1958 sportwin bearing seal?

[kawk]

hi, i have an incredible amt of black oil all over armeture plate. i dont think i over greased. oil has a faint hint of gasoline smell. compresion 65 (cold) in both cylinders. is this a bearing seal failure? what should i use to clean up the electronics? thanks

 

[Joe Reeves]

Re: 1958 sportwin bearing seal?

Kawk..... A 1958 what? My memory doesn't recall what a sportwin hp is. I think a 10hp. If so, there would be a seal at that area that apparently is faulty.

 

[kawk]

Re: 1958 sportwin bearing seal?

hi joe, yes the 58 sportwin is a 10 hp. in a prior thread ( i think it was you ),said ,that if the seal was bad the grease would be clear. my grease is black. i think it has the scent of gas but my allergies may be clouding my sniffer

any idea how difficult it is to change that seal?

 

[F_R]

Re: 1958 sportwin bearing seal?

hi joe, yes the 58 sportwin is a 10 hp. in a prior thread ( i think it was you ),said ,that if the seal was bad the grease would be clear. my grease is black. i think it has the scent of gas but my allergies may be clouding my sniffer

any idea how difficult it is to change that seal?

If you have already been in there, you noticed a spring under the breaker cam. The spring holds the carbon seal down against the upper main bearing. An o-ring inside the carbon completes the seal. If it leaks, either the carbon is broken (it is fragile), or the o-ring is shot. OR, parts are missing or improperly installed.

Lucky for you it is an easy one to replace. Remove the breaker cam and flywheel key and lift the stuff out. Don't break the carbon.

 

[kawk]

Re: 1958 sportwin bearing seal?

FR, good call , it's the carbon seal. absolutley destroyed. any ideas on why that seal would break into so many pieces? to replace that seal $32. i have a spare powerhead with seal still intact. know any method to safley remove it? the seal slips over the crankshaft with to small holes on the inside. perhaps a dental pick.

 

[Joe Reeves]

Re: 1958 sportwin bearing seal?

It should simply lift out, held in place only by the O Ring friction against the crankshaft and the spring pressure holding it down.

My guess is that, at one time, it broke when hitting the top portion of the crankshaft to remove the flywheel. Best to pry up slightly on the flywheel when removing it with the puller/hammer.

 

[kawk]

Re: 1958 sportwin bearing seal?

Joe,
thanks for the replys. the carbon seal is recessed down into the roller bearing assembly. so its immposible to just lift out. just wondering if there was a special tool or technique to get a hold of it. there is an identical seal on the bottom of the shaft so i have 2 shots at this.
my spare powerhead has been sitting for a couple of years and i dont know if those are the orginal seals. that seal may have been on there 51 years. would some type of penetrating oil help my cause?

 

[Joe Reeves]

Re: 1958 sportwin bearing seal?

Notice the pictorial inserted by F_R. The top main bearing has a flat surface and the carbon seal should simply be sitting on top of it. The crankcase aluminum bearing flange may be higher than the main bearing (memory?), and if so, the carbon seal would simply be sitting inside of that... a snug fit but not extremely tight. Otherwise it would be necessary to split the block to change the carbon seal..... not logical from an engineers viewpoint.

 

[kawk]

Re: 1958 sportwin bearing seal?

Joe,
i would guess the 2 holes on the inside of the seal are there so that it can be lifted out. being the hacker that i am the only tool i could think of that would do the trick would be a dental pick.optimally 2 to work both holes at the same time. of course i dont have a dental pick.
back to an earlier question, what should i use to clean the oil off the electronics? thanks again.

 

[Joe Reeves]

Re: 1958 sportwin bearing seal?

Steel piano wires bent at right angles should do the trick.

Use caution obviously...... I first use WD40 and low volume compressed air to dispell the major portion, then either Lacquer Thinner or Acetone and again low volume compressed air to have it all squeaky clean.

Really best to have the armature plate removed BUT the cleaning can be done with it in place.

 

[Joe Reeves]

Re: 1958 sportwin bearing seal?

I checked my remaining stock to see if I might have those items in stock, but alas, no such luck. In my books, they're listed as:

O Ring - 301861 - $00.35 - NA as of 1987 (But someone probably has them yet)

Carbon Seal - 302036 - $18.29 as of 1999 - Vintage but apparently still available.

Piano wire..... any hobby shop or hardware store.

 

[kawk]

Re: 1958 sportwin bearing seal?

Joe,
my wife hates my boating obbsesion, shes gonna kill me when she sees that used piano on the front lawn.lol
thanks for everything ,i'll get to degreasing and hunting down a used piano.