Rotary Replacement Jackshaft, Mandrel, Spindle Assembly For Murray 1001200 With Grease Zerk., reviews, comments

Jackshaft Housing Assembly Replaces Murray 1001200, MTD 1001046. Fits 2001 models and up. For riding mowers. Includes shaft with grease zerk.

1001200 Jackshaft Assembly for Lawn Mowers ,(by Rotary) - has a working grease zerk fitting, properly installed. The grease fitting is in place (under the deck), and the passage hole allowing the grease to pass through the alunimum housing to lubricate the bearings - HAS BEEN DRILLED - (OPEN). (By Rotary) - Best
1001200MA Jackshaft Assembly for Lawn Mowers (by Murray) - has a dummy grease zerk fitting, for cosmetics only. The grease fitting is in place (under the deck), but the passage hole allowing the grease to pass through the alunimum housing to lubricate the bearings - HAS BEEN DRILLED - (OPEN). (By Murray)
NOTE: The grease cannot lubricate the bearings, because the ball bearings are sealed, so I removed the inner seals from the bearings using a small screwdriver to pry with, before I installed the 1001200 jackshaft housings. Using the zerk fittings, grease can then flow into the bearings, but not past the outer bearing seals - which I left in place.
NOTE: Two of Murray 690411MA Blade Adapter is also required for Murray Riding Mowers below 2002 year models.

Product seems to be made of reasonable quality... Bearings seem to not be smooth as glass, but you can feel sight bumps when you rotate shaft.
Most importantly... If you need the blade adapter (it does not come with it) the Briggs number is 690411ma... Fits like a glove. That was difficult to find so I thought I would put here for others.

Fit my 2002 Murray 425008x8A 42" deck perfect, Part number in my manual was 1001200 and this is a great replacement. Local stores wanted $45 each. It does not come with the blade adapter (not supposed too), its a washer with splines that centers the blade and gives you a surface to bolt against. Mine were missing from my old housing so I ordered replacements locally.

Per other reviews I removed the inner seal of the bearings so when I pump grease in the housing it actually gets to the bearings.

Please closely review the zerk fitting, this product has a zerk fitting but the bearings are sealed, so it does no good. The previous reviewer that mentioned the zerk vs non zerk has the right idea but since both are sealed bearing the zerk fitting has no function, on either.

Just buy what ever is cheaper.

On another note this product seems to be a fine replacement for my original murray mandrel or quill or jack shaft, what ever you want to call it.

Hope you found this review helpful

This product arrived promptly and as described, it has functioned well so far (one 2 acre mowing).. That said, it would not accommodate the original mounting bolts which had to be replaced with smaller diameter bolts. Also, save the spacer upon which the blade mounts, a new one does not come with this item..

Just what I needed, at a reasonable price, delivered in a timely manner. No problems with installation.

Excellent transaction, Quick delivery, Product as stated. Highly recommended!


This was a great fit on my 2003 Murray 42" riding mower. Almost all of the bolts all sheared off my old one when I went to take it off so make sure to get new self tapping bolts to go along with this.

it works perfect as it should and I've used it many hours so far.

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