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Diff. Lube


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28 replies to this topic

#21 ColmerL

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Posted 10 October 2017 - 10:45 PM

Looking forward to your report Moxy.



#22 EdR

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Posted 12 October 2017 - 06:39 PM

I went ahead and I'm going to try this. I cleaned what I could of the grease out of the propel and added the oil. Does sound quitter . Makes sense too. Like some of you have said, couple spins and the grease is no longer effective. Looking forward to on the water test.
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#23 Mike13695

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Posted 21 October 2017 - 03:46 PM

This is the stuff I've been using. The file was too big for a picture, it's Lubriplate No. 105 outboard motor lube for gear cases of non shift motors .I agree, gear oil would work . Most gearboxes in industry are vented,I think to prevent pressure build up. Keep an eye on the seals for leakage, try not to overfill.
See Mikem's post #9 and #11.

#24 Moxymo

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Posted 13 November 2017 - 05:09 PM

After the discussion of using gear oil instead of grease for the propel unit , I didn’t hesitate to switch . I went to Wal-Mart and purchased a quart of synthetic blend 75w-90 differential oil and used 8 oz ( total ) for the upper and lower gear boxes . I’ve never had water in my gear box and saw no reason it would be a problem now . After putting it in , I went to the lake for a test . The temperature was 50 and the water temperature was 54 . I used a fish finder with gps for testing . At 2.5 to 3.3 mph it was effortless ( litterly just going through the motions ) like on an Exercycle . At 3.5 mph there was enough effort to say it was sustainable for a couple of hours nonstop without being too tired . At 4 mph I would say 15 minutes would be the most I could do . My top speed was 4.6 mph which is a sprint in the propel 13 and wouldn’t be doable for more than a couple of minutes . Before using the gear oil it felt like a sprint uphill pulling a sled to go 4 mph and 30 minutes at 3.5 mph left me tired .

My kayak had my fishing gear which weighs about 25 lbs and me at 185 . Using a gps before the gear oil it was difficult to tweak a speed of 4 mph . Now 4.6 mph is attainable without all out effort . The groaning sound is barely there on maximum efforts so that also is an improvement . My impression is that oil is what the propel unit needs and not the grease that comes off and makes the effort get greater and sound get louder as mileage increases .


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#25 Hannzo24

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Posted 14 November 2017 - 01:15 PM

So what is the process to fill up the drive with oil?



#26 Bighitdhracer

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Posted 27 November 2017 - 03:06 PM

Got back from my first trip using 75 90w gear oil in the lower cartridge, upper + lower gear boxes and so far i'm impressed with the results. The drive is much smoother and more importantly much quieter. I had just replaced the cartridge seal and all three cartridge bearings so that may have also added to some of the smoothness. Water temperature was 47 degrees and I didn't notice any more resistance with the gear oil over the finishline grease. I will continue to update as one trip isn't enough time to come to an conclusions for it long term performance. 



#27 YakDude

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Posted 03 December 2017 - 04:55 PM

I made the plunge and put gear oil into the peddle unit of my 2015 Native Propel 13. I haven’t tested it out on the water yet, but will update after my “maiden” voyage
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#28 YakDude

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Posted 10 December 2017 - 11:44 PM

Went out today for first time after adding gear lube to Propel unit! What can I say, smooth as butter! I’ll keep an eye on things and add more observations later. Since this is uncharted territory, I plan to keep an eye on the unit for leakage and will refresh the gear lube annually. I feel good knowing that the Propel gears are constantly being lubricated.

#29 sgtryanusmc

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Posted 18 December 2017 - 09:11 PM

I did mine probably 20+ hours ago and it is nothing but better.  I used gear oil on the lower and Lucas Marine Grease on the top.  It's time to inspect the top but it feels great, smooth, quiet and no leaks. I would go, and still might, with adding gear oil to the top but there has to be grease too.  There is certainly a passage between the upper and lower.  I had my drive flipped around once while I was working on it and the gear oil traveled into the upper - it was upside down. 

I've had my share of drive problems.  This is my third drive.  First came with no grease, second had saltwater intrusion, both in the first usage period - before I needed to open it the first time to lube and inspect.  This one is much mo betta especially with this lube method.






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