johnson td 20 46-49 5 hp how to remove prop shaft?

[nick4203]

been sittin for who knows how long

got it goin checking bottom end now

need to figure out how to remove the prop shaft i think its called?

there is a little cam lobe for the water impeller do i need a pully puller type of deal to remove it or does it not come off?

allready have gathered a ton of info from here and other sites but couldnt find any thing on removal

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

also what kind of oil do i use in the bottom unit wont 80 - 90 wt gear oil drizzle out as im trying

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

Bump! any one with any information just need some clarification on a few things it would be greatly appreciated

oil for lower unit? 80-90wt gear oil?

2 cycle oil mix 16 to 1?

how to remove lower prop shaft and cam lobe for impeller? pulley puller?

 

[Chinewalker]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

Remove the rear pump cover. Clamp propshaft in a vice using wooden pads. GENTLY tap the gear housing with a rubber mallet, away from propshaft and the shaft should pull the pump housing out with it.

Unit does not use oil. Use Lubriplate 105 grease...

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

http://www.lubriplate.com/products/greases/no-105-motor-assembly-grease.html

is this the stuff where can i purchase locally? napa or a boat parts store mabe? and how much do i need? anything equivalent?

lower unit im kinda confused rear pump cover i will post a few pics in a moment my camera needs to charge for a moment there is a cam lobe on the prop shaft when i look it up looks like there is a pin inside the lobe but am unsure as if it pulls off the shaft or not

and i keep hearing parts for these old motors are available at napa is this true can they look them up by make and model of my motor?

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

see the lobe that needs to be removed how does that come off i can see some screws under the thin metal plate

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

here is a pic of the inside of the cam lobe it has some pins in there and i dont want to mess them up

 

[Chinewalker]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

The cam lobe ought to come right off. Might need some gently back and forth motion to line things up, but there is only one pin in the propshaft to drive it.

Once cam is off, remove the stainless pump plate. I can't recall offhand if there are screws holding the gear bearing in place or not, but if there are, they'll need to come out. Now that I think of it, I think there are three slotted screws holding the cover in place. Once they're out, you may be able to simply pull the rear cover off. If not, do as I said above and put the propshaft in a wood-blocked vice and tap the housing away from the propshaft. The shaft should pull the cover off with it.

Not many NAPA parts available for the TD-series. Next series up (the TN) started using the Universal Magneto and uses a rubber vane waterpump that is similar to (and easily made from) later style, so parts availability starts getting better from there forward.

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

"The cam lobe ought to come right off. Might need some gently back and forth motion to line things up, but there is only one pin in the propshaft to drive it."

Pulley puller? I tried pulling it and prying it i figured its pressed on? Am i correct and need a puller to pull it off?

will i damage the pin with a puller if its not lined up properly?

it has no play at all its on there good most likley pressed id

THANKS Chinewalker for the help here and am greatly appreciating the info i'm gunna order a new impeller today off ebay

http://www.ebay.com/itm/Johnson-Out...ssories_Gear&hash=item2a1d6e026b&vxp=mtr#shId

 

[Chinewalker]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

I don't remember them being on there that tightly, but it's been a long time since I've had one of those apart so the memory is fuzzy. If yours is stubborn you might be able to loosen it up with two sets of Vice-Grips - one set on the propshaft, the other on the cam - use thick rags or those rubber boots for the pliers to prevent marring the surfaces. You should be able to twist the cam to align the pin with the slot. Sliding a toothpick in the slot will tell you if the pin is lined up. Once lined up, use two wide blade screwdrivers to pry it loose.

Just out of curiosity, why are you getting into the gearcase itself? Is there excessive gear lash play? While holding the driveshaft steady, the propshaft should rock back and forth a few thousandths of an inch as the gear teeth click together - just barely. You don't want them mashed together tightly, but you don't want the propshaft turning several degrees before the teeth meet, either... just a hint of play is all that is necessary.

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

At first just to get in there.

Now i want to take the plate off right below it to straighten it out i may have put a couple little indention's in it messing with the little cam lob

i was reading any scoring in the housing and bends in that plate = no water pumping

it was trying to pump before i took it all apart a few spurts here and there but not a consistent stream more like sputtering put it back together and nothing the impeller is really hard and has some wear and tear on it

is there any tips on how to get the water flowing if a new impeller doesnt work?

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

got water pump impeller yesterday installed it used some gasket sealer on pump housing running and pumping pretty pro! even at very low idle

now i want to double check a few things for some reassurance

1. fuel mixture im running 16 to 1 is this correct?

2. carb adjustment

A. high speed needle the one going thru the tank 1 1/2 - 2 turns out?
B. low speed needle the L shaped one 1 1/2 turns out?

 

[HighTrim]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

Id have to have a look for the TD, but fairly certain it is 3/4 turn out for both, like the TN series.

16:1 is correct

 

[seahorse5]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

got water pump impeller yesterday installed it used some gasket sealer on pump housing running and pumping pretty pro! even at very low idle

now i want to double check a few things for some reassurance

1. fuel mixture im running 16 to 1 is this correct?

2. carb adjustment

A. high speed needle the one going thru the tank 1 1/2 - 2 turns out?
B. low speed needle the L shaped one 1 1/2 turns out?

16:1 is correct - 1/2 pint per gallon

high speed needle - 1 1/2 turns

low speed - 1/2 to 5/8 turns, may be more if crankshaft and bushings are worn excessively

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

http://www.youtube.com/watch?v=S6CPlPUXLaE&feature=relmfu

then this one

http://www.youtube.com/watch?v=3vu9gjE7sSw&feature=plcp

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

oops double post

 

[HighTrim]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

Seems pretty good. With adjusting you can get them to idle down quite nice if comrpession is good.

What are the needles set at?

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

i can idle at the lowest setting right before the lever hits the stop section but the recoil makes a noise because the springs i made for the lil arms are a bit to buff

low speed needle is about 3/4 for idle and then high speed is about 1 1/2 to 2 and kinda vary's i notice when its wide open i need to open up the low speed idel screw a tad almost to a full turn open

i have a few concerns now

1: i notice some grease coming out above the lower unit under the mounting bracket right where there is a half round plate the motor rest on and is the adjustment to trim the motor up and down with a wing nut i have slight grease leak or something goin on there

(on top of lower unit between it and the main shaft) is there some kind of seal that i may need to change?

2: and also right there it has 2 small holes witch spit some water and exhaust out is this normal looks to be but thought id ask and ill get som pics up soon

thanks for all the help!

 

[nick4203]

Re: johnson td 20 46-49 5 hp how to remove prop shaft?

How do i edit the title i want to just make it Johnson TD 20 Q's and just stick to this thread rather than starting more?