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COMPONENT: SPECIFICATION: 

ENGINE 

T3410                                                     

Displacement  

 34cc/ 2.1 cu. in. 

Bore/stroke  

38 mm X 30 mm 

Horsepower 1.4 

HP 

RPM @ maximum HP 

8000 HP 

Maximum no-load RPM 

10,500 RPM 

Weight (less accessories)  

12.9 lb. / 5.8 kg 

Specific output (cc per hp) 

24.3 cc per HP 

Idle RPM 

3,000 RPM ( +300) 

Clutch engagement RPM 

4,500 RPM (+250) 

Valve actuation 

Cam gear/follower/pushrod/rocker arm 

Cam gear material 

HLP nylon 

Rocker arm 

Forged, adjustable 

Rocker adjustment 

Intake: .

003"/.08 mm  •  Exhaust: .004"/ .11 mm

 

Crankshaft 3-piece 

Crankshaft bearings 

Ball bearings 

Conrod Forged, 

1-piece 

Conrod bearings: large & small 

Caged needle bearing 

Conrod thrust control 

Small end of conrod 

Piston Aluminum/silicon 

alloy 

Rings 2 

Cylinder 

Chrome plated, etched 

FUEL SYSTEM 

  

Carburetor Walbro 

Model WYL 

208B 

Jet size 

#41 

Primer/air purge 

Yes 

Adjustment: H 

n/a 

Adjustment: L 

n/a 

Mounting method 

Captive-nut insulator block 

Filtration Felt 

Fuel tank location  

Under engine 

Tank mounting system 

Cushion 

Number of elements 

Tank capacity  

20.3 fl. oz. / 600 cc 

Fuel Vent 

Duckbill 

Vent location 

Remote 

Recommended fuel 

Unleaded regular 

Fuel/oil ratio 

50 to 1 

CLUTCH 

  

Material  

Bonded 

Number of shoes 

Number of springs 

19 

Section

 

9  T3410 General Specifications

 

Edition 2 •  09/2007

Summary of Contents for T2510

Page 1: ...SHINDAIWA SERVICE MANUAL 7 50 SERVICE MANUAL T2500 T2510 T3410 Trimmer Brushcutter with C 4 Technology Four Stroke Engine Edition 2 September 2007...

Page 2: ...tment 8 5 Pushrods Followers Cam 11 6 Reed Valve Inspect Replace 13 7 Crankcase Intake Sealing 14 8 Inspecting Impulse Passage 16 9 General Specifications 17 10 Tolerances Wear Limits 21 11 Torque Val...

Page 3: ...high exhaust emissions occur due to exhaust scavenging unburned fuel not the fuel oil mix Unlike conventional four strokes the C4 engine can run in any position all day long No dipsticks oil filling b...

Page 4: ...o incorporating the upper crankcase half the cylinder also has compartments for cam gear assembly and overhead valve components rocker arms valves and valve springs Differences 2510 3410 The 3410 engi...

Page 5: ...not a problem because four stroke cylinder does not have port openings D Cam Gear Valve Train Four stroke intake and exhaust functions are controlled by a single lobe nylon cam gear Cam lobe activates...

Page 6: ...ls are identified by name and part number in the step by step explanations A complete listing of all the special tools required for this product can be found in the Special Tools IPL P N 80390 E Exclu...

Page 7: ...35 mm clearance D Before Proceeding Make sure engine is cold Reassemble engine except valve cover before loosening adjusting hardware Loosen rocker arm adjusting nut just prior to performing adjustme...

Page 8: ...aligns with left inside edge of clutch drum housing If housing has been removed align adjacent flywheel fin with edge of cylinder casting STEP 3 Rotate flywheel back and forth while observing rocker...

Page 9: ...urn engine over several times and return to TDC compression Recheck with proper feeler gauge to make sure clearance adjustment did not change as a result of tightening locknut Readjust as necessary ST...

Page 10: ...r hemostat to move upper end of pushrod into position When installing pushrods verify that they are properly seated in cupped receivers in follower and rocker arm adjustment screw C Remove Rocker Arms...

Page 11: ...nment and reinstall screw Tip of screw should mesh with marked notch on cam gear 4 Complete engine assembly 5 Remove timing screw install original washer and reinstall with thread locking compound Alw...

Page 12: ...mm Cracking or warping Discoloration or corrosion Debris accumulation Replace reed valves that exceed gap specification or those with indications of warping discoloration corrosion or debris build up...

Page 13: ...uence is similar to two stroke pressure test Requires crankcase pressure testing kit P N 72174 99200 STEP 1 Remove carburetor but leave insulator block reed valve in position STEP 2 Remove muffler STE...

Page 14: ...o cracking no rough sealing surfaces no pulled inserts cast in nuts Always remove insulator block reed valve and inspect venturi impulse side for cracking Cracks in this area are rare but do occur Che...

Page 15: ...engine over slowly and watch impulse passage Remove spark plug if easier cranking desired If impulse passage is working properly the drop of oil should suck in and blow out as the engine revolves STEP...

Page 16: ...ings Ball bearings Conrod Forged 1 piece Conrod bearings large small Caged needle bearing Conrod thrust control Small end of conrod Piston Aluminum silicon alloy Rings 2 Cylinder Chrome plated etched...

Page 17: ...n ANTI VIBRATION Full A V system Engine lower unit Rubber cushion Front handle Soft grip Rear handgrip Soft grip Spring rubber on harness n a LOWER UNIT Drive type Gearcase with 4 bearings spiral beve...

Page 18: ...gs Ball bearings Conrod Forged 1 piece Conrod bearings large small Caged needle bearing Conrod thrust control Small end of conrod Piston Aluminum silicon alloy Rings 2 Cylinder Chrome plated etched FU...

Page 19: ...n ANTI VIBRATION Full A V system Engine lower unit Rubber cushion Front handle Soft grip Rear handgrip Soft grip Spring rubber on harness n a LOWER UNIT Drive type Gearcase with 4 bearings spiral beve...

Page 20: ...08 0 2 Cylinder inside bore diameter 1 338 34 0 1 339 34 02 Cylinder out of round 00039 010 0 0012 03 Cylinder taper 00059 015 0 002 0 05 Piston ring width 059 1 5 057 1 45 Piston ring thickness 059 1...

Page 21: ...iameter 1968 1980 5 005 5 035 0 199 5 06 025 Valve spring free length 692 17 6 0 685 17 0 6 Valve stem OD Intake 1365 1370 3 470 3 485 0 135 3 435 035 Exhaust 1353 1359 3 440 3 455 0 134 3 405 035 Val...

Page 22: ...006 0 15 Cylinder inside bore diameter 1 496 38 0 1 497 38 02 Cylinder out of round 00039 010 0 0012 03 Cylinder taper 00059 015 0 002 0 05 Piston ring width 059 1 5 057 1 45 Piston ring thickness 059...

Page 23: ...eter 1968 1980 5 005 5 035 0 199 5 06 025 Valve spring free length 692 17 6 0 685 17 0 6 Valve stem OD Intake 1365 1370 3 470 3 485 0 135 3 435 035 Exhaust 1353 1359 3 440 3 455 0 134 3 405 035 Valve...

Page 24: ...70 Plate cam gear 01280 04062 Tapping screw M4X6 1 7 10 8 12 Cam gear cover cylinder 11022 04140 Allen screw M4X14 5 20 40 25 45 Timing screw cylinder 62901 43310 Phillips screw M5X7 1 35 45 40 50 Ad...

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