Toro tc3100 Pro

[Back]

First I want to say hi and I am glad I found you all. I was really shocked when I found that the old site was gone. Some of you have helped me a lot in the past and again I have a problem with something I have no clue about.

OK so here goes. This weekend I was given a Toro tc 3100 Pro. To my eye it had never been used. The head had no scratches on it ect. My brother got it from his wifes grandfather and he said he never used it.

I put gas in it and it started up and ran good no problem other than a little hesitation at the top end. I used it for about 1 hr. The performance started going down hill. I put it up for the day. Next day All it would do is run and die if you tried to give it gas.

I took the carb apart and it looked new. no varnesh,dirt or sign of wear. I sprayed carb cleaner in all the ports that I could see and checked to see if the metering needle was stuck. It is not. I put it back together and it will not prime. I acts like there is a blockage in the carb. Primer /fuel dilvery system seems to work fine. I can easly push the primer bulb with the gas line disconnected from the carb and get gas movement with no problem.

I have looked and found no kind of ball check valves. So any ideas of what to look for before I spend any money on it?

cant buy a new carb they dont make them. From the little I found it was only made from 88 to 92 and only for this weed wacker. It is a nikki 6050 style.


If any of you can help I thank you in advanced.

Bless
Back

[KE4AVB]

Try pulling the muffler and see it runs. Also while the muffler is off check the cylinder and piston condition.

If it runs with muffler off then it probably a clogged spark arrestor. Don't know if the muffler has or not. I haven't work on any Toros here.

[motorhead64]

Sounds like a fuel starve problem. Change out the in-tank fuel filter for starters. If you don't see improvement, pull the carb and take the side covers off. Check the diaphragm element for stiffness. If it ever had gas in it and it has sat that long, it's probably no longer pliable enough to pump effectively. You should be able to get a carb kit on the Bay. MH

[KE4AVB]

MH, If your talking about the large diaphragm that operates the metering lever it is not a pumping diaphragm. It is pull in by the vacuum through the main metering nozzle and only controls the fuel flow. This why the setting of the metering height is so important. It is the pump diaphragm that does the pumping. Although the pump diaphragm looks different than the normal cube carburetor version it probably still have those check valves(flaps) that can curl up and quit working. The gasket top right in the picture below is the fuel pump diaphragm along with it gasket lower right.

Stens 615-120 Gasket and Diaphragm is the aftermarket carb kit.

[motorhead64]

Yeah, both sides get stiff with bogus gas, and both sides will affect proper fuel delivery. MH

[Back]

Hi All
It is alive

It did take a while to figure out. A very good learning experiance for me. To make it simple the diaphrams were bad as I thought. My thought of how the metering valve was wrong I got stuck wondering why I could not get fuel. I figgured out on this carb if the needle is all the way down it shuts off the fuel. After I pushed up on it I got gas. That is when I realized that the diaphram was to stretched to much to make it work.

A 90$ kit arived yesterday and I installed it this morning. Some fine tuning and it runs awsome.

To keep it alive as long as possiable I have questions about gas and fine tuning. First gas and oil. This trimmer is suppose to run on a 32 to 1 mix. I have read that if you use synthetic you can go 50 to 1. Is that correct? If so I think I will use some caned gas like trufuel because it is a 80 mile trip to get gas that has no ethonal in it. If not and I need to use a 32 to 1 ratio at 90 $ a pop when these diaphrams are shot I will not replace them if they dont last more than a season.

Fine tuning. Idle is good and after I found the highest rev I backed it off some. any thing else I need to do ?

Thanks in advance.
Bless
Back

[KE4AVB]

I am almost afraid to ask where you are country wise. Here it only cost about 18 usd including shipping for an after market gasket and diaphragm kit.

Here I use and sell a good multi-mix oil with ethanol treatment that works in all trimmers and chainsaws that run on 16/1 to 50/1. One gallon mix bottle to a gallon of fuel and I don't have a mess cans with different mixes sitting around going bad.

[Back]

KE
Thanks for the reply.
I live in Indiana US. If you could find an after market kit for this carb I would owe you big time.

Nikki
8-11
802y0
6050

I could only find parts under the Toro tc3100 Pro. These parts are around 90$ at partstree.

Getting this to run incourages me to dig out my 15 year old craftsman weed wacker and see if i can get it running again. I have a brush blade for it and sure could use it.

I think I will use the trufuel. I use less than 2 gal a year and if it gets me a couple of years on the diaphrams it will be worth it. I am currently using Echo oil.

Bless
Back

[bgsengine]

I could only find parts under the Toro tc3100 Pro. These parts are around 90$ at partstree.

Famously over-priced on "legacy" Toro (Toro quit producing the product, jacks up prices so high it's virtually not worth fixing)

However, if you can get us a part number that was on the package, I bet someone can cross reference it.

[Back]

Hi bsengine

However, if you can get us a part number that was on the package, I bet someone can cross reference it

That would be to cool I used this weed wacker for about an hour and 1/2 today. I had to make some adjustments but it kicked my but and I got a lot done.

Here are the #'s

Main diaphram 54-5090

Pump diphram 54-5020

carb gasket 60-7940

diaphram gasket 54-5000

pump cover gasket 54-5010

Total cost was 90.20 $ I hope that you guys can find something cheep or when it dies again it is junked.

Bless
Back