'56 Johnson Javelin Shift/Throttle problem

[82rude]

Re: '56 Johnson Javelin Shift/Throttle problem

yes i know, im sorry those examples above still are good for you .there was only 2 props made for all those motors and they are 10 3/8 x 11 1/2 p and 10 1/2 x12p.i typed in your numbers at michigan wheel and they say its a 9x9 prop with those numbers which it obviously isnt..also 2 blades.

 

[82rude]

Re: '56 Johnson Javelin Shift/Throttle problem

most likely kathy your prop will be the 10 1/2 x12 p the other is for slightly larger boats.see this high trim?by rights thats what she should need.

 

[KathyD19]

Re: '56 Johnson Javelin Shift/Throttle problem

I looked up how to find out your prop size and it said to measure from the middle point of the hub out to the tip of the blade then multiply by two. I measured 5 1/4 so you would be correct at the 10 1/2 #.

 

[82rude]

Re: '56 Johnson Javelin Shift/Throttle problem

I looked up how to find out your prop size and it said to measure from the middle point of the hub out to the tip of the blade then multiply by two. I measured 5 1/4 so you would be correct at the 10 1/2 #.

goood so now you know you have the 10 1/2 x 12 p prop.so now the options are endless really.fix,buy new or ebay or maybe a dealer might have a used one around keeping in mind the motors i told you about.i have several here but their proably too nicked up.be aware that the new ones are getting harder to find and are going up in price.95 bucks here at iboats .

 

[82rude]

Re: '56 Johnson Javelin Shift/Throttle problem

kathy dont know if youve been show this site or not so here it is http://www.old-omc.de/start.html once you nav it you will notice the original prop was 10 3/8 x 12 1/2 p.they are no longer made hence the 10 1/2 x 12p today.neat site.

 

[nwcove]

Re: '56 Johnson Javelin Shift/Throttle problem

NWcove that's a great idea! And yeah, I was surprised when both places said that no one around here repairs props, said it was kind of a "dying art". Of course I'm in land-locked central Illinois so there isn't a huge demand for boating here.

And now, I've made a Youtube account and posted my first videos ever so you all can see me "in action" :facepalm: My brother was video taping when the prop spun so you can hear it/watch it as if you were right there with me. Notice my tight/fake smile as I'm cussing in my head wondering what the *@&#)(%# I did now and how do I fix it to save face. I could only assume it had to do with the shift rod coming undone or something since that was the last issue I was working on. My poor mom looked so cold in the back! Awww! Here's the link, if you don't laugh at me too badly!! http://www.youtube.com/watch?v=FUn5lYySQiU (there are 3 one minute videos that he took uploaded there)

"do we have a problem?"...."yeah...we have a problem!".

 

[KathyD19]

Re: '56 Johnson Javelin Shift/Throttle problem


Ok, here's the latest (are you sick of me yet??) Thought I'd stop by the boat junk yard/marine repair place 20 miles from here and see if they had any old props that would work. The guy there found this white one, while I was admiring the assortment of boat parts and kinda fell in love with this cool UFO shaped stern light. He said it wasn't exact but he felt it was close enough that it would be fine, said at the most the variance in pitch might cause me to loose a little off the mph I was getting (was at 32 mph WOT) He said if it didn't work for me, just bring it back and it only cost $20, PLUS he threw in the UFO stern light for free!! I am adding pics of it here for you all to see; it is close and the thing looks practically new with only some of the original paint missing. I called the guy near St. Louis that does the re-hubbing and he said it would be $70 and that wasn't including his cost to ship it back to me. Wow. Add on my cost to ship it to him and his return shipping and I'm at the same price as a new prop. So I think I'll try this one that I bought today and see how she goes. For $20, how can I go wrong? Oh sheesh! I shouldn't tempt the fates!

