: Engine problems on Briggs and Stratton
« Reply #8 on: March 07, 2010, 20:04 »
Hi

Many thanks for this thought, it seemed like the likely problem. Spent all of Sunday pulling entire fuel system apart including the carb. There was a gauze filter but no pump. Gravity fed and fuel definitely gets to the carb. Amazing amount of junk in the system and all got cleaned out. The net result is ..........no difference. The engine will fire but not run. I think I am going to get the fork out!

Andrew

Gwiz

  • Guest
Re: Engine problems on Briggs and Stratton
« Reply #9 on: March 08, 2010, 05:28 »
well, if you're sure it's not a fuel problem, then it must be the points/ condensor.

Andrew Burrow

  • New Member
  • *
  • Posts: 10
Re: Engine problems on Briggs and Stratton
« Reply #10 on: March 08, 2010, 08:21 »
Hi Gwiz

I still think it is a fuel problem because it will fire but not run. I just do not know enough about carburetors (yet) to solve it. There is some info from other that says that engines that will start but not run often have a root cause of a faulty diaphram. Cant find one of these in my carb but will see what info I can find on the net. My symptoms are just those of a faulty diaphram.

Thanks for your help

Kind regards

Andrew

smud6ie

  • Senior Member
  • ****
  • Location: Monmouthshire SE Wales
  • Posts: 531
Re: Engine problems on Briggs and Stratton
« Reply #11 on: March 08, 2010, 12:51 »
Hi, could you clarify a few points?
In first post your say it "runs for 30 sec to a minute" and the last post ,"fires and does not run",which is now the case and has anything changed since you stripped the carb?
Is the carb screwed directly to the tank or fed by a tube from the tank?
If the latter,is the float chamber held on by a single bolt,did you remove and clean the jets/emulsion tube in the carb?
Can you post a picture of the carb?
g8r

Gwiz

  • Guest
Re: Engine problems on Briggs and Stratton
« Reply #12 on: March 08, 2010, 13:52 »
Is there a little square plate on the side of the carb held on by (normally) 2 or more screws?
diaphragm behind it.

Slowgrind

  • Guest
Re: Engine problems on Briggs and Stratton
« Reply #13 on: March 08, 2010, 14:11 »
Is the exhaust clear I've had a similar problem with a mixer engine! Took the fuel line to peices plus umpteen other checks, turned out to be a blocked exhaust!

Andrew Burrow

  • New Member
  • *
  • Posts: 10
Re: Engine problems on Briggs and Stratton
« Reply #14 on: March 08, 2010, 20:03 »
Thank you for the thought. The exhaust is clear.

Kind regards

Andrew



FREE Allotment Garden Newsletter
Your Name:
Your Email:
Privacy/More Info
Share via twitter