I have a mcCulloch ms1436nav will go dead when giving the fuel
I have a mcCulloch ms1436nav Been running great, but today after cutting for couple of hours, it would start right up but when giving fuel it would die. I checked and cleaned the carburetor twice with no change. It seems like it is not getting fuel..
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Thats is definately a lean condition. Can be caused by one or more of the following problems: clogged fuel filter, rotten fuel lines, stiff diaghrams, and clogged carb screen. Todays fuel is a large cause of the problem so I advise that you go ahead and service the entire fuel system... replace the fuel lines and filter and rebuild the carb. Also if the primer bulb is discolored ( brown, they are clear when new) it should be replaced too. This is not a difficult task as long as you are patient and take your time. Carb kits run from 7-12 bucks, a filter is about 3 bucks and fuel line is about 2 bucks a foot and a primer buld is just a few bucks. I reccomend getting extra fuel line. It needs to be very snug in the tank to prevent leaking so cut an angle on the end of the fuel line to get it started then reach in and grab it with hemostats and pull it though the fill opening; then cut it off even and insert the fuel filter; then pull the line back into the tank to desired position making sure that filter lays loosely on the bottom of the tank, then cut to length to attatch to carb
All the lubrication for the engine comes from the oil mixed with the fuel, so it is VERY important that you use good quaility two stroke oil designed to be used in a chainsaw, and mixed as per the manufacturers recommendations, if you are not too sure then run a 25.1 fuel oil mix, if the egine lacks lubrication the piston will start to scuff around the exhaust port ( the hottest part of the engine ) lose compression and become difficult or impossible to start. A quick check is to remove the muffler and take a look at the piston skirt through the open exhaust port.
Does the chain turn freely by hand? Is it being oiled properly? Check the fuel filter, air cleaner, and muffler for plugging. Does 'feathering' the choke make any difference? If it helps, try turning the H jet needle CCW about 1/4 turn which should make it run more rich and 4-stroke until you are cutting which should immediately cause the engine to 2-stroke. Hope some of this helps!
The chain must be properly sharpened to cut efficiently and the oil pump must be feeding oil to the chain/bar. Check the oiling by running the saw with the bar tip near some cardboard for a few moments--it should throw off a thin line of oil on to the cardboard. If not, remove the bar and chain and run the motor for a few moments--it should ooze oil out of a side port that exits near the drive end of the bar. If still nothing, check the oil tank filter for plugging, then the oil pump itself--it may have a plastic gear that has stripped it's teeth. Once you get oil from the side port, clean the oil passages in the drive end of the bar, and reinstall the bar and chain. Hope this helps!
If is seems very hot STOP. It is probably running lean and continuing will destroy it (what fuel/oil ratio are you using? 32:1 probably safe). When it starts to sputter if necessary roll it to the side and loosen the fuel cap. Did it smooth out (plugged fuel vent)? Please give me the model and serial numbers (small tag usually on underside) and I can probably find an IPL (exploded parts list) to help us both. Lou
Afternoon Jaches; Mac Operators Manuals are hard. Please try here if enough of us try maybe it will be fixed. McCulloch Manuals Operators Manuals: are much more difficult. I have dialed this number many times (Contact Us - All McCulloch Products 1 (800) 521-8559) and have yet to get a satisfactory response. Please try this! If enough of us try they will fix it! If unsuccessful with McCulloch try here: Beg for manuals thread (ArboristSite - free to join). Please use the search function first, it has probably been asked and answered. http://www.arboristsite.com/showthread.php?t=72322 HTH Lou I searched for 1436, Mac 1436, McCulloch 1436, & MS1436NAV without a hit. Post your need someone may answer. This is where I got my Mac 110 and Power Mac 320 (through a contact made on FY) operators manuals. Good Luck
the l is for idle and the h is for top end but thats not ur problem it sounds like ur carb is clogged there is a screen inside of the carb the fuel gets crystalized and blocks off some and sometimes all of the fuel ill bet thats the problembut u can try the adjustments first give the unit full throttle and turn the h adjustment screw in and or out till it sounds great and at full power if that dont work then do the screen in the carb