MerCruiser Bravo One Prop Shaft Replacement | MerCruiser Bravo One Output Shaft Removal | Boats.net

See how to replace the prop shaft on a MerCruiser Bravo One outdrive lower unit in this video from Boats.net.
MerCruiser has changed the assembly on the propshaft for this unit. A few parts have changed, and John will explain and we’ll get into the upgrade.
After we drain the lower unit, the disassembly starts by getting the old lockring off and the bearing housing out. We’re using a lockring tool from Marine-Tech to get the lockring out.
With that done, we have some work to do on the old output shaft. A washer underneath the bearing will be reused on the new output shaft, so we’ll need to use a press to get the old bearing off. With that done, we’ll add the washer and a new bearing to the new output shaft and get started putting everything back together.
This is a slightly different assembly, and John will walk you through it. However, we did have some difficulty getting the lockring all the way down. We’re going to use a thread chaser to clean the threads and then finish reassembling the unit.
Parts and diagrams for the Bravo One: www.boats.net/catalog/mercrui...
Check out the parts we used here:
Tapered roller bearing assembly: www.boats.net/product/mercury...
Propshaft: www.boats.net/product/mercury...
Bearing carrier: www.boats.net/product/mercury...
VIDEO HIGHLIGHTS:
Introduction - 0:00
Draining the lover unit - 2:40
Removing the old prop shaft - 3:45
Extracting the bearing carrier housing - 6:20
Explaining new prop shaft assembly - 7:30
Removing bearing from old propshaft - 9:00
Pressing bearing onto prop shaft - 11:24
Installing new prop shaft and housing - 12:00
Installing locking ring - 15:00
Using thread chaser - 18:00
Complete assembly - 20:00
Torquing the lockring - 23:00
Find Mercury sterndrive parts here:
www.boats.net/catalog/mercury...
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In the video we’re working with a MerCruiser Bravo One sterndrive, but you may have similar steps for your MerCruiser sterndrive. If you’re not sure whether these steps apply to your motor, leave a comment and we’ll get back to you.
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