Delco Remy 12V 50A 5SI Alternator 19020707

The Delco Remy 5SI alternator is a 12V, 50A unit with part number 19020707. It is listed as a new alternator with an internal regulator, a 4 groove pulley, and an environmentally coated finish, making it a practical replacement option where the original application calls for this specific style and output.

Key physical details include a single leg alternator mount, 31mm mount leg thickness, 154mm mount centre to centre, and 10mm pivot and adjusting holes. The pulley outside diameter is 50mm, and the unit weighs 3.4kg. Those measurements matter when you are checking bracket alignment and belt setup before purchase.

This alternator is identified as suitable for Mercury Marine applications and is marked to suit Delco units. It belongs to the 5SI series and carries Pin Code IR44. If you are replacing an existing unit, matching the part number and mounting details is the safest way to confirm you are selecting the correct alternator.

Key Features

• 12V, 50A alternator
• Delco Remy 5SI series
• Internal regulator
• 4 groove pulley
• Single leg mount
• Environmentally coated finish

Specifications

• Brand: Delco Remy
• Part No.: 19020707
• Voltage: 12V
• Power Rating: 50A
• Series: 5SI
• Regulator Type: Internal
• Alternator Mount: Single leg
• Pulley Section: 4 groove

Fitment guidance

• Listed to suit Mercury Marine applications.
• Designed for Delco applications where the 5SI configuration and 19020707 part number match.
• Check the single leg mount, 154mm mount centre to centre, and 10mm pivot and adjusting holes against the existing unit before ordering.

Application and Buying Notes

Confirm the part number first if you are replacing an existing alternator. This unit is identified as Delco Remy 19020707, and it is a 12V, 50A 5SI alternator with an internal regulator. Matching the part number and regulator style is the most reliable way to narrow the selection before you compare mounting dimensions.

The mounting measurements are important on this alternator: single leg mount, 31mm mount leg thickness, 154mm centre to centre, and 10mm pivot and adjusting holes. If any of those points differ from your current unit, the alternator may not sit correctly in the bracket or line up with the belt path as intended.

The pulley is a 4 groove design with a 50mm outside diameter. That needs to be checked against the belt setup already on the engine or marine application. The unit is also listed as environmentally coated and weighs 3.4kg, which can help when comparing like-for-like replacements, but the safest approach is still to verify the physical match before fitting.

This alternator is noted for Mercury Marine applications and is marked to suit Delco units. Because fitment is not expanded with a full model list here, use the existing alternator or application details as your reference point. If you are unsure, compare the old unit’s part number, mount style, hole sizes, and pulley section before you order.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number 19020707 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type ALTERNATOR, Unit of Measure EACH, Warranty One Year, Mount Leg Thickness 31mm, Pivot Hole Diameter 10, Pulley Outside Diameter 50mm, Regulator Type Internal, Suits Unit Make Delco, Note 5SI. Environmentally Coated, Mount Cnt to Cnt 154mm.

Additional published details for cross-checking include Weight 3.4kg, Product Group 1 ROTATING ELECTRICAL, Part No. 19020707, Brand DELCO REMY, Description Delco Remy Alternator 12V 50A 5SI, Adjusting Hole Diameter 10, Pin Code IR44, Power Rating (Amp) 50, Pulley Section 4 Groove, Series 5SI.

Delco Remy Alternator 12V 50A 5SI. Part number 19020707 should be checked first. Listed voltage is 12. Listed output rating is 50. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Single Leg. Regulator type is Internal. Pulley configuration is 4 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 19020707, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a alternator in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 and output 50 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Where no verified application list is available, the part number, mounting details, connector style, and published specifications should be used as the primary selection criteria.

In the absence of a verified fitment list, the safest approach is to compare the removed unit directly with the listed product details. That includes checking the housing style, pulley layout, regulator arrangement, and any visible identification numbers before supply is approved.

Compatibility note: Please confirm fitment by matching part number 19020707, the 5SI series, 12V 50A rating, single leg mount, 154mm mount centre to centre, 10mm holes, and 4 groove pulley details against your existing alternator or application records before buying.

FAQ

What is the part number for this alternator?

The part number listed is 19020707.

What voltage and output does it have?

It is a 12V alternator with a 50A power rating.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What pulley setup does it use?

It has a 4 groove pulley with a 50mm outside diameter.

What mounting details should I check?

Check the single leg mount, 31mm mount leg thickness, 154mm mount centre to centre, and 10mm pivot and adjusting holes.

What applications is it listed for?

It is listed to suit Mercury Marine applications and is identified as suitable for Delco units.