OPTIONAL ATTACHMENTS & ACCESSORIESAccessories99944100025 Rain Gutter Kit

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RePower Maintenance Kits90107 Tune-Up Kit

PARTS CATALOG

PB-251 Power Blower25.4cc

MODEL:SERIAL NUMBERSPB-251: S/N: 09001001 - 09999999

ECHO, INCORPORATED400 Oakwood Road Lake Zurich, Illinois 60047 USA

WWW.ECHO-USA.COM

99922203923©2010 ECHO Incorporated, RePower is Registered Trademark of ECHO Incorporated. All Rights Reserved REVISED 12/29/10

Click Any Diagram Description Below To View That Diagram.

PB-251 S/N: 09001001 - 09999999Fuel System.....................................................................................................................................................................4

Starter...............................................................................................................................................................................6

Intake................................................................................................................................................................................8

Carburetor -- RB-K85.....................................................................................................................................................10

Exhaust...........................................................................................................................................................................12

Handle, Switch, Throttle Cable......................................................................................................................................14

Blower Tubes..................................................................................................................................................................16

Fan Housing...................................................................................................................................................................18

Ignition, Cylinder Cover................................................................................................................................................20

Engine, Short Block - SB1092......................................................................................................................................22

Labels.............................................................................................................................................................................24

Gasket Kit -- P021012350..............................................................................................................................................26

Part Number Index.........................................................................................................................................................28Part Description Index..................................................................................................................................................29

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Table of Contents Part Number Index

Table of Contents

- 3 -

This Page Intentionally Left Blank

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Table of Contents Part Number IndexPB-251 Power Blower Fuel System

REMARKSDESCRIPTIONQTYPART NUMBERITEMTANK, FUEL1A3500005101SCREW 5X20 - TAPPING2900253050202WASHER2900603000053CUSHION1V4200014304GROMMET1132115443305

REPOWER BULK OPTION: 90017PIPE, RETURN - 3X6X85mm1132010497306REPOWER BULK OPTION: 90014PIPE, FUEL - 3X5X175mm1V4710018607

CLIP2132013098208FILTER, FUEL1131205073209VENT ASY1A35600003010

REPOWER BULK OPTION: 90014PIPE, VENT - 3X5X50mm1V47100122011GROMMET11321150146112

INCLUDES ITEMS 14-15CAP ASY - ORANGE11310045553013GASKET, CAP11310165583014CONNECTOR, CAP11310515603015

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Table of Contents Part Number IndexPB-251 Power Blower Fuel System

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Table of Contents Part Number IndexPB-251 Power Blower Starter

REMARKSDESCRIPTIONQTYPART NUMBERITEMINCLUDES ITEMS 2-3SPACER ASY1V3760009001

FLANGE NUT 51V2630000702SCREW 4X164900163040163

INCLUDES ITEMS 5-7STARTER PAWL ASY1A0520002004E-RING 42900700000045SPRING, RETURN2177234122206PAWL2P0220068507

INCLUDES ITEMS 9-15STARTER, RECOIL1A0510010608SCREW1177236443309RETAINER11772461112010GRIP, STARTER11772282703011GUIDE, ROPE11772274203012

REPOWER BULK OPTION: 99944440000ROPE, STARTER - 3X700mm1P02200826013PULLEY11772154443014SPRING, REWIND11772204203015CUSHION1V42000144016SCREW 5X1439001060501417

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Table of Contents Part Number IndexPB-251 Power Blower Starter

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Table of Contents Part Number IndexPB-251 Power Blower Intake

REMARKSDESCRIPTIONQTYPART NUMBERITEMTHUMB SCREW1V2990002501WASHER1131911034602LID, AIR CLEANER1A2320003403FILTER, AIR - DOUBLE LAYER11A2260004704

OPTIONALFILTER, AIR - SINGLE LAYER1A2260003505PLATE, PREVENT1A2440000706SCREW 5X602900105050607AIR CLEANER CASE ASY1P0210109808GASKET, INTAKE21130016420319GUIDE, CABLE1C48000007010NUT 61V26400005011GASKET, INTAKE21V10300040012INSULATOR1A20000028013SCREW 5X2529001620502514GASKET, INTAKE21V10300039015

