Throttle shaft slop...again!

[rochelle howell]

Just got the fuel spitting issue resolved on a 1977 Evinrude 115 . Found reversed Reed block to manifold gaskets from previous owner. Remedied that issue, wouldn't hesitate to use boat now as fuel has stopped spitting from carb. However all is not as nice as I would like.
Have a little throttle shaft slop which I can get a change in idle when I wrap a moist paper towel over end of butterfly shaft. Slop is actually visible to naked eye when the shaft is wiggled.
Not interested in (unless I really have to) in replacing with another 40 year old part from donor carb, even though I have parts 1000 miles away ( Bummer! )
Anybody have some insight where I could find some new throttle shaft bushings for this engine? I have had no luck finding a part number.

[phillnjack]

Try a model shop. They have ultra thin metal if you can simply cut it down and slide in. They might even have some bushings. Most model shops for like remote control or model trains is worth a try.

[rochelle howell]

Did omc ever offer throttle shaft bushings? With as many of these old motors that are around, figured somebody would have manufactured some.
I imagine that I am not the only one who could use a few sets.

[rochelle howell]

Seems worse on throttle lever side. Why are my darn pics turned ?Attachment 375427Attachment 375428Attachment 375429Attachment 375430

[rochelle howell]

Wow screwed something up! Attachment instead of pics? Guess I'll try again.

[phillnjack]

can you get the old bushing out ? or failing that, why not make a small bushing your self from either brass or a strong plastic.
then once you have the size you need internal, put a bolt throught it and use a lather or a drill with bolt tighten in the chuck and use sandpaper to get
it down to size externally.

then drill the original bushing on the carb to accept your new bushing, it only needs to go in about 1/8th inch .
make it a nice tight fit and tap it in.

are you sure its the bushing won and not the actual shafts that are worn ?

if you make the bushings yourself you can make a few incase they also wear out while you own the motor.

just a thought

[rochelle howell]

Haven't removed throttle shafts yet. Figured the softer brass or bronze bushing would be the likely culprit.

[BarryStrawn]

When you replace the bushings in a carburetor you normally ream them after installation to finish them to size and exact alignment. You can't just push in a new set. If you don't want to find a less worn set of carbs, I suggest taking them to a carb shop. They will have the reamer and the bushings. If you want to do it yourself, disassemble and measure them. Then google or ebay or just a decent auto part store. I would expect to pay about $100 for the reamer.

[mn808gade]

why try to reinvent the wheel??replace w/newer carbs that have primer and motor will start quicker and run better when trimed up-th

[rochelle howell]

I saw the kits with reamer, and yes, a little pricey. Got 2 parts motors (1984 115's) with primer solenoids and later carbs. 1000 miles away! Guess I"ll be searching for a parts motor, just haven't got a lot of space for crap! Already pushin' it! Another junk collection? Can't seem to get away from it! There's worse things to do I suppose.
Motor has noticeable sneeze at idle, wondering how bad it will be on motor to use a few times ( no sustained high speed runs, just puttin' around on the lake )until I find something. 93 octane only just to be on the safe side. Motor cranks at @125 psi. Thank you guys for replies, it's nice to be able to bounce ideas around, and I appreciate your time!

[mn808gade]

kits??-th

[rochelle howell]

Yes, kits with reamer. For automotive quadrajet. Like this.

[rjdubiel]

I saw the kits with reamer, and yes, a little pricey. Got 2 parts motors (1984 115's) with primer solenoids and later carbs. 1000 miles away! Guess I"ll be searching for a parts motor, just haven't got a lot of space for crap! Already pushin' it! Another junk collection? Can't seem to get away from it! There's worse things to do I suppose.
Motor has noticeable sneeze at idle, wondering how bad it will be on motor to use a few times ( no sustained high speed runs, just puttin' around on the lake )until I find something. 93 octane only just to be on the safe side. Motor cranks at @125 psi. Thank you guys for replies, it's nice to be able to bounce ideas around, and I appreciate your time!

I have some carbs with the same issue, I am thinking it will be an issue when at idle but not much at speed.?.?.?.? when the throttle is closed causing air to be sucked in through the gap in the throttle shaft, but at speed, the butterflys are open and I am thinking more air will choose the easier way in which would be the front of the carb, not the gap between the carb body and the throttle shaft. I may be way off but maybe somewhat right.

[rochelle howell]

Was thinking along those lines, also. Need to get on the water now. Weather is perfect! Thanks.

[rjdubiel]

I have seen people put very small o-rings on the outside of the carb where there is air getting in by the bushing and the throttle plate shafts. Maybe some of these between the outside carb body with a little ziptie or something to hold them tight to the carb may be a fix but not ideal.