Question about Husqvarna "Chain Saw - 16" Bar, 3 Hp

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What kind of tool do you use to tighten the High and low speed?

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If the carb screws have a spline rather than a screw driver slot , the special tool is part no 530035560, if the dealers will not sell it to you it is available on the web.

Posted on Feb 12, 2012

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Engine cold. Start engine reading says engine hot ac off. Fans run all time.


Are the fans running on low or high ?
Circuit/System Description
The engine control module (ECM) commands the fans ON in either high speed or low speed, depending on cooling requirements. In low speed, both fans are turned ON at a reduced speed. High speed has both fans turned ON at full speed.
In low speed operation, the ECM applies ground to the coil side of the fan low relay. This energizes the coil and applies voltage directly to the left cooling fan through the switch side of the fan low relay, which is fed by the fan 1 fuse. The right fan is connected in series to the left fan through the de-energized fan control relay so that both operate at low speed.
In high speed operation, the ECM applies a ground to the coil side of the fan low relay, the fan control relay , and the fan high relay. On the fan high relay, the energized coil closes the switch side of the relay and applies voltage directly to the right cooling fan through the switch side of the relay, which is fed by the fan 2 fuse. At the same time, the ECM energizes fan control relay pulling the switch side over, providing a direct path to ground for the left cooling fan, which has voltage applied through the energized fan low relay. In high speed mode, the fans are operated as a parallel circuit with full voltage applied to each.
You should have it hooked up to a scan tool that can read engine sensor data parameters . Check for DTC'S - diagnostic trouble codes etc...
Circuit/System Verification
  1. If DTCs P0480 or P0481 are set, perform those diagnostics first.
  2. Ignition ON, verify with a scan tool that the control module is not commanding fan activation.
  3. Ignition ON, observe that the fans are not activated.
Your best bet is to take it to a ASE certified repair shop !

Jan 10, 2016 | 2009 Chevrolet Silverado 1500

1 Answer

What kind of tool do you use to adjust the carb? where can I buy one?


Hi Mr. Martin:
Not quite sure what kind of adjustments you want to do.
All the chain saws that I've experience with have two slotted screws, one high speed, and one low speed. There may also be an idle stop adjustment screw.
Adjustments typically consist of:
1) with the saw running, adjust the low speed screw so that the engine is running smoothly.
2) with the engine running, increase throttle to maximum rpm and then adjust high speed by leaning (screw in) until maximum rpm starts to drop off, then back out 1/3 turn.
3) let the saw return to idle rpm. should be smooth, and chain not turning. Adjust as necessary.
Tool required is small screw driver. It can help if you put a small piece of plastic hose over the blade so that it will not slip off the head of the screws.
Cheerfuls

Nov 16, 2015 | Garden

1 Answer

Dremel rotary tool variable speed, low speed speeds up after short use. Will brush replacement solve this issue?


How stable is your line voltage? The SCR phase control used for speed control is more sensitive to line voltage changes at low speeds than at high speeds. Brushes should be changed when they are worn down to about 1/2 of their original length. Much more than this and they don't have enough tension to properly contact the commutator ring. Check with power off when the tool is cold and slowly turn the chuck by hand to feel the resistance. Run it a while and let the bearings warm up. Turn off power and turn by hand again. If it feels looser when warm (which would cause it to speed up at slow speeds), the tool might need to be disassembled and bearings oiled. I use Dexron automatic transmission fluid to lube most motors. Wipe down any excess.

Nov 14, 2014 | Dremel Variable - Speed Multipro Rotary...

1 Answer

High speed will not turn off


Program again the timer. Timer disproggramed.
There is a lot of kind of timers.try to tell me what kind of timer you have.see config of the timer.

Aug 31, 2014 | Hayward 2HP Pool Pump Motor A O Smith...

2 Answers

Why my driver fan is working onl Hi level only


I guess you mean inside the cars heater fan the switches contacts went bad if you mean the engine fan I don't know what kind of car this is but there are fans that have a low speed & a high speed and if the relay went for low speed you would only get high speed but because of the high weather temperatures and where you are could be the reason the engine is calling for high speed all the time I'm trying the best I can for the limited information you have given

Aug 27, 2014 | Cars & Trucks

1 Answer

My car runs at low speed but the car still shaking,Maintain on time, has spent three years Toyota corolla,I want to know what the shaking will what are the reasons?


There are two types of car shake
1, stop idling shaking, this situation is generally low or lack of cylinder engine idle speed. Misfiring need to check the spark plug and the high voltage line! In addition, the nozzle and the solar term door dirty is easy to appear this kind of circumstance! Wash!
2, the driving time jitter, the chassis and a relationship! Because the rod or swing arms open, do a four wheel positioning can be solved!
source: obd2 tool car diagnostic tool

Dec 02, 2013 | Cars & Trucks

1 Answer

What is the factory setting for lowand high screws on 25cc craftsman blower


If the two screws are side by side, one is the high speed mixture screw and the other is the low speed mixture screw. To set the high and low adjustment screws, tighten the screws in until they stop, don't force the screw after it stops. Back each screw out 1 1/2 turns. The engine will start and run here if everything else is ok. Fine tune each adjustment screw by closing the screw off (CW) until the engine runs rough. Back the screw out (CCW) until the engine smooths out. Run the engine at full speed and adjust the high screw. Let off the trigger and adjust the low screw. Once the mixture screws are adjusted, you can turn the idle screw to adjust the idle speed. It can take some time getting it all adjusted.

Nov 20, 2013 | Garden

1 Answer

1994 chevy kodiak with Cat 3116. Heater/AC blower shuts down


you should make a diagnostic to know what happened to your car
of course you need an auto diagnostic tool : http://www.chinasnoy.comand you can find all kinds of tools in chinasinoy.com

May 21, 2013 | Cars & Trucks

1 Answer

Stihl saw runs but won't idle.


The paper pumps get stiff and do not pump fuel very well. It's the new Ethanol gas that is the Carb Killers. You need a rebuild kit not just disassemble and clean.
You have IDLE ADJUST Low Speed adjust and High speed adjust. Low and High speed adjust have nothing to do with Idle.

Oct 11, 2012 | Stihl 044 046 Ms440 Chainsaw Muffler

1 Answer

This a/c fan motor goes thump thump in low speed, while high speed seems to work ok. I tightened the fan belt but still the same


Check the bearings. check the belt and if it has any craks on the inside or is missing and pieces it needs to be replaced. But it kind of sounds like a bearing failure to me Soin the motor shaft as well as the fan shaft and see what you get .. Hope this helps Jon

Aug 07, 2011 | Heating & Cooling

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