Talon Petrol Line Trimmer tuning help please

**viewer** · 24-02-09, 03:44 PM

Hi,

I hope this is the right forum, as there doesn't seem to be another sub forum about mowers etc.

I have model number AT331525 25cc petrol trimmer.

It starts first time every time, but...

Lately it has no power at all, on full throttle.

I have always ensured I have used the applicable 25/1 fuel mix ratio.

I threw out the old mix in the tank in case it was that, I cleaned the filter, I cleaned the plug.

It STILL starts first pull, but again has no "guts"

I cannot locate any tuning screws, and all the manual says is that if there are problems, it is factory set, and take it to your nearest dealership for tuning.

Can anyone give me a clue where to look to tune this thing? There is nothing obvious externally, or even inside where the air filter is, which contains the foam filters and a screen filter.

All help appreciated!

**Godzilla** · 24-02-09, 04:03 PM

Carb has a H and L marking.

L for idle (low speed), H for high speed.

Note the position of the H jet and tweak it 1/4 of a turn either way and test.

Dont turn too far and dont forget your original position, if you run too lean its by by engine.

Sometimes the mixture screws are under a cover to stop people playing with then.

My Talon chainsaw had them under a red plastic oval cover that i had to pry off.

Before you do anything make sure your air cleaner is clean.

**Godzilla** · 24-02-09, 04:30 PM

One other thing i just remembered, make sure you dont have anything caught inside you line holder, sometimes things can get wraped around the spool and make it difficult to turn.

Funny thing my Talon chain saw lost power about a month ago when cutting, idle and start were good, it was the high speed idle mixture in the end, just needed a little tweeking.

**viewer** · 24-02-09, 05:44 PM

Thanks Godzilla...
If I could find something to turn, I'd be laughing. I have cleaned in and around the exterior of the thing, but cannot find nothing. Do I have to take the whole yellow shroud off that covers the string pull, on/off and throttle housing first...that would seem a little like overkill, and plenty of things to fall out when they shouldn't

I did check the line etc, and all is perfectly clear.

Thanks mate

**Ramjet** · 24-02-09, 05:48 PM

A quick nice easy check...take the exhaust pipe off and check to see if there is any carbon/gunk build up within the pipe and especially around the exhaust port where the piston goes up and down.

Your oil mix ratio is a bit rich too – take it out to 40:1 if your using a good oil. If your not using a good oil…suggestion – go out and buy a good oil…

If you have been running this ratio with a crap oil for a while, I’d say that’s your problem…did I mention? Go out and buy a good oil…Echo’s brand is good, as is Stihl.

**viewer** · 24-02-09, 06:17 PM

Hi,

The mix is what is stated in the user manual, and I have been using Penzzoil to mix from.

**Ramjet** · 24-02-09, 06:28 PM

Your exhaust pipe/port will tell you the story. I run all my saws, whipper snipper, etc on 40~50:1, never had an issue. Used to run my two stroke bikes even leaner…its all in the oil.

**viewer** · 24-02-09, 06:34 PM

Ramjet gets the gold mechanic's star of the day!!

Went straight out and slowly inserted a small screwdriver inside the tailpipe.

Gunk as Ramjet said.

Went and poked a few earbuds up there and went yuk!

Pulled the starter, and it whammed into normal full throttle.

Thanks Ramjet, naturally I will clean it better, and will also take your tip re the mixture.

Godzilla...thanks as well for your assistance too...you get the silver star!

Now things like this is why I keep coming back here.

THANKYOU

**Ramjet** · 24-02-09, 06:55 PM

**Dishtrackted** · 13-05-10, 12:18 AM

Just googled and found this
I have the same machine same problem
Will check exhaust tomorrow

Mine will run well,for 5 minutes then heats up and looses power, seems to flood and stall.

I had to replace the hoses as they cracked so ended up taking the carby off and was wondering if I have done something.
But for 5 minutes its excellent.

**dogsbreath** · 13-05-10, 02:54 AM

Another one to look out for is wasp nests in the exhaust if you haven't used them for awhile.

**admin** · 13-05-10, 09:42 AM

Dont forget to click on the thanks button of any posts that help viewer.

