Mercruiser alpha bravo upper unit rebuild - PART 4

[@DIYwithMichaelBorders]

If interested in purchasing these products, visit our Amazon affiliate links below. I earn from qualifying purchases. 1. GLM oil seal kit (87500) amzn.to/3njQWrT 2. Gasket compound sealant (1525607) amzn.to/3DcrJ8c 3. CDI inch pound torque wrench kzbin.info/www/bejne/Y3m5optqd6xjr7c 4. Inch pound torque wrench amzn.to/3G1aDLl 5. VERY IMPORTANT - Differences in New gear/bearing vs. Old gear/bearings

[@theinternetelectrician]

Excellent and informative video! From one Creator to another, well done! (I'm watching the entire series) This step has got me spooked a little. I had to replace my gimbal bearing in the summer of 2021. At that time the U-joints were OK, despite being soaked in salt water after the bellows failure that led to the gimbal bearing breakdown. In hindsight, should have replaced them then, as this season a noticeable change happened in the form of some growling vibration when turning or trimming, so off came the leg again for inspection. Bellows and gimbal are OK, no water, but there was gear oil that had got past the gear case and into the bellows. Not much, only down to the add line in the reservoir so maybe a 1/2 quart or less. So I took it apart, got the cross and bearings apart and one of the 8 U-joint bearings was destroyed. The other 7 were still greased and functioning. One of the O-rings that seal the shaft through the gimbal was chewed away, (I assume from the vibration?) the other intact. So upon dis-assembling (with the help of your video), I also noticed that the final part (ring) before the bearing retainer and after the large O-ring was not there from a previous repair prior to my owning the boat. Then watched this video and with the process to assemble needing the special tools (the big retainer wrench and the inch-pound torque wrench) that I don't have (but managed thus far without) are not worth it for me to purchase as a one-off, and I'll book a time at our Marine Mechanic to re-assemble the leg for me. After all that back-story, is there any reason that I would not re-use my bearings, sleeves, gears and shafts if they show no wear, and just replace the oil seal, o-rings, pre-load washer, etc, rather than all new parts as you did?

[@DIYwithMichaelBorders]

Thanks for watching, we really appreciate that. Sounds like you’ve been busy and we sit here thinking to ourselves…it would be fun to join you during your project. If your gears and bearings look good…no cracks, corrosion, missing teeth…you can continue to use them. We love servicing boats and jet skis. Many more helpful videos to come, we promise. 😎👍

[@theinternetelectrician]

@@DIYwithMichaelBorders Thanks for getting back to me! As I understand it then, with the old style slip fit bearing, all I need to do is replace the washer (and seals, o-ring, etc.) and torque to 80 ft.-lbs? No need to do the rolling torque with precision inch-pounds wrench? Mines an Alpha one, gen 2

[@DIYwithMichaelBorders]

@@theinternetelectrician We are happy to help, by referencing your exact serial number service manual, it’s extremely likely that’s 100% spot on…between 80-90ft lbs We went with the new gear and bearing set which required the rolling resistance. 😎👍🧰

[@michaelpinnola9935]

Quick question - i didnt see any shims or spacers go back on? Is that normal? Are they needed?

[@DIYwithMichaelBorders]

Michael, thanks for watching. Great question and we strongly recommend referring to your exact serial number Service Manual for the spacer/shims guide. Following your exact guide will ensure it’s done properly. We chose to not cover that because we didn’t want to give any wrong info…as it will be different from serial number to serial number. Let us know if you have any questions and hey if you’re into crypto trading, join our DIY ecosystem. toolboxtoken.com Reach out to us any time! 🧰

[@Drew9A]

Just to verify, I need to torque the new nut on old gears to 80 ft lbs? Not 8 in lbs?

[@DIYwithMichaelBorders]

Thanks for watching & welcome to the DIY Raptor Club. Per our exact serial # service manual, our unit required a rolling resistant of between 6-8. We have talked to others that say that equivocates to roughly 70ft pounds however we have not fact checked that. Following your service manual is best. Please keep us posted on your project.

[@MarkyGardea]

What part number would i need for the gear and bearings?

[@DIYwithMichaelBorders]

Thanks for watching, we can hopefully help. Our replacement p/n gear set for our exact alpha outdrive 1.98 gear ratio is: 43-803101T It’s import to know that we switched to the newly designed Press-Fit gear and bearing set. Below is additional helpful p/n info If interested in purchasing these products, visit our Amazon affiliate links below. I earn from qualifying purchases. 1. GLM oil seal kit (87500) amzn.to/3njQWrT 2. Gasket compound sealant (1525607) amzn.to/3DcrJ8c 3. CDI inch pound torque wrench kzbin.info/www/bejne/Y3m5optqd6xjr7c 4. Inch pound torque wrench amzn.to/3G1aDLl

[@ej.Sal14]

Good afternoon! When you say to torque down the old gear to 80lbs, is that foot-pounds or inch-pounds?

[@ej.Sal14]

Also, great videos! Seems to be the best series on rebuilding the upper.

[@DIYwithMichaelBorders]

Thanks for watching & welcome to the DIY Raptor Club. 80ft lbs. 😎👍

[@DIYwithMichaelBorders]

@@ej.Sal14 We really appreciate that, we are just shy of releasing our lower unit rebuild series. You may find it helpful. 😎👍

[@sezkza4926]

Hay i have alpha one gen 2 How much should I tighten the nut?

[@DIYwithMichaelBorders]

Thanks for watching, by chance do you have your serial number service manual? We don’t want to give you a number that ends up not being right…we haven’t serviced a Gen 2 in awhile however if we remember correctly, it’s the same. It’s best to double check your service manual though. 👍🧰

[@DevilsInBaggyPants1941]

Do you have a part number for the yoke and shaft assembly?

[@DIYwithMichaelBorders]

Thanks for watching, if interested in purchasing this product, visit our Amazon affiliate link below. I earn from qualifying purchases. amzn.to/3R8NOvf 😎👍

[@DevilsInBaggyPants1941]

@@DIYwithMichaelBorders thank you brother!!

[@DIYwithMichaelBorders]

@@DevilsInBaggyPants1941 😎👍

[@brucemillar3015]

Hello!

[@DIYwithMichaelBorders]

Good morning Bruce, great to hear from you. Hope all is going well. 😎👍🔧🔩

[@Drew9A]

Just to verify, I need to torque the new nut on old gears to 80 ft lbs? Not 8 in lbs?

[@DIYwithMichaelBorders]

Thanks for watching & welcome to the DIY Raptor Club. Per our exact serial # service manual, our unit required a rolling resistant of between 6-8. We have talked to others that say it equivocates to roughly 70ft pounds however we have not fact checked that. Following your service manual is best. Please keep us posted on your project.