carb removal instructions?

[Gyp-sea]

hey guys...i have a 1962 johnson 40hp and i need to remove the carb to rebuild. anybody have instructions as to how i would do that? looks like i need to remove generator and starter first. generator is off, starter still on with one screw i can't reach. do i have to remove the flywheel?

 

[F_R]

Re: carb removal instructions?

You can fight it and cuss and yell, or you can just bite the bullet and make it easy on yourself. Remove the recoil starter, then the flywheel. Now it is easy to get the electric starter and generator off. NOW you can get the carburetor off.

 

[SparkieBoat]

Re: carb removal instructions?

I had a 60s model 40 HP sea horse that needed a carb rebuild...I tried to give the thing away and finally threw it in the dump, ridiculously stupid design and I saw no reason to subject myself to that kind of torture..

 

[Gyp-sea]

Re: carb removal instructions?

F_R: that's what i thought. to take the flywheel off, do i just remove the big nut on top? and, (insert stupid question here), does it turn off counter clockwise? wasn't sure if it was backwards to counter the spinning of the flywheel...

sparkieboat: sorry dude...not much help there. i'm NOT giving up that easily.

 

[F_R]

Re: carb removal instructions?

Well, yes. But let's don't over simplifly here. That nut is tight!!!. And yes, it is lefty loosey, righty tighty. You will need a suitable 3-bolt puller with Grade-8 bolts to get the flywheel off the tapered shaft. And it will be very hard to break free.

When you put it back on, the tapers on the shaft and flywheel MUST be clean and dry, and you absolutely MUST use a torque wrench to tighten the nut to 100-105 foot pounds. Ignoring this advice will destroy the motor. I tossed one in the trash just yesterday for that very reason (wasn't me that did it).

Ain't as easy as everybody thinks, huh? Hey, all it takes is proper knowledge and the proper tools and it is a piece of cake. I've done literally thousands of them.

 

[Gyp-sea]

Re: carb removal instructions?

got it outta there! didn't have to take the flywheel off after all...what a pig to work on though. i've never seen so much crammed into such a small area:redface:
thanks again f_r for the help!

 

[SparkieBoat]

Re: carb removal instructions?

have fun..the day will come when you will see the light young grass hopper....LOL, I really do wish you well and I am sure you will get it running again without too much trouble. Wish i could be more help to you but like I said I refuse to expose myself to that type of torture on purpose, so I have no idea how to work on them old motors, now if you ever dive into and 80s or newer carbed model I can probably be some help.

 

[Gyp-sea]

Re: carb removal instructions?

have fun..the day will come when you will see the light young grass hopper....LOL, I really do wish you well and I am sure you will get it running again without too much trouble. Wish i could be more help to you but like I said I refuse to expose myself to that type of torture on purpose, so I have no idea how to work on them old motors, now if you ever dive into and 80s or newer carbed model I can probably be some help.

now where's the fun in that? i don't want to rely on hooking it up a computer to have it tell me what the problem is...these newer motors don't have the same charm as the old boys. believe or not, i actually work on these things to relax. this little seahorse HAS tested my patience though. but hey, us canucks are wired a little different in the head then you southern boys.

 

[samo_ott]

Re: carb removal instructions?

I dunno. I have a shed of engines with several 40's in it and I don't like em. Big, heavy, hard to work on, hard to move around. I actually sold two off on Sat for $250 together. I was very happy to get rid of them and open up space in my shed I like the smaller engines better 20hp and less.

 

[F_R]

Re: carb removal instructions?

The 40 really isn't hard to work on. You just have to do it right. Shortcuts are what makes it difficult. Those motors were OMC's bread and butter of the 1960's

As for getting the carburetor off, it is really rare that you would want to do that without doing a complete tune-up---and that requires pulling the flywheel to get at the igniton system. So, what's to lose?

 

[SparkieBoat]

Re: carb removal instructions?

LOL Gypsea, you are correct..you canucks are defiantly wired differently for sure. I wish you all the best. I just try to make my life as simple and flowing as possible. I have enough difficulties so I try to choose things that have the least difficulty factors. Not that I am afraid of a challenge, just dont see any reason to make things unnecessarily hard on myself if possible. So I drive new model cars, (haven't had to call for a tow since I quit driving old cars, just get in turn the key and go...too easy) and I wish I could drive new boats but alas I spent all my money on cars and trucks, so I settle for motors that are reasonably dependable and fairly easy to maintain..one day soon I will only have new outboards also and I can quit searching repair forums to figure out whats wrong with my boat motor...I will really miss you guys....REALLY....

 

[royal0014]

Re: carb removal instructions?

Ok, I don't get it. I have a '66 Johnny 40hp electramatic, must remove starter and gen. to pull the carb., and can have it off in 15 minutes W/O pulling the flywheel! Of course, the motor does not have the recoil starter, maybe that's the difference??

But, as long as you have the carb off, make sure you pull out the core plugs (look like freeze plugs) and clean those passages well.

Good luck and happy boating!!