Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

It's in decent condition, new rubber impeller, scraper bar and overall good shape. The guy I bought it from said it had been professionally serviced 2 years ago but had seen little use since then as he decided to hire a plow guy to do his average residential driveway. I could not get it to start after adding some fresh fuel that I brought with me so I offered him $ 40.00 and said OK. - he had it listed for $ 75.00 on CL. I'm pretty sure he left some old, unstabilized fuel in there and it turned into varnish.

I removed the top and back covers and dropped the fuel bowl. It looked like a bad batch of applesauce in there so I cleaned it out and shot the carb with carb cleaner and reinstalled the bowl. It fired up for a few seconds and then died. A good carb cleaning appears to be in order and I'm wondering if I can do this with the carb installed or is it easier/better to remove it from the engine (Suzuki 47P)? I've never removed a carb before but am mechanically inclined and would like to get this operational for next winter.

I remember Borat discussing a cleaning of the jets using wires to remove any build up inside that could cause fuel starvation. I have never done this so any suggestions or tips will be very much appreciated.

I've never had a carb yet that had to have the float needle seat replaced or repaired.   Usually, the float needle would be the source of the problem and even that's a rarity.   Sometimes the float needle would corrode slightly and develop a bit of pitting or a faint recession in the area where it would seat.   Even on 40 year old carburetors it was rare to anything but clean the needle and seat. 

This problem that Frank is having is perplexing to say the least. 

A bit of measurable success to report! I took apart the float and needle and poked and prodded with a paper clip, dental pick and pressed into the seat using an 8 penny nail head (seemed to be about the right size). Hosed it all down from both directions (needle and fuel inlet sides) and reassembled the whole enchilada. I removed the drain screw to ensure a flow of fuel into the bowl (eureka!) and fired her up.

She ran without any assistance from me (i.e. spraying fuel into the throat) for close to a minute. I fired her up again and she ran up and down, high revs then slower revs, kind of elliptical in sound with the higher revs being more prominent. I could get it to even out a bit by gently and sparingly using the primer bulb to feed fuel into the throat. I can't get it to even out and run smoothly unless I use the primer.

This is the most headway I've made in quite some time and feel like a real fix is just within reach -  I needed a little bit of encouragement at this stage of the game. I'm leaning towards the carb being starved of fuel a bit and perhaps a little more attention to the needle seat is required? Any suggestions on where to go from here?

   Congradulations, you're just about there.  What you've described is very good and what I get when I miss some specs.  The varnish in the photos looked lumpy in spots and a brown coating in others which is tough to fully remove from areas you can't directly poke.  More of the same cleaning should get it. 

   It could be the float is off but more likely just some spec's somewhere.   Drain the bowl and check for specs.  If there are then may be just dumping those will work.  

   What did you set the top screw to?  I think it's 1 or 1 1/2 out from gently closed.  You could try backing that out to 2 and see what happens.  If it needs more than that something is wrong.  Actually 2 would indicate somethings wrong but you'd be very close.

  If no specs or the needle adjust does not work then another round of cleaning.  Make sure you have a good flow from the bowl drain.   Focus on the main jet and emulsion tube.  Be gently in the seat area.

ALSO.... Sometimes it takes a few minutes of warmup for it to run smooth but if you're getting wide throbbing then likely dirt.  It could clear by itself with several minutes of running.

Top screw - is that the one with the spring around the threads? I made some adjustments with that one just now and it did not seem to make a difference. The engine sounds like it's hunting - revs up then down, up then down. I can smooth it out agian by gently and sparingly using the primer bulb. I almost hate to mess with the needle seat again. What do you think?

Sounds like restricted fuel flow into the main jet.  As Trouts says, pull the carb, inspect for dirt, pull the main jet and emulsion tube and clean again.  You'd be wise to put a small in line fuel filter between tank and carb.   You should clean the float needle seat some more and blow through it with compressed air.   Eliminating dirt from the fuel and carb is essential. 

I've replace the fuel filter twice. The main jet and nozzle are clean and good to go. I'll get into the needle seat area and give it the once over again.

Let this be a lesson to those who let their carbs go to hell in a hand basket - keep your carb clean and your fuel fresh!!!

I keep seeing pictures of this float thinking  it's installed upside-Down... Does anyone else see this problem?

Friiy

friiy wrote:
Doesn't look like it would fit any other way.  If reversed, it would conflict with the black plastic collar and I doubt that it would be able to move through it's arc. 

Please try it it for me...  This post is too long too read...   :(

Troll-Friiy

Maybe I am wrong...IT just doen't look right..

Friiy