See Carburetor Diagrams For Additional InformationCARBURETOR1------------------16

Footnotes 1: Also Included In REPOWER TUNE-UP2: Also Included In Gasket Kit

99922203923 - 9 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Intake

99922203923 - 10 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Carburetor -- RB-K85

REMARKSDESCRIPTIONQTYPART NUMBERITEMCARBURETOR -- RB-K851A021001350ROTOR COVER ASY1P0050020001SCREW, ROTOR COVER3125344139312SWIVEL1P0050012403E-RING1P0050001904SCREW, THROTTLE ADJUST1P0050001005PLUG1P0050012706O-RING1P0050002807BODY, CARBURETOR11------------------8PLUG1P0050012709NEEDLE - HIGH SPEED1P00500126010PURGE BASE ASY1P00500189011SCREW, PURGE BASE ASY1P00500027012BULB, PURGE11253810866013RETAINER, PURGE BULB1P00500025014SCREW, RETAINER4P00500190015COVER, DIAPHRAGM11253425213016SCREW, DIAPHRAGM COVER21253445213017SCREW, METERING LEVER PIN11253394203018

INCLUDES ITEMS 21-30REPAIR KIT1P00500167019ROLLER, GUIDE1P00500100020PIN, METERING LEVER1------------------21VALVE, INLET NEEDLE1------------------22LEVER, METERING1------------------23SPRING, METERING LEVER1------------------24STRAINER1------------------25DIAPHRAGM, PUMP1------------------26GASKET, PUMP1------------------27GASKET, METERING DIAPHRAGM1------------------28DIAPHRAGM, METERING1------------------29

INCLUDES ITEMS 32-35DIAPRAGM/GASKET KIT1P00500166030DIAPHRAGM, PUMP1------------------31GASKET, PUMP1------------------32GASKET, METERING DIAPHRAGM1------------------33DIAPHRAGM, METERING1------------------34

Footnotes 1: NOT AVAILABLE SEPARATELY

99922203923 - 11 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Carburetor -- RB-K85

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Table of Contents Part Number IndexPB-251 Power Blower Exhaust

REMARKSDESCRIPTIONQTYPART NUMBERITEMSCREW 5X142900106050141COVER, EXHAUST1A3200004102SCREW 4X12591367040123GUIDE, EXHAUST - OUTER1A3130008504GUIDE, EXHAUST - INNER1A3130008405

INCLUDES ITEM 7EXHAUST GUIDE KIT1P0210169306GUIDE, EXHAUST1A3130010707GASKET, EXHAUST11V1040009408SCREEN1A3100000709BOLT 52V20300019010WASHER29006030000511MUFFLER1A30000014112SHIELD, EXHAUST11V10400082013

Footnotes 1: Also Included In Gasket Kit

99922203923 - 13 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Exhaust

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Table of Contents Part Number IndexPB-251 Power Blower Handle, Switch,Throttle Cable

REMARKSDESCRIPTIONQTYPART NUMBERITEMCOVER, HANDLE1C4110000101SCREW 5X20 - TAPPING3900253050202SCREW 5X251900253050253SCREW 5X251900238050254WASHER1900603000055LEVER, THROTTLE1C4530002606WASHER1900603000057FLANGE NUT 51900562500058TRIGGER, THROTTLE1C4500002409ROD, THROTTLE1C45400013010CABLE, THROTTLE1V43100000011

INCLUDES ITEMS 13-14IGNITION SWITCH ASY1A44000077012SCREW 3X101915450301013KNOB1A44400002014TERMINAL, GROUND1V48600007015LEAD, GROUND1V48500083016FLANGE NUT 51V26300007017HANDLE, UPPER1C40000047118COVER, THROTTLE1C45900001019COVER, ENGINE1A16000083020

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Table of Contents Part Number IndexPB-251 Power Blower Handle, Switch,Throttle Cable

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Table of Contents Part Number IndexPB-251 Power Blower Blower Tubes

REMARKSDESCRIPTIONQTYPART NUMBERITEMTUBE, BLOWER - NOZZEL1E1650001701TUBE, BLOWER - STRAIGHT1E1650001802

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Table of Contents Part Number IndexPB-251 Power Blower Blower Tubes

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Table of Contents Part Number IndexPB-251 Power Blower Fan Housing

