'72 1150 merc. no throttle response

[monk-monk]

ok gang, took it to the lake today for the first time, still had to use squirt bottle to start..once warm it will start right up. the problem is when i put it in gear and try to throttle-up...very little happens..i had to push the throttle all the way just to go 10 mph. funny thing...if i draw the idle lever all the way back and down i can then get more throttle and mph out of it but, it doesn't sound like it's firing properly when this is done

 

[AMD Rules]

Re: '72 1150 merc. no throttle response

...... funny thing...if i draw the idle lever all the way back and down i can then get more throttle and mph out of it but, it doesn't sound like it's firing properly when this is done

What exactly happens? Throttle forward, rpm increased but you dont move fast? Or no rpm increase at all?

If you 'pull it allthe way back & down" you should be in reverse. Are you sure you have the throttle cable and shift cables hooked up properly? Shift cable is the one that moves first when the throttle arm is moving forward. The throttle cable movement follows shortly afterwards.





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[monk-monk]

Re: '72 1150 merc. no throttle response

Hey AMD! I'm almost embarrassed to ask but I need to know, the lever that puts it in gear.. is this the throttle lever and the little lever next to it ..exactly what does it do? I can tell you this.. unless I pull the little lever back all the way, the throttle plates are not open, and when that lever is all the way back the throttle plates are still only open about a third of the way. The big gear shift lever when moved forward will not open the throttle plates at all.

 

[monk-monk]

Re: '72 1150 merc. no throttle response

The reason I ask about these levers is that my Seloc manual under "primary pick-up sync timing saya with the engine in "neutral" advance the throttle until the timing becomes 5 to 7 degrees BTDC...?? how can i have it in neutral and still advance the throttle if this is the gear shift lever, i have to go into gear to advance the throttle???

 

[Plainsman]

Re: '72 1150 merc. no throttle response

monk, have your read this?

http://forums.iboats.com/bbBoard.cgi?a=viewthread;fid=36;gtid=1114512

You have to disconnect the throttle cable and run it by hand.

 

[AMD Rules]

Re: '72 1150 merc. no throttle response

Before you start adjusting things, take a moment to figure out which "lever" is which.

If your questions about levers are those at the helm controls, you should have two levers. The larger one sticks straight up when the motor is in neutral. Pushing forward on it shifts the motor into gear, and -then- advances the throttle. Pulling back on it shift into reverse, and -then- advances the throttle.

The little lever next to the big one is normally not raised at all, and is used only to assist with starting the motor. It advances only the idle speed and does not shift into gear. Some controls don't have that lever at all, and have a button to disengage the shift mechanism instead. Either way, its a way to increase the rpm while attempting to start, leaving the gearbox in neutral.

Back at the motor, as Eric mentioned you need to disconnect the throttle cable before adjusting any of the timing/throttle settings.

Make sure you have the throttle cable hooked up properly... it is not uncommon for people to hook up the shift cable and the throttle cable bass-ackwards. The shift cable is the first to move when you move the throttle control lever at the helm.

The link 'n sync is not too hard, but can be confusing for the first time. Before adjusting anything, ask questions if you're in doubt.

 

[monk-monk]

Re: '72 1150 merc. no throttle response

That helps clear things up a little. We are talking about the same levers and their functions but, heres the situation...no matter how far i advance the throttle or "big lever" my throttle plates will not even begin to open...it's only when i pull the idle lever all the way back do i realize any movement in the throttlr plates. The cables must be connected properly for the "big lever" to put it in gear but, it won't open the throttle plates!!

 

[Plainsman]

Re: '72 1150 merc. no throttle response

So once started, do you put the high idle lever all the way down? You have to do this or you'll get high rpms and hardly any speed. (Don't ask how I know this :$)

 

[monk-monk]

Re: '72 1150 merc. no throttle response

What is the tang or trigger screw and where is it located??

 

[AMD Rules]

Re: '72 1150 merc. no throttle response

 

[monk-monk]

Re: '72 1150 merc. no throttle response

Thanks AMD!! Great pics. and a definite answer to my question. In the timing and sync info Eric sent me...Timing Event Two..It states "leave throttle cable disconnected and go to water..adjusting idle stop screw..then says have friend put it into gear...how can the friend put it into gear when the throttle cable is still disconnected because , the next to last paragragh states " now adjust and hook-up the throttle cable"? Is this Timing event two done while in gear to reach this 21 degree BTDC?? I apologize but, i'm still confused about this though, i am getting up to speed w/ whats going on here..

 

[Plainsman]

Re: '72 1150 merc. no throttle response

You are just disconnecting the throttle, not the shifting cable, so you will be able to put it into gear when you mve the lever forward.