**Fernbay** · 13-05-10, 10:19 AM

And here is me thinking those talon wippersnippers were disposable. Good for 10 hours running... Then chuck them out & buy a new one.

You learn something every day

**CONAXLE** · 13-05-10, 11:14 AM

After a few returns to Bunnings to replace or repair my Talon Whipper Snipper., They finally replace it with a more reliable brand. Mc Cullough. havent had trouble since then.The drive shaft keeps coming loose from the motor..

**Ramjet** · 13-05-10, 11:41 AM

Originally Posted by Dishtrackted

Mine will run well,for 5 minutes then heats up and looses power, seems to flood and stall.

I had to replace the hoses as they cracked so ended up taking the carby off and was wondering if I have done something.
But for 5 minutes its excellent.

This doesn't sound like a clogged exhaust problem. it would run crap as soon as you fire it up. It sounds a bit more like a fuel tank or ignition problem. Have you played around with the fuel cap? Maybe it has lost the fuel tank breather and as the engine uses fuel a negative pressure builds up in the tank and starves the engine. Try running it with the fuel cap off or loose so air can get in there.

If this makes no difference, check the spark at the plug when cold and then run it until it dies, pull the plug out and see if spark is still there. That would prove if its an ignition problem.

My guess is its fuel because it worked OK before you worked on the fuel lines. Have a really good look at the old lines and make sure there are no little one-way valves in the lines or anything like that that you have missed.

This was a common problem on some Stihls, people would work on them and put them back together and kink the tank breather or fuel lines and create nearly the same symptoms...make sure you haven't kinked any of the lines.

**Godzilla** · 13-05-10, 12:46 PM

Ill take a wild guess and agree with Ramjets ideas but i have a feeling its running too rich.

Rich engines work well when cold but lose power and die when hot. Its like driving with a manual choke turned on a car.

Sounds like the carb to me too.

I wonder if some of your cracked fuel line has has got into your carb and jammed the fuel needle open?

Just suggestions.

**WhiteOx** · 13-05-10, 01:23 PM

Originally Posted by Godzilla

I wonder if some of your cracked fuel line has has got into your carb and jammed the fuel needle open?

The carb has a diaphram mate.

**Dishtrackted** · 14-05-10, 12:48 PM

Exhaust looked clean
I had a little look yesterday,it seems to be flooding petrol dripping from the carb.

I don't think it had a valve in the old line (I replaced them all)

Is there any way of getting a diagram of the motor to see if I have all the pipes in the right order?
One goes to top of carby has a filter on the end in the tank the others go to tank and bottom off carby via rubber pump primer.
I changed the pump primers over its seems to allow it to pump better.

All the pipes where brittle and broken so there was a fair bit of guess work, but it has worked before this time so something has changed in the last few times.

**admin** · 14-05-10, 12:53 PM

Originally Posted by Fernbay

And here is me thinking those talon wippersnippers were disposable. Good for 10 hours running... Then chuck them out & buy a new one.

You learn something every day

I've got one in the garage somewhere, it hasnt been started for about 2 years.It usually took at least 30 minutes to fire up, by that time you were too buggered to use it. The vibrations from it were enough to nearly hospitalise me, it is the worse balanced thing I have ever used.

**Ramjet** · 14-05-10, 03:34 PM

Originally Posted by Sanity

.It usually took at least 30 minutes to fire up, by that time you were too buggered to use it.

A little tip to get your whippy, chain saw, mower or any other small engine started easily...grab a container of fresh fuel (mixed or otherwise) take the lid off and have a sniff (no racial jokes please

), just a small one so you know how it should smell. Then take the cap off your fuel tank on your engine and have a whiff - if they don't smell exacly the same, the fuel is off and you need to dump it and put in fresh stuff. Most people can tell off fuel straight away anyway, but if you get into the habit of checking the fuel before you try and start it you will have heaps less starting issues. Small engines with clear tanks seem to make the fuel go off quicker - not sure why...

I'm not sure dishtrackted how you will go getting a manual/diagram for that snipper. Maybe someone here could take a snap of their unit for you. The cheap stuff is horrible for getting service info for.