Motor, Century, 0.75 Horsepower, 115v, 2 Speed, 48 Frame | BN36

💧 Motor, Century, 0.75 Horsepower, 115v, 2 Speed, 48 Frame

Made by Century, manufacturer part number BN36. It is listed for the equipment shown below, so check the model on your own unit against that list. If your old part carries one of the cross-reference numbers further down, this is listed as its alternative.

✅ Listed for

• Pentair Sta-Rite JW/JW Above-Ground/JWPA Series Pump
• StaRite LT Series Pumps
• StaRite Dura-Jet JT Series Pumps
• JCM K KM Series Pumps Jacuzzi J
• LC LCUN2 LT LX LTC LCU LTCU LCM ULCU ULTCU Jacuzzi L
• Jacuzzi L3 & L25 Model Pumps
• Jacuzzi LH & LTH Model Pumps
• LPC LTPH Model Pumps Jacuzzi LPH
• LR9 LR3 LR6 Model Pumps Jacuzzi LR
• LR9 LR3 LR6 & LR25 Model Pumps Jacuzzi LR
• Jacuzzi SLPH & SLTPH Model Pumps
• Jacuzzi SharkJet Series Above Ground Pool Pump
• Pentair American Products Maxim Pump
• Pentair PacFab Dynamo Pump
• Waterway Center Discharge Pool Pump (4 Screw Faceplace)
• Waterway Center Discharge Spa Pump (4 Screw Faceplate)
• Waterway Supreme 48-Frame Above Ground Pump
• Waterway Workman 48-Frame Above Ground Pump
• Waterway E-Series Wet End (6 Screw Faceplate)
• Gecko Aqua Flo Flo-Master FMHP/FMCP Series Spa Pump
• Aqua Flo Tub-Master TMCP Series 100% Drain Bathtub Pump
• Aqua Flo Flo-Master FMVP Series Vertical Mounted Spa Pump
• Vico SuperFlo Dual-Discharge Pump
• Vico UltraFlo Pumps
• Premier Spring Water Spa II Center Disch Spa Pump Pre-1989
• Premier Spring Water Spa II Side Disch Spa Pump Mfg Pre-1989
• Premier Spring Water 320 & 325 Side Disch Spa Pumps 1989+
• Premier Spring Water 225 MK2 Series Pump
• Speck Pumps Model E71 Above-Ground Pool Pump
• Jetted Bathtub Pump Speck Pumps Model E45
• Spa Pump Speck Pumps Model E75

🔄 Cross-reference part numbers

These part numbers are listed as alternatives for this part.

CAT: BN36 MODEL: 177781 TYPE: SPM FR: R48Y HP: SF: PH: 1 HZ: 60 RPM: 3450/1725 ROT: CCWPE

VOLTS: 115 AMPS: 8.8/2.6 MAX AMPS: SF AMPS: TIME: CONT ENCL: ODP THERMALLY PROTECTED FORM: CODE: Y INSUL CLASS: B AMB.: 40

• 12 & 3 O’clock Conduit Entries
• 40°C Ambient • Class B Insulation
• Rotation: CCW Pump End
• Through Bolt Mount
• 48/56 Base Mounting
• 3-1/2” Shaft Height
• Four Thru Bolts on a 5.146 Bolt Circle

Century replacement spa pump motor – 3/4 HP, 115V, two speed, 48Y frame

⚙️ What this motor is

This is a replacement motor only, not a complete pump. It is a thru-bolt motor, which you can recognise by feet underneath and four long bolts that pass right through the motor into the wet end. It is a 48Y frame with a threaded shaft. It runs on 115V, two speed. It bolts to the wet end you already have, so the pump housing, impeller and plumbing stay where they are.

✅ Check these before you order

• Compare total horsepower, not nameplate horsepower. Multiply the horsepower on your old motor’s label by the service factor next to it, and compare that figure. This motor is rated 3/4 HP.
• Mounting. Thru-bolt motors suit spa, jetted tub and above-ground pump wet ends, and do not fit square flange pumps, so check yours matches before ordering.
• Frame size. Measure between the thru-bolt holes: about 3-5/8 inches apart is a 48 frame, about 4-1/8 inches is a 56 frame. Measuring beats reading the old label, because some makers labelled 48 frame motors as 56. This one is a 48Y frame.
• Shaft. This motor has a threaded shaft. A threaded shaft has the impeller screwed straight onto it; a keyed shaft is smooth with a groove down it. The two are not interchangeable.
• Voltage. This motor is 115V. Read it off the old motor’s label rather than assuming from the wiring – a spa wired for 240V can still run a 120V pump.

🔧 When you fit it

• Fit a new shaft seal at the same time. A failed shaft seal lets water into the motor and is the most common reason a motor dies. Reusing the old one on a new motor is the quickest way to ruin it.
• Rotation. Pool and spa motors turn counter-clockwise seen from the shaft end, shown on the label as CCW or CCWPE. They cannot be reversed by swapping wires, so check the old label if it says anything different.
• Keep the horsepower the same unless you are changing the impeller too – the impeller is matched to the motor’s output.

🔩 Technical specifications

🔧 Parts and fittings for this