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Charlie(IA) 
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Joined: 17 Sep 2009
Location: Iowa
Points: 4
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 Topic: warmed up WD45 loses power
Posted: 09 Feb 2010 at 11:43am |
Poor ol' gal... She's seen a lot of use... and I'm ashamed to admit, some neglect.
I noticed a radiator leak late this fall... stop leak fixed it fer now.
Now though, once she warms up, she starts to die under load... If I slow her down to idle she'll keep running and then can take off again for a little bit... then she'll start to kill again under load (pushing snow with an oxnard blade)...
It's almost like a fuel starvation problem... that's the first thing I'm gonna check. Did notice the carb icing up a bit, but I'm used to that and so is she... I know the float is sticking and not shutting off fuel flow to carb... and I don't think it's sticking closed so as not to allow fuel flow...
Any other thoughts? It's a WD with some other engine in it... a CA maybe... I haven't yet found the engine serial number (at least not where it's supposed to be).
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Brian Jasper co. Ia
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Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508
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Posted: 09 Feb 2010 at 12:48pm |
Check to make sure you have good fuel flow to the carb. Does pulling the choke out help for a little bit before it wants to die? Junk in the tank blocking off the fuel flow could be what's going on.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Lil bull
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Joined: 29 Oct 2009
Location: Ohio
Points: 1
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Posted: 09 Feb 2010 at 1:02pm |
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I had the same problem on Sat. while trying to push snow. Had to run the choke completely closed just to get it to the shop. I pulled the carb off and cleaned it inside and out and now it runs great. Had crud in the carb so I am assuming it was blocking an internal passage.
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Bill Long
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Joined: 12 Sep 2009
Location: Bel Air, MD
Points: 4556
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Posted: 09 Feb 2010 at 4:20pm |
Don't forget to check the flow from the gas tank. We had a B with a rag in the tank that stopped from time to time when the rag restricted the gas flow to the carb. Also, you may want to check the settlement bowl for restricted flow there too.
Good Luck!
Bill Long
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CTuckerNWIL
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Joined: 11 Sep 2009
Location: NW Illinois
Points: 22823
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Posted: 09 Feb 2010 at 4:50pm |
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Icing on the carb can cause those symptoms. I made a shield out of some scrap tin to put from the frame rail to the hood to hold some heat in around the carb and it helps. If you let it idle till some heat builds up in the manifold that will help reduce the icing also. The faster the engine runs the more the carb will ice up.
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jrjuday
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Joined: 12 Sep 2009
Location: n.e. indiana
Points: 119
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Posted: 09 Feb 2010 at 7:58pm |
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Condensor.
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J D (Ont)
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Joined: 16 Dec 2009
Location: Ontario
Points: 13
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Posted: 09 Feb 2010 at 8:33pm |
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The choke plate in my WD45 came loose from the linkage once and was partly on when I thought it was off. Did something similar to what you describe.
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7368
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Posted: 09 Feb 2010 at 9:29pm |
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I would have to say fuel restriction. My D14 had the same problem in the summer. I found a ladybug in the outlet of the strainer.
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Dave(inMA)
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Joined: 12 Sep 2009
Location: Grafton, MA
Points: 2398
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Posted: 10 Feb 2010 at 6:27am |
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Had a similar issue on one of my tractors. Though it should have had nothing to do with whether the engine was warm or not, the tractor always started and ran okay for a while, then would lose power and run poorly. Found the foil seal from a jug of dry gas (I suppose) floating around in the gas tank. Every now and then it would obstruct the outlet from the tank! Fished it our with one of those grabbers on a flexible rod and cured that problem.
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WC, CA, D14, WD45
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Osage_Orange
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Joined: 11 Sep 2009
Location: SW MO
Points: 1593
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Posted: 10 Feb 2010 at 8:22am |
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After checking out the fuel system, if the problem persists, install new points and condensor. If that does not solve it, substitute a good coil for the one now on the tractor.
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Why is there never time to do it right the first time, but always time to go back and fix it?
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Onslowe in Mo
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Joined: 09 Jan 2010
Location: Montrose, Mo.
Points: 35
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Posted: 10 Feb 2010 at 8:48am |
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Might be a good idea to check the crankcase breather on the valve cover also. I've heard of a D-17 engine running bad because the breather was plugged. Just a thought...
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Bill Long
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Joined: 12 Sep 2009
Location: Bel Air, MD
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Posted: 10 Feb 2010 at 12:01pm |
Sorry I did not say this first. When the engine slows when heated I have to agree with Osage_Orange - look at the condenser (cheap) then the coil.
Steve at B&B has the right one.
Good Luck!
Bill Long
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Dave(inMA)
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Joined: 12 Sep 2009
Location: Grafton, MA
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Posted: 10 Feb 2010 at 1:47pm |
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Should have remembered the coil - my CA would behave just as you are describing. Changed out the coil and it's run fine ever since.
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WC, CA, D14, WD45
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John In.
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Joined: 20 Sep 2009
Location: New haven In.
Points: 69
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Posted: 14 Feb 2010 at 11:11pm |
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I'd check your fuel bowl first...shut off fuel then remove bowl, turn fuel back on and see if fuel flows good ,( make sure you have a catch can) sometimes crud gets stuck in the section between tank and shut off valve, it's happened to me a few times ,a real head scratcher . compressed air and a ice pick helped take care of that problem. John
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