REMARKSDESCRIPTIONQTYPART NUMBERITEMGUARD, FAN1E1040000801SCREW 5X20 - TAPPING14900253050202CLAMP2E1620000003CASE, FAN1E1030004614BOLT 8X141900100080145WASHER1100143198306FAN1E1000000707CASE, FAN1E1030004518SCREW 4X204900162040209HANDLE, LOWER - INNER1C41000039010HANDLE, LOWER - OUTER1C41000040011

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Table of Contents Part Number IndexPB-251 Power Blower Fan Housing

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Table of Contents Part Number IndexPB-251 Power Blower Ignition, Cylinder Cover

REMARKSDESCRIPTIONQTYPART NUMBERITEMCOIL, IGNITION1A4110002901BOLT291113040202INSULATOR1V4750033803CAP, SPARK PLUG1A4270000134COVER, DUST1A4290000105TERMINAL, SPARK PLUG CAP1A4260000106SPARK PLUG -- BPM-8Y11159010198307

CANADA MODELSSPARK PLUG -- BPMR-8Y11A4250000008BUSHING1156110049209LEAD, IGNITION1V48500082010BUSHING11521150553011FLYWHEEL1A40900021012HUB, FAN1E10100007113COVER, CYLINDER1A16000082014SCREW 5X829001060500815

Footnotes 1: Also Included In REPOWER TUNE-UP KIT

99922203923 - 21 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Ignition, Cylinder Cover

99922203923 - 22 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Engine, Short Block - SB1092

REMARKSDESCRIPTIONQTYPART NUMBERITEMINCLUDES ITEMS 2-21SHORT BLOCK - SB10921SB10921

SCREW 5X254900162050252CYLINDER1A1300007803GASKET, CYLINDER11V1000001904

INCLUDES ITEMS 6-9PISTON KIT1P0210102605RING, PISTON1A1010001406PIN, PISTON1V6060000007CIRCLIP, PISTON PIN2100015046308SPACER, PISTON PIN2100014115209BEARING, NEEDLE 81V55300001010CRANKSHAFT ASY1A01100037111

INCLUDES ITEMS 13-17CRANKCASE KIT1P02100823112OIL SEAL21002124203113DOWEL PIN2V62200002014BEARING, BALL - 62012940353620115GASKET, CRANKCASE111002424203016SCREW 5X2839001620502817

SEE PAGE "Exhaust"SHIELD, EXHAUST11------------------18SEE PAGE "Intake"GASKET, INTAKE11------------------19SEE PAGE "Intake"GASKET, INTAKE11------------------20SEE PAGE "Intake"GASKET, INTAKE11------------------21

Footnotes 1: Also Included In Gasket Kit

99922203923 - 23 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Engine, Short Block - SB1092

99922203923 - 24 - REVISED 12/29/10

Table of Contents Part Number IndexPB-251 Power Blower Labels

REMARKSDESCRIPTIONQTYPART NUMBERITEMLABEL - CAUTION -- HOT1X5050023101LABEL - SPARK PLUG -- BPM-8Y1X5320006712

CANADA MODELSLABEL - SPARK PLUG -- BPMR-8Y1X5320007203LABEL - MODEL -- PB-2511X5030081604LABEL, ECHO1X5020003305LABEL, CHOKE1X5060000806

CANADA MODELSLABEL, CHOKE1X5060000907LABEL, NOISE1X5080001208LABEL, CAUTION1X5050020809LABEL - MODEL -- PB-2511X54700052010

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Table of Contents Part Number IndexPB-251 Power Blower Labels

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Table of Contents Part Number IndexPB-251 Power Blower Gasket Kit -- P021012350

REMARKSDESCRIPTIONQTYPART NUMBERITEMGASKET KIT1P0210123501

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Table of Contents Part Number IndexPB-251 Power Blower Gasket Kit -- P021012350

Click The Page Number After Any Part Number To View The Diagram Containing That Part.PagePart Number

