1975 chrysler 55 hp serial # 557hg throttle wont advance to WOT

[jerryjerry05]

Oldboat1 moving the throttle to the other side?????
​Please explain? Pics
No way to move the throttle or towershaft?????

 

[kino986]

Iv tried everything and any way possible that would prevent this and iv gotten nowhere. I have tried moving the ball joint on the cam to face port side and that was a huge mess and moved it back to facing starboard side.
I don't understand and I am going to have a guy takept a loot at it who used to overhaul and service these chryslers motors. Iv done as much research as I can and iv gotten nowhere. No the metalk stop looks like a right angle part of the tower shaft and noway of moving it unless you cut off and I refuse to cut anything on a motor something just isn't right and I'll find out what that is somehow.

 

[oldboat1]

Oldboat1 moving the throttle to the other side?????
​Please explain? Pics
No way to move the throttle or towershaft?????

Hi jerryjerry. missed your post -- out fooling around with the boat.

just a simple point -- the post for the connector on the throttle cam is on the starboard side. Suggesting the fit might be better if the post was on the port side (facing the powerhead) -- as in the pic in #11 (wickware). It looks to me like the cam is configured that way for attaching the link. If there is currently some binding going on, simply moving the post might solve the problem. I'm assuming the setup shown in post 11 is correct, but can't confirm that -- but assume it works.

[edit. Like this one: http://www.ebay.com/itm/like/281909252911?lpid=82&chn=ps&ul_noapp=true ]

 

[oldboat1]

Iv tried everything and any way possible that would prevent this and iv gotten nowhere. I have tried moving the ball joint on the cam to face port side and that was a huge mess and moved it back to facing starboard side.
I don't understand and I am going to have a guy takept a loot at it who used to overhaul and service these chryslers motors. Iv done as much research as I can and iv gotten nowhere. No the metalk stop looks like a right angle part of the tower shaft and noway of moving it unless you cut off and I refuse to cut anything on a motor something just isn't right and I'll find out what that is somehow.

hmmm. Can't hook up the link the same as in #11? Not sure how moving the post/ball joint would create a mess. I would just take the nut off the post, and face the post toward the powerhead -- no need to detach the cam.

 

[Nordin]

I have followed this thread and did a comment some weeks ago, but it did not solved the issue.


I would suggest to do as following.

First check the timeadvance at WOT static. It should be 30dgr BTDC. If not correct, adjust by shorten or lengthen the timing rod.

Second check and set the throttle pick up point by adjusting the roller to the throttle cam. It should intersect the roller at the scribed line.

Third adjust the throttle butterfly to reach WOT (butterfly) horizontal by lengthen or shorten the throttle rod (turning/screwing the plastic ball joints).

If your not able to achieve the butterfly to horizontal position because the thread and length of the rod is not enough there is something wrong with the rod.
Wrong rod or some one have cut it.

 

[oldboat1]

think maybe all configurations were tried -- but based on the second pic in #1, looks to me like the ball/post needs to be up on the tower, and port-side on the cam. dunno....

 

[jerryjerry05]

Oldboat1 I suggested that before and he said he tried it.

 

[flyingscott]

I have a couple questions did the boat run right before all this. Is the motor new to you and what was the problem you were having. Have you done what nordin said about the link and sync and take the idle screw out completely. Take the screw out completely and take a pic with the throttle assembly fully retarded. You might be losing stroke because the throttle started out to far advanced in the first place.

 

[oldboat1]

Oldboat1 I suggested that before and he said he tried it.

Yeah, saw that -- but suggesting relocating both posts might be the correct assembly (up on the tower, and port side on the cam). Looking at the second pic in #1 (presumably at idle), the link would be about right if both posts were relocated. Not sure if simultaneously moving both posts was tried.

Doesn't mean the sync is correct, but looks like the rod would at least be aligned correctly for full travel (pending adjustment for length). If that second pic in #1 shows a fully retarded position (part of Flyingscott's suggestion), it looks to me like relocating the two posts and adjusting/attaching the rod would do it. If the idle stop is backed out, the rod would be adjusted accordingly -- but think travel of the rod would be straight and unimpeded with both posts relocated.

[guessing, of course....]