One more thing: I have noticed this oily looking leak down the side of the leg several times now over the months. I wipe it off and it comes back but slowly so I put a pic of it up here too. I can't tell where the left side leak is coming from but the one on the right seems to come from some teeny tiny drain portal or something. Ugh...is this a new problem in the making?

 

[82rude]

Re: '56 Johnson Javelin Shift/Throttle problem

looks like maybe unburnt oil .worse case about the prop kathy is if you dont like the performance you can keep it as a good spare .

 

[kfa4303]

Re: '56 Johnson Javelin Shift/Throttle problem

Sweet deal on the new/old prop and free alien stern light! The prop looks like it should work nicely. Gotta love old timey boat guys. Just be sure to put the motor in NEU after you slip the new prop on and spin it a few times in either direction to be sure that it's not hitting anything. Next you'll want to take her for a spinng....in your hand y dandy trash can. Yeah, it's a pain, but a lot easier than taking the boat to the lake. You know the drill, fill the tank with water, fire up the motor and cycle through the gears at low idle. You'll know it when/if the new prop is working. If all seems well, then you can hit the lake. After you've launched, put her through her paces, while staying as close to land as you can. If all goes well, she'll hop right up on plane and you'll be vroom-vrooming with the best of them. As long as the motor is running well, I wouldn't worry about the oil for now. It's either a bit of unburnt fuel, or just good old grease and grime that's being shaken loose after sitting for so long. Good luck. Keep us posted.

 

[Willyclay]

Re: '56 Johnson Javelin Shift/Throttle problem

Wow, what a great looking 50 year old prop for only $20.00! Hope the hub withstands your "need for speed". LOL I agree with kfa4303 that the oil leakage may just be the result of use because everytime you tilt the motor after running, some fuel/oil mixture probably leaks out of the carb into the bottom of the cowling. Next time you have the cowling open/off look around with a good light for accumulation and see if it matches the exterior locations. You can handle whatever it is!

 

[Willyclay]

Re: '56 Johnson Javelin Shift/Throttle problem

Just saw some bad looking stuff on the NWS radar out your way. Hope you were not on the lake when that came through. Be safe!

 

[KathyD19]

Re: '56 Johnson Javelin Shift/Throttle problem

Thanks everyone. No, WillyClay, not out on the lake today....Lyme disease is rearing it's ugly head and I feel like crud today. Every part of me hurts. Haven't even gotten around to putting the new prop on but I'll probably only do a bucket test on it this season then it's off to winter storage-land. I was trying to put in a new steering cable yesterday and was having a heck of a time getting it to stay put on the drum as I ran around to the back to tighten up the tension on the springs. Gave up and am going to try today when I feel better...going to duct tape the dang cable to the drum this time before I head to the back of the boat!

By the way, I looked up that stern light online, found out it's called a "Jetsons light" (from the old tv cartoon) and also saw that one sold for $100 and another for $200 to people wanting them for ChrisCraft boats!! Dang, I got it for free! Too bad I love it so much or I'd flip that on ebay in a heartbeat!

 

[64osby]

Re: '56 Johnson Javelin Shift/Throttle problem

The Starcraft mob here also loves the Jetson lights, it's OEM and yes they will open the wallet to get one. They are pretty rare. Great shopping. Your making money.

Been watching for a while. Nice work on your Javelin.

I'm waiting for that Indian Summer weekend before putting the boats up for winter, hopefully.

 

[HighTrim]

Re: '56 Johnson Javelin Shift/Throttle problem

What you see there is unburnt fuel and oil mix along with spent cooling water. The fuel mixture never fully burns off, so the excess from the cylinder gets shot out with the exhaust. Now you gearcase has the little tiny weep holes at low spots to ensure that they drain completely, without them the water sitting in there will freeze in the winter, expand and crack your gearcase. Please don't plug those holes, as many a silly boater has done thinking they are leaking.

Up north right now winterizing boats, on my blackberry and hard to type with big fingers so this is thw end of my post!

