Home |
Search |
Today's Posts |
#11
|
|||
|
|||
Hard starting Briggs & Stratton 3.0 hp lawnmower engine
muzician21 wrote: Now it takes probably 20 pulls or more and monkeying with the throttle. Once it fires it runs like a clock, runs up and down the speed range fine. It's also easier to re-start once it's been running - though still not one pull. Doesn't seem to use an inordinate amount of oil, no discernible smoke out the exhaust. It gets what I'd call moderate use. The issue is that the engine needs a rich mixture to start when cold. There are several different ways that the engine (carb) could be designed to do that. In your case it probably has a choke. If it was the original 30 year old engine the choke would probably be part of the throttle control. The procedure for starting the engine would be to set the throttle to the start position and then when the engine started you would move the throttle control lever to the run position. On this design the throttle cable was mechanically linked to the choke plate. Sometime in the 80's they changed that to an automatic choke where a spring closed the choke plate and then a diaphragm used engine vacuum to pull the choke open once it started. On newer engines there is also the system that eliminates the choke completely and replaced it with a primer bulb where you pump a little gas (others have described the process). So the first thing you need to do is identify which method it uses to deliver extra gas on cold starts and then figure out why it is not working as designed. -jim |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
5.5 HP Briggs & Stratton Mower Engine Soaks Air Filter with Gas When Running | Lawns | |||
starting a briggs + stratton choke engine | United Kingdom | |||
Briggs & Stratton 16 HP engine-points actuating rod not moving enough ? | Lawns | |||
Briggs & Stratton Replacement Engines vs rebuilding existing engine | Lawns | |||
FS: 11 hp Briggs & Stratton engine - SOLD | North Carolina |