105 surging/dying with deck engaged
 

I mowed last summer with the 105 after putting on a new carb and belts, and plowed this winter.

After installing the deck, I am having it surging and or dying under load. See video, it cycles just like this:
Click here please
http://img.photobucket.com/albums/v1...ps3pjrgpnt.mp4

I just ordered a tuneup kit, but until that comes, I have done the following:
Set points to.020, they were a little wider. Set high speed screw back to 2 turns out from closed, set idle 1-1/2 from closed. Started, turned up throttle to full, and adjusted per maintenance manual.

I then engaged the deck, and fine tuned. Then I take it out, and it still acts like the video. What would be the symptoms of the valves needing resurfacing?

Governor adjustment?

Thanks, I did see that procedure in the manual, but havent tried it yet. What would cause it to go out of adjustment?

wear and the fact you put a new carb on.

Ok, that make sense. Does that sound like it would cause my issue?

I just saw that i need to time the points http://www.onlycubcadets.net/forum/s...ad.php?t=33461 ,so I may just wait for the tuneup parts and time the points, then set the governor

Governor adjustment takes like 3 min. I wouldn't wait. If it's running ok, points don't wear out all that often. If it needs them, that's fine. I'm not saying don't tune it up, I'm just saying that if it doesn't need them, no reason to replace.

But you should set the timing never the less...

Just the way the link says.

ok, thanks guys. I will adjust the governor. It the wifes birthday today, so I'll look this week.

Is this really all there is to it? You are right 3 minutes
http://img.photobucket.com/albums/v1...psvuk1hrnm.jpg

That's all there is.

Agreed! :beerchug:


Yep. Setting the governor is pretty simple! That's all there is. :beerchug:

Thanks again all

I got the governor set, new points, set timing, new plug and air filter.

It is still surging. Maybe that is not a good description of it. It pulls strong for about 4 seconds, the seems like it is running out of fuel, then recovers, and does it again.

I am thinking the carb would be the next thing to check. Maybe some dirt in it.

Yup! Try richen up the fuel/air mixture a little bit and see what happens.....though I'd still pull and clean the carb.

Thanks Billy. I adjusted it almost 5 turn out from the original 2. It helped a bit, but not nearly enough. I think next Sat I'll be taking it apart, and blowing everything out.

This is one of those $30 ebay carbs, so hopefully the quality is not an issue. I still have the walbro that came on the 105 when I got it, but not sure if rebuilding that would be a better option or not.

Sounds like the main jet is plugged, or the orifice isn't large enough. 5 turns out, you just as well remove the screw. It goes max fuel at around 3/3.5.

Thanks, I noticed that there was really no improvement when I got it out that far.

On a good note, it is all tuned up. I had been meaning to do that since I got it

Since attacking the engine has not seemed to help . . .

Have you checked the deck? I had a similar problem and it turned out to be a binding bearing in the deck putting a heavy load on the system.

Just a thought.

Good luck & let us know what it was when you get it sorted out.

Likewise, check the tension on your mule drive belt, as well.

Cub Cadet 123

I just put a newer spindle on the center of the deck before putting on for the season. The others seemed to move ok, but I will recheck. I did grease them all as well

On the mule drive, can the tension be set too tight?

Yes it can. There is a guide on the front of the mule drive part of the undercarriage that shows you how to set the tension spring on the pulley.

Cub Cadet 123

Thanks , I'll track down a copy of the guide

There is supposed to be a sticker on the mule, but it's also in the owners manual. There is a copy in the tech section with the rest of the manuals.

Ok, good deal thanks

I rebuilt the carb, it starts and runs like a champ! Thanks for the assist guys.

Also adjusted mule drive