- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
Any lawnmower repair baws in the house?
Posted on 6/12/19 at 1:55 pm
Posted on 6/12/19 at 1:55 pm
Have an older model 21" deck Craftsman with a 4.5HP B&S motor and it's been having a lot of issues lately with staying running. Took off the air filter and it ran just fine, but once the air filter gets close enough, it will die immediately.
I've taken apart and cleaned the carb with carb cleaner, changed out the gas, put new oil in it, swapped out the spark plug and when it starts, it'll remain running with a crapload of white smoke. Then after a minute or so, it will slowly rev down and then kill.
Any ideas what else I could try? TIA
I've taken apart and cleaned the carb with carb cleaner, changed out the gas, put new oil in it, swapped out the spark plug and when it starts, it'll remain running with a crapload of white smoke. Then after a minute or so, it will slowly rev down and then kill.
Any ideas what else I could try? TIA
3
Posted on 6/12/19 at 2:11 pm to idlewatcher
Install a new carb and I bet it runs fine. Many of these carbs just don’t function well with cleaning or rebuilding and new replacement carbs are usually cheap. That’s been my experience over the years. I’ll clean the carb once, if it doesn’t correct the problem, then a new carb goes on.
Posted on 6/12/19 at 2:14 pm to idlewatcher
did you change your air filter? If not the carb will suck oil from the crankcase. Try disconnecting the tube under the filter housing and see if it still does it.
Posted on 6/12/19 at 2:54 pm to idlewatcher
Either the air filter is extremely clogged up, the choke is stuck closed or the float is stuck open. Check the choke and if that’s good, clean or replace the carb
Posted on 6/12/19 at 3:08 pm to CrawDude
quote:
Install a new carb and I bet it runs fine. Many of these carbs just don’t function well with cleaning or rebuilding and new replacement carbs are usually cheap. That’s been my experience over the years. I’ll clean the carb once, if it doesn’t correct the problem, then a new carb goes on.
this ^^^^^^
whats happening is the air filter provides a restriction so its sucking too much gas in and that raw gas burning is the smoke you are seeing.
small chance its a bad air filter not letting air through it but its gonna be the carb.
you can buy a new carb for it for about $10 which is only $5 more then a carb kit costs to clean and rebuild that carb, its just pointless to try unless you just like tinkering with stuff
This post was edited on 6/12/19 at 3:09 pm
Posted on 6/13/19 at 4:12 pm to Bedhog
quote:
did you change your air filter?
Sorry for the delay in response guys.
Yea, brand new filter is on there as well.
Previous poster said maybe swamp out the carb for a new one. All the videos I've seen on my exact motor seem to make it work once the carb is cleaned.
I'm admittedly a novice with lawnmowers
Posted on 6/13/19 at 4:13 pm to sleepytime
quote:
Either the air filter is extremely clogged up, the choke is stuck closed or the float is stuck open. Check the choke and if that’s good, clean or replace the carb
I do believe that may be part of the problem. The screw that goes through the air filter into the carb housing (?) is difficult to get in there even after it was cleaned.
I did read something about a needle valve getting gunked up and that not allowing the engine to fire properly. Do all mowers have needle valves?
Posted on 6/14/19 at 12:51 am to idlewatcher
ahhh...If you cleaned the carb and didn't check the needle valve...that may be the problem. I'm in the buy a new one camp.
This post was edited on 6/14/19 at 12:55 am
Page 1 of 1
Back to top
Follow TigerDroppings for LSU Football News