9, 11, 23------------------ .............2310001411520 ............2310001504630 ............1910014319830 ............2310021242031 ............2310024242030 ............1112533942030 ............1112534252130 ............1112534413931 ............1112534452130 ............1112538108660 ............913001642031 ............513100455530 ............513101655830 ............513105156030 ............513120507320 ............913191103460 ............513201049730 ............513201309820 ............513211501461 ............513211544330 ............2115211505530 ............2115611004920 ............2115901019830 ............717721544430 ............717722042030 ............717722742030 ............717722827030 ............717723412220 ............717723644330 ............717724611120 ............1990010008014 ............990010505060 ............2190010605008 ............7, 1390010605014 ............1990016204020 ............9, 2390016205025 ............2390016205028 ............790016304016 ............1590023805025 ............5, 15, 1990025305020 ............1590025305025 ............1590056250005 ............5, 13, 1590060300005 ............790070000004 ............219111304020 ..............139136704012 ..............159154503010 ..............239403536201 ..............23A011000371 ..............11A021001350 ..............7A051001060 ..............7A052000200 ..............23A101000140 ..............23A130000780 ..............21A160000820 ..............15A160000830 ..............9A200000280 ..............9A226000350 ..............9A226000470 ..............9A232000340 ..............9A244000070 ..............13A300000141 ..............13A310000070 ..............13A313000840 ..............13A313000850 ..............13A313001070 ..............13A320000410 ..............5A350000510 ..............5A356000030 ..............21A409000210 ..............21A411000290 ..............21A425000000 ..............

PagePart Number

21A426000010 ..............21A427000013 ..............21A429000010 ..............15A440000770 ..............15A444000020 ..............15C400000471 ..............19C410000390 ..............19C410000400 ..............15C411000010 ..............15C450000240 ..............15C453000260 ..............15C454000130 ..............15C459000010 ..............9C480000070 ..............19E100000070 ..............21E101000071 ..............19E103000451 ..............19E103000461 ..............19E104000080 ..............19E162000000 ..............17E165000170 ..............17E165000180 ..............11P005000100 ..............11P005000190 ..............11P005000250 ..............11P005000270 ..............11P005000280 ..............11P005001000 ..............11P005001240 ..............11P005001260 ..............11P005001270 ..............11P005001660 ..............11P005001670 ..............11P005001890 ..............11P005001900 ..............11P005002000 ..............23P021008231 ..............23P021010260 ..............9P021010980 ..............27P021012350 ..............13P021016930 ..............7P022006850 ..............7P022008260 ..............23SB1092 ......................23V100000190 ..............9V103000390 ..............9V103000400 ..............13V104000820 ..............13V104000940 ..............13V203000190 ..............7, 15V263000070 ..............9V264000050 ..............9V299000250 ..............7V376000900 ..............5V420001430 ..............7V420001440 ..............15V431000000 ..............5V471001220 ..............5V471001860 ..............21V475003380 ..............21V485000820 ..............15V485000830 ..............15V486000070 ..............23V553000010 ..............23V606000000 ..............23V622000020 ..............25X502000330 ..............25X503008160 ..............25X505002080 ..............25X505002310 ..............25X506000080 ..............25X506000090 ..............25X508000120 ..............

PagePart Number

25X532000671 ..............25X532000720 ..............25X547000520 ..............

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Table of Contents Part Number Index

Part Number Index

Click The Page Number After Any Part Desciption To View The Diagram Containing That Part.

AAIR CLEANER CASE ASY.....9

BBEARING, BALL - 6201.....23BEARING, NEEDLE 8.....23BODY, CARBURETOR.....11BOLT.....21BOLT 5.....13BOLT 8X14.....19BULB, PURGE.....11BUSHING.....21

CCABLE, THROTTLE.....15CAP ASY - ORANGE.....5CAP, SPARK PLUG.....21CARBURETOR.....9CARBURETOR -- RB-K85.....11CASE, FAN.....19CIRCLIP, PISTON PIN.....23CLAMP.....19CLIP.....5COIL, IGNITION.....21CONNECTOR, CAP.....5COVER, CYLINDER.....21COVER, DIAPHRAGM.....11COVER, DUST.....21COVER, ENGINE.....15COVER, EXHAUST.....13COVER, HANDLE.....15COVER, THROTTLE.....15CRANKCASE KIT.....23CRANKSHAFT ASY.....23CUSHION.....5, 7CYLINDER.....23

