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Hard starting Briggs & Stratton 3.0 hp lawnmower engine
On May 23, 7:00*pm, Vic Smith wrote:
On Sat, 23 May 2009 16:30:46 -0700 (PDT), muzician21 wrote: Have a B&S on a 70's era Snapper 21" pusher with an aluminum deck. I believe the engine is probably 10 years newer than the rest of the mower. Maybe 10 years ago I took it to a repair shop who installed a solid state unit to replace the points. Even with the solid state ignition it was never one-pull start, but as I recall it usually started with probably 3 - 5 pulls. 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. I'm in central Florida so it gets run bi-weekly or so during the rainy months, not at all during the months of what passes for a winter down here. I'm mechanically inclined but not well-versed on the theory of this kind of engine. I've had it broken down far enough to remove and flush the gas tank, change the points when it had points, replace the pull rope. I've change the spark plug of course. I know it should start much easier than it does. Any suggestions where to look, what to tweak? There isn't that much to it from what I can see, so it shouldn't be that difficult. I believe this mower has a lot of life left in it. Thanks for all input. Not familiar with this particular engine, but it sounds like a gas delivery/mixture problem. *Choking can be real critical with these. This is the first year I've had no problem starting my 2-cycle weedwacker because I've learned the primer bulb needs to be pumped up hard, the exact choke setting it likes, and that it has to be unchoked immediately upon firing. *Only took me 5 years, but I've got it starting in 3 pulls. I'd start by maybe looking in the carb for wetness, and trying 3 to 5 pulls at different choke settings. *But you have to let it dry out between tries so you're not confusing the issue. Once you know what works, you're all set. *Until it doesn't work any more. That's what I like about the Honda I have on my Craftsman. 3 horse I think, 4-cycle. It starts first pull after sitting all winter. *Every time for about 6 years now. *Original plug. And I never drain the gas or use a gas additive on anything. Not saying don't, just that I don't bother. --Vic If this is an older Briggs without a primer...they make an after--- market primer on a replacement gas cap. Stens.com should have it (they used to). It makes starting a snap. |
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