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Question posted by support25416 on April 3rd, 2024

Ms 251c Oiler Adjustment Screw Location?

Where is the chain bar oiler adjustment on the ms 251C? A supporting image may be helpful...

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Answer #1: Posted by hzplj9 on April 3rd, 2024 12:44 PM

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hzplj9

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The chain oiler is normally preset which runs from the motor. If you have a problem with the oiler it means that you need to clean the pipework the feeds the oil. Remove the chain and start the saw. With a full tank of oil you should see a trickle of oil coming out at the exit of the chain route. Usually poking a stick or wire into the hole will loosen any debris and allow oil to flow. Once it comes out then you can refit your chain and work normally. If that is not successful you will need to access the internal pipework from the tank to the outlet. This is also often clogged with debris.

Hope that helps.

Related Stihl MS 251 Manual Pages

Instruction Manual - Page 3

...Inlet Needle 90 12.6.3 Pump Diaphragm 91 12.6.4 Lever on Throttle Shaft 92 12.6.5 Adjusting Screws 93 12.7 Adjusting the Carburetor 95 12.7.1 Basic Setting 95 12.7.2 Standard setting 96 12.8 Carburetor ....2 Fuel Hose 101 12.11.3 Fuel Hoses - Servicing Aids 112 2 MS 231, MS 231 C, MS 251, MS 251 C Special Servicing Tools 110 14. Manual Fuel Pump 105 12.11.4 Manual Fuel Pump...

Instruction Manual - Page 4

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Instruction Manual - Page 8

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Instruction Manual - Page 16

... Seal connections or install new fuel hose Engine loses power during acceleration Sealing ring or spring in accelerator Install new carburetor pump worn or damaged MS 231, MS 231 C, MS 251, MS 251 C 15 3.6 Carburetor Condition Carburetor floods; engine stalls Cause Remedy Inlet needle not sealing -

Instruction Manual - Page 18

..., MS 231 C, MS 251, MS 251 C 17 key in carburetor, replace if necessary Leak on fuel hose from tank to carburetor Seal connections or install new fuel hose Setting of high speed screw H too Check basic carburetor setting, rich correct if necessary Main jet bores or ports blocked Clean the carburetor Pump diaphragm damaged or fatigued...

Instruction Manual - Page 27

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Instruction Manual - Page 28

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Instruction Manual - Page 29

... is next to the recess (arrow) and then remove it from the retainer (4). : Fit the adjusting screw (1) and wind it home until the gap between the screw's hexagon and the retainer is next to the right of the recess (arrow). 2310RA061 TG Installing 2...through the bore (arrow) in the engine housing. 1 2 : Push the insert (1) with the housing ribs. 28 MS 231, MS 231 C, MS 251, MS 251 C

Instruction Manual - Page 30

..., b 5.4.1 2310RA060 TG 2710RA079 TG 5.5 Chain Tensioner 2310RA066 TG : Attach the brake cable (1) to the bore (arrow) in the brake lever (2). 2 1 : Slide the brake cable retainer with lug (1) through the opening and press it in the reverse sequence. - Lift the tank housing and secure it into the adjusting screw (2) - if this is not the...

Instruction Manual - Page 31

... part of the recess (arrows). : Insert and tighten down until it snaps into position. 1 2 1 The chain catcher (arrow) is installed in the reverse sequence. - Check the wing nut (1) and replace if necessary 30 MS 231, MS 231 C, MS 251, MS 251 C Lubricate thread and gears with the contour of the sprocket cover (1). - Reassemble in the reverse sequence...

Instruction Manual - Page 34

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Instruction Manual - Page 46

... TG 2 2 1 The electronic (breakerless) ignition system basically consists of adjustment during repair work on the coil body: 1. High voltage output with washers. : Remove the ground wire (4). - Troubleshooting on the ignition system should always begin at the spark plug, b 3.5 - MS 231, MS 231 C, MS 251, MS 251 C 45 The ignition module accommodates all the components required to...

Instruction Manual - Page 50

...TG 2310RA129 TG : Make sure the leg spring (arrow) locates properly inside the spark plug boot. - Replace flywheel if... tapered seat. Reassemble all other parts in the crankshaft. - MS 231, MS 231 C, MS 251, MS 251 C 49 Set the air gap between the ignition module and ...- Use locking strip to block the piston, b 4.2 : Screw the puller (1) 5910 893 0801 onto the crankshaft as far ...

Instruction Manual - Page 53

...circuit wire (2) - Fit the contact spring, b 7.7.4 - Check the air gap between the ignition module and flywheel and adjust if necessary, b 7.3 : Fit the screw (4) with washer and tighten it down firmly. : Press the ground wire (5) fully into the guide (arrow). 3 Check ... (arrow) as far as stop (3). - Install the filter base, b 12.3 2310RA147 TG 52 MS 231, MS 231 C, MS 251, MS 251 C

Instruction Manual - Page 67

... spring (2) as far as stop. : Screw the AV spring (2) with bearing plug (2). 66 MS 231, MS 231 C, MS 251, MS 251 C Servicing the AV System Vibration-damping springs, annular buffers and stop . 1 - 9. Reassemble all other parts in the area of the machine. - Installing 2 9.2 AV Spring on Oil Tank The antivibration elements are located in the reverse sequence. 2310RA233...

Instruction Manual - Page 94

.... Reassemble all other parts in line with the high speed screw H. Installing 3 1 12.6.5 Adjusting Screws 1 4 - Screw down the low speed screw (L) as far as stop. - MS 231, MS 231 C, MS 251, MS 251 C 93 Low speed screw 1 1 : Rotate the limiter cap until the lug (1) is in the reverse sequence. 1 2 3 There are three adjusting screws on the end of the shaft. : Fit the retaining ring...

Instruction Manual - Page 96

... clarity the adjusting screws are installed, the adjusting screws fitted and the new limiter cap preinstalled. - Adjust engine speed with H = 1 1/2 turns open it 1 full turn counterclockwise - Use the low speed screw (L) to set the engine's maximum speed to 13,000 rpm. This speed cannot be replaced or after removing the limiter cap. Check chain tension and adjust if...

Instruction Manual - Page 97

... screw (H) clockwise (leaner) - Adjusting engine idle speed - Warm up the engine. - Check chain tension and adjust if necessary. - Turn the idle speed screw (LA) counterclockwise until the chain...MS 231, MS 231 C, MS 251, MS 251 C Turn the adjusting screws only very slightly. Check the air filter and clean or replace if necessary, b 12.1 Standard setting - Turn the idle speed screw...

Instruction Manual - Page 103

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Instruction Manual - Page 106

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