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Husquivarna strimmer engine starts hunting when hot.

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We have a 27hp v twin briggs & strattion which back fires and surges when engine is hot


have you tried checking the lean,rich needle on the carb sounds like it's to lean. good luck

Aug 11, 2014 | Briggs AND Stratton Intek Briggs &...

1 Answer

1993 geo tracker idle up and down


HOT ENGINE? (ill guess hot)
idle surges.(hunts) (very simple reasons or very hard to find.
the car has 2 engines. G16A and G16B
they work totally opposite, (8valve and 16v)
the vin number tells you the engine type ,digit 8 is engine code
6= G16B 16v
U= G16A 8v
i have factory book. its in chapter 0 these facts.
the cause of idle surge and hunt are:
1: ISC failures. the ISC can stick partially open and then hunts.
clean it and test it . see videos of how.
2: engine running so bad the ISC can nOT regulate idle speeds.

#2 is caused by up to 50 reasons.
8v , air leaks, cause racing idle and iSC goes nuts.
16v , all air leaks cause lean and if too lean the ISC goes nuts.

by nuts , i mean it hunts or gives up.

the list is endless, but the tests are basic,
i cant help you because no engine stated.

http://www.fixkick.com/IDLE-AIR/idle-index-home.html


ISC = IDLES SPEED CONTROLER (a system not just a PART)

Jul 08, 2014 | 1993 Geo Tracker

1 Answer

1998 suzuki swift idle problems 4 speed 1300cc


no engine type stated, there are 6 engines used.
but bad idle is caused by 2 things.
  • misfire.
  • or lean AFR, lean fuel mix.. causes HUNTING
the ECU can also cause the hunt if it can not hold hot idle to spec.
most cars is 800rpm.

Jun 26, 2014 | Suzuki Swift Cars & Trucks

1 Answer

Idle up down


hunting or surging ilde. name the 2 RPMS, low and high , is it hot or cold engine this issue.? 400rpm or 1000 or 2000 all are diff.causes.
no year, stated. so cant help.
but ill answer in the generic,
1: the ECU (got a carb,? )
the ecu controls idle speed at all times.
if not , there is a problem (you)
A: air leaks in the induction will make motor race at some point the ECU/ISC loses control. and hunts. trying hard to correct it.
b: egr stuck open idle too low, iSC cant correct it,, bad EGR.
c: engine EFI running way too leak starving for fuel so it hunts for 2 reasons < ISC hunting, and lean does that.
lean is gross power loss and opening throttle bogs the engine.
so is double bad. ISC makes it worse,

all this breaks down to 2 reasons.
1: ISC bad. in some way (gummed up. or restricted inside)
2: bad fueling or air leaks. vacuum leaks.

try answers , the hot cold question and the 2 speeds, of the hunt.
lowest rpm and highest of the hunted range of RPM.

Nov 23, 2013 | Honda Civic Cars & Trucks

1 Answer

Sovereign strimmer HS-PT-2538


I had this problem once when machine was hot it was difficult to restart, I've found putting choke on slightly, about a quarter of the way, and not touching the throttle will see it starting, then put choke back off and leave it to idle for 20 - 30 seconds before using. Seems to be a characteristic of this strimmer.

Jun 11, 2013 | Garden

1 Answer

Briggs & stratton - after warm up engine idles rough or hunts -runs fine when cold


make sure the intake is not cracked or leaking spray carb cleaner arround gasket and carb sounds like you have a hot condition vacume leak

Jul 14, 2012 | Garden

1 Answer

Can't start the strimmer. It is a petrol strimmer, Partner Colibri. Is there a technique other than pulling the cord? Does it need more than just petrol? would be pleased if you could help. Regards...


Start procedure, switch the ignition switch on, press the primer bulb as many times as it takes to 3/4 fill the bulb, put the choke to the full position,hold the throttle trigger open, crank the engine until it fires once, move the choke to the centre position, crank the engine until it fires up and runs, once warm move the choke to the open position.

Jun 11, 2011 | Garden

1 Answer

Engine thumbles on start and ruff iddle?


Have your intake gaskets replaced. They are leaking. It Will stop the hunt and surge and it will start and idle good.

Apr 07, 2010 | 2008 Buell XB12XT

1 Answer

I have been given a ryobi 306rt petrol strimmer. It starts and then cuts out, I'm not sure of the exact settings as to how you start it up and keep it runnng. Any help would be apprciated.


To give the inital fuel needle mixture settings i would need to know the type of carb. on the unit ie. zama,walboro ect. it should say on the carb.,it may take a little hunting for. Second check all the fuel lines running from tank to carb. checking for craks or breaks.

Dec 26, 2009 | Ryobi Garden

1 Answer

Poulen mower B&S 4.5hp engine "hunts" up and down


The diaphram between the carb and the fuel tank needs renewing.

Jun 13, 2009 | Poulan "Poulan" Push Mower

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