Spaghetti seal

[byacey]

Re: Spaghetti seal

After looking at the different permatex products, I think I'll try the #1 or #2 gasket maker, or perhaps Motoseal grey, a solvent based cement.

 

[OBJ]

Re: Spaghetti seal

Bill, are you sure it's leaking at the carrier and not some place else? Some soapy water will tell you or just dunk the whole thing in water.

 

[Wizard1]

Re: Spaghetti seal

I have another question. I am going to tackle this job in the next week or so and was wondering if it would be better if I removed the lower leg from the motor so I can turn it over to work on the gear case or is it ok to just turn the whole motor over?

 

[OBJ]

Re: Spaghetti seal

I would remove the lower unit Wizard. You can then take a "C" clamp and fasten the lower unit upside down on the edge of the work bench. Fasten it there with the clamp on the anti-cav plate. And if it's been awhile since the impeller has been changed out, now would be the time to do that also.

 

[byacey]

Re: Spaghetti seal

Yep, I put it underwater and it's bubbling right where the seal carrier meets the housing seam of the two halfs of the case.

 

[OBJ]

Re: Spaghetti seal

Do you have the right size oring Bill? Is everything clean....all old compound removed? Might take a look and make sure the curved part of the two halves are not spung out....the part that goes around the seal head. And make sure you leave that 1/32" piece on each side.

 

[byacey]

Re: Spaghetti seal

No, everything was pristine, cleaned with laquer thinner, everything fits tight. I think the gasket thinner is too thin and runny, and it doesn't really set up. It stays kind of gooey wet even after several days.

 

[byacey]

Re: Spaghetti seal

The Permatex Motoseal Grey works good, I'll just have to give it the longevity and oil resistance test now.

 

[G DANE]

Re: Spaghetti seal

How much pressure do you use when testing ? I only had two of these apart, used the 1/32 excess length trick on spagetti seal, and universal liquid gasket, silicone type. Know the owners, none of them leaked af mee and none ever did since. The never 25 HP hasnt even got spagettiseal or grove for it, they seal with the gasket maker, no problem. Let it cure well before testing and check you only use slight pressure. Change shaft seal and polish shaft so you are sure it isnt there.

 

[byacey]

Re: Spaghetti seal

5 to 7 psi is what I used for testing. I was avoiding using silicon based products because numerous people here warned me that the gear oil would break it down and cause it to leak after time. The motoseal is a xylene based product that becomes semi-hard, kind of like flexible putty. It's recommended for crankcase seams, transmission cases etc, and is not affected by gasoline, so it should be fine for gear oil.

 

[byacey]

Re: Spaghetti seal

well, this things been holding pressure for well over a day now at 6 psi. I just put the oil in. Now we see the real test results, more to come. Don't change that channel!

 

[Wizard1]

Re: Spaghetti seal

I have one a few more questions. First, when I pulled the gearcase apart I found what can only be described as a "glob" of what appears to be grease on the gearhead. Do I need to use a grease of some kind when reassambling the gearcase? Second, it took me over an hour, 2 screw drivers (I actually broke the tip of the screw driver) and 2 screw driver bits(both broke) to get 4 of the screws out. Do these need to be torqued down so tite? And what type of screws are recommended to replace the ones that the heads are messed up on?<br /> Sorry for the simple sounding questions but I want to make sure I do this right the first time. Thanks

 

[OBJ]

Re: Spaghetti seal

No grease that I know of Wizard.<br /><br />An impact wrench usually gets these screws lose. They get frozen in after a while. A coat of gasket sealing compound on the screw threads usually helps prevent this.

 

[Wizard1]

Re: Spaghetti seal

I have one more problem. I was checking the drive and shift rods for any slack and found that the o-ring and bushing for the shift rod is worn out which would account for some of the water I have found in the gear case. The problem is that the bushing (made of brass) is no longer being made. Can anyone tell me where I can get one of these? The motor is a 57' fastwin 18hp (model # 15020)and the part number for the bushing is 301878 according to my marine shop. <br />Thanks

 

[Paul Moir]

Re: Spaghetti seal

Best be starting your own post there Wizard1. We're starting to go off topic.<br /><br />I honestly never had that problem with 3H and I'm really sorry you did. It's always worked for me flawlessly. I don't think you'll have trouble with the motoseal grey. I've used it in gearcases before and it seems to stand up perfectly. But then again I usually use the same brand of gear oil.

 

[Wizard1]

Re: Spaghetti seal

Your right, I just started a new topic for that question.<br />Thanks

 

[byacey]

Re: Spaghetti seal

I bolted it up to the motor leg last night, outside. it' was about -25C and getting colder, so we'll see how it stands up to cold, expansion and contraction. if there's no drips by next spring it should be good to go. <br /><br />I made a new brass link for the shift rods from cutting a long one down to size from a longshaft model. The threads on the original one were pretty rough. I tapped the holes for 1/4" fine and bought two allen head stainless cap screws. Now I have to carry an allen wrench around in the tool box, but they are a lot easier to insert and remove than a hex head cap screw.