 

[Willyclay]

Re: '56 Johnson Javelin Shift/Throttle problem

I was trying to put in a new steering cable yesterday and was having a heck of a time getting it to stay put on the drum as I ran around to the back to tighten up the tension on the springs. Gave up and am going to try today when I feel better...going to duct tape the dang cable to the drum this time before I head to the back of the boat!

Sorry to hear the LD knocked you back a bit today. Hope you can get going again soon. Here's a link to a thread in the FAQ's about installing the cable on a drum. Maybe it will help when you feel like tackling it again. Good luck!

http://forums.iboats.com/showthread.php?t=200994

 

[Willyclay]

Re: '56 Johnson Javelin Shift/Throttle problem

A thought fell out of the empty space between my ears that I wanted to share regarding your original prop with the spun hub. Us old guys tend to want to fix things ourselves rather than throw money at new parts or even professional repairs. That said, I believe there is a relatively inexpensive fix for your prop. It can be saved by pinning the prop body to the existing hub with set screws. If you use brass set screws, they will provide some shear properties. Anything stronger will require a softer drive pin like kfa4303 described to protect the propshaft, driveshaft and gears.

My suggestion is to drill and tap the prop in three equally-spaced locations around the prop to maintain dynamic balance. Depth is not a problem as long as your set screws do not penetrate into the propshaft hole. Install the brass screws with a little Loctite, grind the head of the screws flush with the prop housing and you are done. If you have access to a drill press, you can do this. If not, any outboard repair shop or machine shop should be capable for way less than a "re-hub job". Questions, comments, criticism?

 

[HighTrim]

Re: '56 Johnson Javelin Shift/Throttle problem

Not criticism Willy, but have more of a question, or discussion.

Im worried that the combined strenght of the 3 screws will be too great compared to the slipping properties of the rubber hub.

Installing brass shear pins in these Big Twins to compensate for this will cause constant replacement of the pin I fear due to the motors torque. (Have you seen how she drives! )

Again, not criticising, as Im not positive, but worry about potentially damaging the powerhead or gearset without proper protection.

Would also like to edit my last post as well, on my cell phone I could not really see the pics posted, now that I can see them on my desktop they are obviously not the gearcase that I was envisioning, but still unburnt fuel/oil mix none the less.

 

[HighTrim]

Re: '56 Johnson Javelin Shift/Throttle problem

Also forgot to post, the AMC 383 is a 10 3/8 x 11 1/2 aluminum 3 blade prop.

It was used on the earlier Big Twins and was used for 14-16 ft boats with 1 to 4 passengers.

 

[Willyclay]

Re: '56 Johnson Javelin Shift/Throttle problem

Not criticism Willy, but have more of a question, or discussion.

Im worried that the combined strenght of the 3 screws will be too great compared to the slipping properties of the rubber hub.

Installing brass shear pins in these Big Twins to compensate for this will cause constant replacement of the pin I fear due to the motors torque. (Have you seen how she drives! )

Again, not criticising, as Im not positive, but worry about potentially damaging the powerhead or gearset without proper protection.

HT, I do not disagree with anything you have said above. My reason for putting it on the table was to offer a low-cost method of saving the prop for future use as a backup/spare as Kathy suggested. I have only done this mod to one prop in my lifetime and it was many years ago when I had three young kids and no money for toys. My worst fear in making forum posts is creating a problem for another member.

The only specific data I have seen on the OEM slip-clutch hub design is that they should test between 150-210ft.-lbs. of torque to be considered useable. I have no clue how to relate that to the strength of three set-screws except to say I would recommend starting with the smallest diameter screws possible. Regarding the brass shear pin replacement for the SS OEM drive pin, I have seen other forum discussions of that idea in the Prop Forum and the concensus was brass was too soft and bronze was recommended instead.

 

[HighTrim]

Re: '56 Johnson Javelin Shift/Throttle problem

Yeah Im not saying that I have never done it to a spare for myself

Just like you, I try to be careful on what I reccomend for others to do on forums,