Crankshaft suitable for: Husqvarna 142R 142RB 143R 152RB 152RJ 153R; JONSERED BP2052 GC2042

This Husqvarna 143R crankshaft – a non-original part that replaces the original crankshaft 531007759, also marked 531 00 77-59.

It fits Husqvarna 142R, 142RB, 143R, 152RB, 152RJ and 153R brushcutters and Jonsered BP2052 and GC2042 models. The Husqvarna and Jonsered parts diagrams for these models use the same 531 00 77-59 crankshaft.

Fits Husqvarna Models
Husqvarna 142R
Husqvarna 142RB
Husqvarna 143R
Husqvarna 152RB
Husqvarna 152RJ
Husqvarna 153R
Fits Jonsered Models
Jonsered BP2052
Jonsered GC2042

Original part numbers:

531007759
531 00 77-59
Important: Not suitable for Husqvarna 143R-II

This shaft is not suitable for Husqvarna 143R-II.

Although the model name is almost the same, the Husqvarna 143R-II uses a different crankshaft – 585153001.

In short:

Husqvarna 143R → 531007759 – fits
Husqvarna 143R-II → 585153001 – not suitable

This should be stated directly in the product description, so the customer doesn't only discover the difference when the engine is already disassembled on the table.

Related Engine Parts

In the Husqvarna 142R parts diagram, the following separate parts are listed together with the crankshaft:

Crankshaft key – 531002402 / 531 00 24-02
Upper needle bearing – 531007757 / 531 00 77-57
Crankshaft bearings – 738220225 / 738 22 02-25

When replacing the shaft, it's worth checking these parts; however, they are not considered part of the shaft kit unless otherwise specified in the product contents.

Installation

Replacing the crankshaft requires disassembling the engine. Before reassembly, check both main bearings, seals, the connecting rod, the needle bearing and the crankcase.

The shaft should not be hammered into the bearings with a hammer. Use appropriate pressing or pulling tools to avoid damaging the new bearings and the shaft itself.

After assembling the crankcase, rotate the shaft by hand. It should turn smoothly, without sticking and without noticeable lateral play.