Ugh more problems 75 chrysler 55 hp

[Tmacular]

Ok so boat has been running great since the last overhaul. However Saturday I noticed the boat would not throttle all the way up. The throttle cable was stiffening up at about 50-60%. So I let it be and fished on (was on a no-wake lake). Today I went to go out and troll around again, and when I got the motor started (took a min this time) it was revving really high without the carb throttle plate even being touched. Little kicks while it revved high and then my throttle cable locked up at WOT. So my question is what caused the boat to not throttle all the way up and why did it idle so high today after running great all day the day before? If its a cable issue where would I start my search for some new/used cables. Recently we did make a small adjustment to the shift coupler, dunno if that could of caused the problem but it wouldnt explain the extremely high idle?

I am going to clean out the carb tomorrow and take off the gearbox case to see what happened inside. Any other ideas are great especially where to locate some cables. If anyone has any they would be willing to part with PM me.

Thanks again fellas!

 

[jerryjerry05]

Re: Ugh more problems 75 chrysler 55 hp

Sounds like you were on the right track.
The cables or shifter need some attention.
Unhook them at the motor.Then try shifting.
Make sure the linkage is moving at the trigger/throttle.

 

[Tmacular]

Re: Ugh more problems 75 chrysler 55 hp

Jerry,

So would it be safe to say that the linkage coupler would not affect its forward speed at all? As long as its shifting in all gears the coupler is good I presume? I am still hunting for some cables, or a junk motor for parts that have cables with it. We will see what happens when I take it apart, Thanks!

 

[wickware]

Re: Ugh more problems 75 chrysler 55 hp

Tmacular, If your 1975 55 has one carb and is related to my 1970 35 HP, I can see possibly some wear, lack of lube vs a true cable issue and the linkage making a slight change vs WOT. I feel the WOT problem should be very noticeable.

1. My ref to linkage is my control box will let me slightly rev/foward vs more so in reverse.
2. With years of wear I have notices the throttle plate on my carb and linkage roller are not aligned good.
3. I have disassembled and greased my control box?s mechanics good and there was no resistance.

If our engines are related and if I might have any pics that will help, please let me know.

Good Luck!!

 

[Tmacular]

Re: Ugh more problems 75 chrysler 55 hp

Wick,

Yes we have the same exact motor, mine is also a single carb and has the same control box and linkage. My issue is that before it locked up in the forward position it was running fine but under throttle would not go past the half way mark in gear. Kind of like how far u can go in neutral. Now the thing is locked up and I have yet to find out where the issue is. The coupler on the lower unit would not affect this would it? We did some playing with that recently. Anywho, still havent looked into whether the cable itself is shot, or if it is indeed a lube issue. Any pics would be fantastic though as I am mad not being able to head out.

To add one more thing, if its the cable itself shot, what years and hp's use the same cables as the ones you have posted?

 

[wickware]

Re: Ugh more problems 75 chrysler 55 hp

We need to try and narrowing down your possible area/areas by isolating/eliminating possible areas. I will suggest this order since you are having or had a Lower Unit problem.

1. Disconnect the lower unit at the shift rod?s cotter pen if you are getting into all gears good (to not lose this position at the coupler). Disconnect at the coupler if you feel or know it is not adjuster to get all gears good. Mark the coupler?s position on the leg to know a full Forward, Reverse and centered Neutral position. With the shift rod or coupler disconnected, you should be able to shift at the shift rod or coupler to see and feel your full range to get all e positions and if there is any resistance while rotating the propeller by hand. You should be able to tell if resistance is in the Control Box, Cable or motor connections by going through the fill ranges. Lets get past these #1 issues before jumping and there are other ways you might test these areas faster and better suited, IDEAS!!

The cable info is above my experience if its needed.

Please look in the thread at the link below to see my ref of disconnecting at the Shift Rod or Coupler.

http://forums.iboats.com/showthread.php?t=455679&highlight=wickware

 

[jerryjerry05]

Re: Ugh more problems 75 chrysler 55 hp

The cables are universal Morse or Teleflex 3300 or 33c They come Morse/red Teleflex/black.
Some place,engraved on the cable is the length.It could be in inches or feet.

Unhook the cable connectors at the motor.Then try to shift the shifter.
If the shifter gives ANY resistance then unhook the cables at the shifter and try again.
While the lower unit is unhooked try to shift it by hand(motor off),turning the prop all the while.
Making sure the lower unit shifts in and out easily.
NEVER use OLD cables.The can be had all over for under $25.
I have to replace all 4 of mine,I just bought all 4 for $112 including shipping.
My cables are over 20ft.I doubt yours come that close.
Only 2 were real bad.Just replacing the other 2 because they are 24yrs old.
If they are stiff they CAN"T be lubed.You can try but you'll be working on them again SOON>

 

[Tmacular]

Re: Ugh more problems 75 chrysler 55 hp

Wick,

The gears are going into forward reverse and neutral ok. I tested by hand spinning the prop while a friend was moving the gear cable. That cable is fine (although really old). Took apart the control box and found that the throttle cable snapped off from the threaded ends and part of the threading is stuck within the plastic housing that is cotter pinned on. I tried to punch it out but not gonna happen. I am going to just replace both cables as mine are also very old and I am assuming they are original. to the 75 motor. Thanks for the help, after the new cables get put on I will make sure everything is shifting smooth and throttling ok on the motor. Doesnt seem as if there is any resistance.

Jerry,

OK excellent I could not find any markings on my cables so I wasnt sure which ones to order. Can I ask what site you found them at for that kind of deal? You are also correct that I need no where near that lengh . Just a 16 ft boat console near center o probably 10 ft on the high end. Do the cables come with the connecting ends where the cotter pin is or do I have to buy them separately? Mine are plastic and I would like to get something stronger such as metal if they make them.

Thanks again for the help gents! Hoping to be back on the water soon enough.

 

[wickware]

Re: Ugh more problems 75 chrysler 55 hp

Info:
1. My ends look factory fixed (at a price, LOL) and I am not relating to the plastic and cotter (different cable?).
2. The # on my cable 3300 CC17208 dictates an 8? length per the link below (I w/h guessed 7? w-loop included).
3. My console is closer to the rear in the 15? Raycraft Boat (different boats).

http://www.firstchoicemarine.com/p-16059-teleflex-3300-control-cable-8-cc17208.aspx

 

[Tmacular]

Re: Ugh more problems 75 chrysler 55 hp

Ordered these cables last night. http://www.pbsboatstore.com/teleflex-3300-universal-control-cable.htm

Just waiting for them to come in and it should be good to go. While I am waiting I think I am going to take the carb a apart and give it a nice cleaning. I also have never replaced just the cables before. Is there a certain way to put them on so that the guides are right for the motor and control box? And what are the connecting pieces called up front in the control box where the cable actually mounts to the controls? Need to get a pair of those as well.