C28 Shaft Size and Packing Material size

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NautiTug

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Need to replace my stuffing box packing. Does anyone have a recommendation on packing material/ size and c28 shaft Size?

Thanks
 
NautiTug":2w9g9wwx said:
Need to replace my stuffing box packing. Does anyone have a recommendation on packing material/ size and c28 shaft Size?

Thanks
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Hello,

The shaft size is 1.5", we dont have the packing size as that is built by Marine Hardware. Typically when re-packing the glad you can remove and pair up at a marine store close by. Hope this helps.

Thanks,
 
1 1/2” shaft would use 1/4” packing 3 rows.
 
Thanks Kevin and Brian!
 
Brian: Do you have a preference on packing material to us? After going down a google rabbit hole I am now afraid I am over analyzing the choices?
 
Just ordered the packing material from marine hardware, ask for Ron, extremely knowledgeable and helpful. Just don't talk about the weather if you live in Florida! Just kidding but he did threaten to hang up on me when I told him it was ONLY 72 and I couldn't use my pool today. Very nice people! 😀
 
Nautitug and CaptT: Curious about how many hours were on your engines when you determined you should replace the packing.

Gini
 
My boat had 500 hrs and was 5 years old. Because it's on a trailer, and very easy to do,, I decided to change the packing out secondary to my surveyors suggestion to start with fresh "everything ". We are also planning multiple long cruises to the Keys, Bahamas, Jacksonville, etc. which helped in my decision.
 
I purchased 1/4" GFO packing....truly struggling to get it repacked. any tips?
 
Cut each "round" 3/16 short, place first space at noon, next round with space at 4 o'clock, next round with gap at 8 o'clock. Snug in gently, praying to Neptune.
 
I use a 1' long 1 1/4" diameter PVC rod .Mcmaster-Carr sells it by the foot or it can be obtained from many other venders. Using a properly sized rod will make it easier to cut the proper length to fit the prop shaft. The PVC rod , now your mandrel, wrap the packing around the rod, using a new sharp blade in a utility knife cut the packing at the intersect point 45 degree angle. Make sure the cut is clean and the ends match up making a perfect circle around the rod. I usually make several packing rings for one shaft gland repack. I pick the best three to start with and others as a back up in the event that I damage one during installation. The install will require the first (1) ring ends to be located at 12 o'clock the next ring ends (2) at 3 o'clock , and the lasting ends (3) 6 o'clock . To help push the packing in place cut a small piece of 1 1/4" PVC pipe. Cut the length short enough that it will fit in the working area . After the length is cut then cut an opening so it can be fit over the shaft. Place the packing in the gland nut the use the cut PVC pipe to help push the packing in place evenly. Once that ring is installed repeat the steps with the next 2 rings. When the rings are installed properly then thread the gland nut onto the gland. I thread the nut on to the point of packing material to gland contact. The rest of the adjustment is done in the water. DO NOT OVER TIGHTEN THE PACKING. The biggest mistake most boaters make when adjusting the packing nut is over tighten it. Make a mark on the top of the packing gland at 12 o clock. Make a mark on the top of the packing nut inline with the mark on the gland. These marks are your reference marks for adjustments made to the packing. I never move the packing nut more than a 1/32th of a turn at a time. The starting point mark is at 12 o clock. 3 o'clock would be a 1/4 turn. In my 4 adjustments of my packing gland in 650 hrs of engine operation I have tighten the packing nut to 2 o'clock. That is less than a 1/4 turn. A packing gland that is adjusted tight will not last long and could score and damage the shaft. Packing if properly adjusted with proper lubrication should easily last 1000 to 1500 hrs. A gland that is run tight will be lucky to make 300 to 500 hrs. Gland that has had an inexperienced person adjusting it will last less than that and probably damage the shaft.

My references are for a 1 1/4 " shaft. If the shaft dimension is 1 1/2" use the above listed materials to accommodate 1 1/2" or if the shaft size is smaller use smaller size. I have made up different size mandrels for different size shafts over the years and kept them in my tool box for future use. Keep the mandrel and installation sleeve along with a length of packing on board the boat for future insurance.
 
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