Near the throttle body there is two nuts on both cables one is your throttle and the other is your return cable check to see if the return cable is in its cable seat if it is not you will have to reseat it but if both cables are seated correctly you will have to losen both lock nuts on both cables once you have done this twist your throttle to the idel position and hold there tighten both cables and lock nuts and this should fix your problem
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Hi George. Brad may be right with his answer but there might be something you can do.
Does the throttle open/turn as it should or is it stuck in the closed position and will not turn at all?
If it won't move then it could be a seized cable, a stuck mechanism at the carb end or a twisted or kinked cable.
If it does move but the engine doesn't rev it could be a broken or disconnected cable.
On top of the carb there is a mechanism where the cable end fits and this is pulled to rev the engine. Have a look and see if there is a cable attached. There may be 2 on yours, one to open the throttle, the other to close it and snap the throttle closed which is aided by a spring. When you open the throttle does this move? Yes, then the cable is doing its job. No, then the cable is not operating properly and is either broken or has come away at the throttle end and will need looking at. With the engine idling try to move the mechanism manually and see if the revs increase and then drop off when you release it (you might need a screwdriver to reach in to do this). If it revs and drops back down as it should, then the mechanism is operating as it should, If it doesn't alter the engine speed despite moving back and forth then it has detached itself in the carb and that will require investigation. At least if the cause is found it could be an easy fix, or cut the mechanics costs by pointing him in the direction of the fault.
Throttle cable: remove the 3 screws on the right side of the carb, take off the cover, there is small rubber gasket (red) Don't lose it. you'll see the cable attached inside. move the mechanism forward like you're opening the throttle to get enough slack to unhook the cable.
Choke: on the other side of the carb, the choke cable screws in with a plastic nut (10 mm i think) unscrew with your hand, if its tight use pliers or wrench..its easy to unscrew it.
find the bottom carb , see where the linkage from the remote cable moves the lever on the side of the engine then disconnect the cable from the remotes ! on the bottom carb there should be a screw to adjust the tickover where the linkage meets the carb linkage , turn it in 2 turns then with water attatched to water intake on gearbox turned on start the engine , it mite be slightly high or low pending ! set at 900rpm , rev engine several times back to tickover and if ok then refit throttle cable , cable should be pushing lever against its stop and then when you select forward gear it shouldnt move till you throttle up ! when in water start engine and select forward gear and tickover should be 7 to 800rpm and idle ok if not adjust till ok !
You pinched or routed the throttle cable wrong when you put it together. Take the tank back off and check it. Make sure you can hear the throttle plates closing when you release the throttle before you reassemble it.
Your clutch cable is binding. When you release the clutch the it cable hangs up just enough to make the engine rev before it allows the clutch to fully engage. To check this , unhook both ends of the cable. You should be able to slide the cable with zero resistance. If the cable is binding at all replace it with a new one.
Its not too bad to adjust, just takes patience and an assistant would be nice. You want to center the linkage in neutral so the throttle does not move immediately when you shift.
This can be adjusted with the motor off. You need to try it first by putting the Handshift in neutral and spinning the prop by hand. The prop should spin without locking into gear or making a "ticking noise" with the gears partially meshing. If there is a "ticking noise" you need to disconnect the shift cable; adjust it until the noise is gone. Then reattach it.
Now have your assistant move the Hand Throttle slightly forward, the gears should make a "ticking sound" before the throttle cable moves, and the gears should lock into forward before the throttle cable moves. If the Throttle cable moves too soon, you want to disconnect the Throttle cable and turn the knurled fitting to return the Throttle cable to a closed position. Easy does it with these adjustments.
If you go too far while adjusting the Forward gear it can show up on Reverse. But remember, you do not need much Throttle in the Reverse gear. Reverse is only for manuvering at slow speeds. You want low RPM for Trolling in Forward so you want a little slack in the Throttle in Forward gear.
The gear change control cable has stretched and needs adjusting.Remove the engine cowling and with the motor NOT running,get someone to work the hand throttle/gear lever.Whilst they are doing this,you watch what happens at the engine.2 cables.One is for throttle and the other for gear change.Look at the direction the gear cables move when changing from fwd to rev.The next step is to run the motor and use the lever.Like you are flushing the engine.BUT!!!!!Be up in the boat.The prop will be in drive and can cut your legs off.Have all people well clear.With your helper using the gear change,get them to put the engine in reverse while you watch the cables.As it starts to grind you should manually help the cable by pushing the lever on the side of the motor with your hand.It should drop into gear cleanly.Do this a few times so you get familiar with the movements.A close look and you will see how to adjust the cable just where it is bolted to the side of the engine.It will have a plate or clip to undo and you then spin the locater along the threaded part of the cable.Hope this helps
there are two sets of cables coming from your control box. Onne of the cables switches you from foward/neutral/reverse, and the other cable is for the throttle. either you've have some linkage come loose on your throttle cable, of the cable has broken inside the plastic tube it's housed in.