422 Robin eng...problems AGAIN.

[ldabe]

Idabe I hope I'm way off but this sounds quite a bit like my gas in my crankcase issue. I got quite a bit of whitish smoke and she died. Have you checked your oil level? See http://www.tractorbynet.com/forums/power-trac/149992-2-part-gas-1-part.html. You might take a sniff of the towell you clean the dipstick on too just to be on the safe side.

Yes, I do think there is gas in the oil. The oil level is good, but I do smell gas by smelling the dip stick.

Seeing that my Robin has ALWAYS run rich (even after new carb was installed) shouldn't there be away to "adjust" the fuel into the carb?

Today I installed two NEW plugs.
Installed all NEW fuel hose.
Installed a NEW fuel hose line filter.
Cleaned the outside of "fuel pump" and blew out the inside lightly.
Cleaned the "air cleaner base", (removed it to get underneath).
Cleande all around the carb (didn't take apart).

And I installed a "fuel shut off" valve under the gas tank, the first few months I had it when I first bought it used (after reading about elevated tank on Robin site...Hey! PT, don't you guys converse with your venders...or at least READ!?).

So, SUGGESTIONS?

I guess I will change the oil AGAIN. But to me the problem seems to be way to rich carb.

Btw, I have not tried to start it, and don't think I will try (first change the oil) until I can see if I can contact someone for some "enlightenment" from the Robin dealership. (Hey Jack! Are you still peaking in on this forum?)

No sense in fouling up two NEW plugs. Or diluting NEW oil.

 

[woodlandfarms]

Does this sort of an article help you guys with Robins out? It s a very solid but generic explanation of how to rebuild and tune a carb....

SER FAQ: LMFAQ: Cleaning Craftsman (Tecumseh) carburetors

 

[cqaigy2]

No, there is no fuel shutoff on my tractor which is a 2001 PT425 with the Kohler engine.

No fuel shut off either. Robin engine

 

[Gravy]

(Hey Jack! Are you still peaking in on this forum?)

I believe JackRobin moved to a different position a while back and the new guy hasn't been active here.

 

[ldabe]

Thanks for the update Gravy.

 

[J_J]

Well, I guess the fuel in the crankcase thingy, should be an incentive for all to get, and use the fuel shutoff valve, be it manual or electric.

 

[ldabe]

JJ, I have used one (shut off valve/manual) almost from the time I bought the machine, and definitely since the new carb was installed. Have always used it.

I spoke with a man who works on small engines in another state, and he told me that Robin and Honda engines with the "pulse fuel pump" are known to have issues with pin holes in the diaphrams. He said he has changed 3 pumps in the last two weeks. Also said that B&S makes the same pump for about half the price.

So, I am hoping that changing that pump next, will do the cure.

 

[ldabe]

Woodlandfarms,
Thanks for the article.
Read most of it, but I really don't want to get into rebuilding carbs. I don't mind "cleaning" maybe once every five years or so (and to me it should not have to be done more than that or it is just a poor design) but that is about all I want to mess with.

 

[ldabe]

First let me vent- I WILL NEVER NEVER NEVER HAVE ANOTHER ROBIN'S ENGINE!

Ok, glad I got that out of the way.

Alright, I have put in new plugs/fuel hoses/oil/oil filter/and a new pulse fuel pump.

Throttle on 3/4, Choke on full, turn key to crank engine for about 5-8 seconds, and wallah! NOTHING!

Try again, for about 5 seconds, same as first! Try again with Choke off, for about 6-8 more seconds, and viola! NOTHING!

Nothing that is but a carb full of FUEL!!!

I am looking down into the carb (already see gas all over the base, where the air filter sits) and I bump up against the tire to shake the tractor a bit, and can see fuel puddle in the carb!

Now what...besides a match! No really. I am ready to torch this thing (as my wife cheers me on in the background to JUST DO IT!).

Any other suggestions guys, before "the wife thou hast given me" moves me to do something I would probably regret later on ;~)

 

[J_J]

ldabe,

Do you know for sure that you have spark? Did you try starter fluid?