DDIAPHRAGM, METERING.....11DIAPHRAGM, PUMP.....11DIAPRAGM/GASKET KIT.....11DOWEL PIN.....23

EE-RING.....11E-RING 4.....7EXHAUST GUIDE KIT.....13

FFAN.....19FILTER, AIR - DOUBLE LAYER.....9FILTER, AIR - SINGLE LAYER.....9FILTER, FUEL.....5FLANGE NUT 5.....7, 15FLYWHEEL.....21

GGASKET KIT.....27GASKET, CAP.....5GASKET, CRANKCASE.....23GASKET, CYLINDER.....23GASKET, EXHAUST.....13

GASKET, INTAKE.....9, 23GASKET, METERING DIAPHRAGM.....11GASKET, PUMP.....11GRIP, STARTER.....7GROMMET.....5GUARD, FAN.....19GUIDE, CABLE.....9GUIDE, EXHAUST.....13GUIDE, EXHAUST - INNER.....13GUIDE, EXHAUST - OUTER.....13GUIDE, ROPE.....7

HHANDLE, LOWER - INNER.....19HANDLE, LOWER - OUTER.....19HANDLE, UPPER.....15HUB, FAN.....21

IIGNITION SWITCH ASY.....15INSULATOR.....9, 21

KKNOB.....15

LLABEL - CAUTION -- HOT.....25LABEL - MODEL -- PB-251.....25LABEL - SPARK PLUG -- BPM-8Y.....25LABEL - SPARK PLUG -- BPMR-8Y.....25LABEL, CAUTION.....25LABEL, CHOKE.....25LABEL, ECHO.....25LABEL, NOISE.....25LEAD, GROUND.....15LEAD, IGNITION.....21LEVER, METERING.....11LEVER, THROTTLE.....15LID, AIR CLEANER.....9

MMUFFLER.....13

NNEEDLE - HIGH SPEED.....11NUT 6.....9

OOIL SEAL.....23O-RING.....11

PPAWL.....7PIN, METERING LEVER.....11PIN, PISTON.....23PIPE, FUEL - 3X5X175mm.....5PIPE, RETURN - 3X6X85mm.....5PIPE, VENT - 3X5X50mm.....5PISTON KIT.....23PLATE, PREVENT.....9PLUG.....11PULLEY.....7

PURGE BASE ASY.....11

RREPAIR KIT.....11RETAINER.....7RETAINER, PURGE BULB.....11RING, PISTON.....23ROD, THROTTLE.....15ROLLER, GUIDE.....11ROPE, STARTER - 3X700mm.....7ROTOR COVER ASY.....11

SSCREEN.....13SCREW.....7SCREW 3X10.....15SCREW 4X12.....13SCREW 4X16.....7SCREW 4X20.....19SCREW 5X14.....7, 13SCREW 5X20 - TAPPING.....5, 15, 19SCREW 5X25.....9, 15, 23SCREW 5X28.....23SCREW 5X60.....9SCREW 5X8.....21SCREW, DIAPHRAGM COVER.....11SCREW, METERING LEVER PIN.....11SCREW, PURGE BASE ASY.....11SCREW, RETAINER.....11SCREW, ROTOR COVER.....11SCREW, THROTTLE ADJUST.....11SHIELD, EXHAUST.....13, 23SHORT BLOCK - SB1092.....23SPACER ASY.....7SPACER, PISTON PIN.....23SPARK PLUG -- BPM-8Y.....21SPARK PLUG -- BPMR-8Y.....21SPRING, METERING LEVER.....11SPRING, RETURN.....7SPRING, REWIND.....7STARTER PAWL ASY.....7STARTER, RECOIL.....7STRAINER.....11SWIVEL.....11

TTANK, FUEL.....5TERMINAL, GROUND.....15TERMINAL, SPARK PLUG CAP.....21THUMB SCREW.....9TRIGGER, THROTTLE.....15TUBE, BLOWER - NOZZEL.....17TUBE, BLOWER - STRAIGHT.....17

VVALVE, INLET NEEDLE.....11VENT ASY.....5

WWASHER.....5, 9, 13, 15, 19

99922203923 - 29 - REVISED 12/29/10

Table of Contents Part Number Index

Part Description Index

ECHO, INCORPORATED400 Oakwood Road

Lake Zurich, IL 60047 USA

WWW.ECHO-USA.COM