1970 6hp seahorse, free spinning throttle.

[simplecat]

I aquired a 1970 6hp seahorse from a buddy of mine. said it ran last summer fine. the motor appears to be in excellent conditon. however I cant get it started at all.
The problem I think it has is the shift linkage. when i spin the throttle handle, it turns freely, has no resistance and creates no mechanical movement under the cover. maybe this could be the problem it wont start (because its stuck in gear). I will attach a few pictures hoping this will help someone diagnose my problem.
The long rod comming from the handle spins freely with the handle. however where the linkage goes up into the cover theres no movement at all.
Also there was a small pin taped to the handle. I also attached a picture of that as well. the second picture is where all movement from the handle stops. I dont know very much about outboards but in the third picture, I'd think that that should move as well and it dosnt. Hope someone can help me out. all ideas are appreciated. All i want to do is get this bad boy on the river! thanks everyone

 

[Sea18Horse]

Re: 1970 6hp seahorse, free spinning throttle.

I don't mean to be disrespectfull, but what was wrong with the information you were given the last two times you asked these same questions?

19th of July

and

20th of July

??????

 

[Vic.S]

Re: 1970 6hp seahorse, free spinning throttle.

Third time you have posted on this!

You seem to be confused between the gear shift, which is on the other side of the engine (your left as you look at it) and the throttle control which is what the twist grip is.

It was suggested to you before that the pins were a spare propeller drive pin and cotter pin. Yes? No? you did not reply again!

There appears to be a pinion missing from the end of the shaft where you are pointing in the second picture which should mesh with a gear below. Linkages should then connect to the magneto armature plate. The throttle valve in the carb is then operated by a cam as the armature plate is moved.

All the relevant bits and pieces can be seen in the parts diagrams on the BRP website
Look at the Magneto group to see the throttle linkages and the cam associated with the armature plate.
Look at the lower unit group to see the parts associated with the twist grip and the tiller.

If something is simply disconnected it should be obvious but any missing components should be identifiable in the parts diagrams.

 

[simplecat]

Re: 1970 6hp seahorse, free spinning throttle.

because the only information i was given was an exploded diagram of the outboard which did me no good. how could that help me solve my problem when im not sure if the handle should spin like that, or if there should be any movment when i spin the handle. thats why i attached pictures this time, hopefully to get an idea of whats wrong and not just a diagram.

 

[Vic.S]

Re: 1970 6hp seahorse, free spinning throttle.

OK then, no of course it should not spin without doing anything. What would be the point

Sorry about only pointing you to diagrams. Bring me the engine and I will show you what I mean.
( I am in Kent SE England UK not far off the M25 motorway and expect to be at home all weekend)

 

[Vic.S]

Re: 1970 6hp seahorse, free spinning throttle.

Sorry missed the third picture. The bit you are pointing at should turn as you turn the twist grip. the linkages to the armature plate are on the top of it.


I reckon it is the pinion missing i mentioned earlier, #69, #70 and #71 on the lower unit group diagram.

(If not missing then the gears are damaged)

 

[simplecat]

Re: 1970 6hp seahorse, free spinning throttle.

ha i see your a funny guy vic s. i found your post very helpful, now i see that it is in fact a simple pinion that im missing. could this be why it wont start? would you happen to know the positions of the gear select for the gears?

the prior post was for seah18horse by the way. he asked me why i keep posting when ive been given the information. I wouldnt post about this problem if i had an idea of what i was doing.

thanks

 

[CATransplant]

Re: 1970 6hp seahorse, free spinning throttle.

That missing gear is pretty obvious there, and it shows up nicely in the exploded parts diagram. In order for there to be movement of the timing and throttle linkage inside, two gears have to mesh. You have just one of them.

Get the parts and install them, and your free-spinning days will be over.

The pin and cotter pin are, indeed, the shear pin for the propellor and the cotter key for its nut. You may need them someday when you hit a rock on the river, so tape them back on the tiller handle.

The shifter is on the other side of the engine, so I'm not quike sure what you mean by shifting.

You may want to invest in the service manual for your engine. It will tell you how to disassemble and repair the tiller handle, step by step.

 

[CATransplant]

Re: 1970 6hp seahorse, free spinning throttle.

ha i see your a funny guy vic s. i found your post very helpful, now i see that it is in fact a simple pinion that im missing. could this be why it wont start? would you happen to know the positions of the gear select for the gears?

the prior post was for seah18horse by the way. he asked me why i keep posting when ive been given the information. I wouldnt post about this problem if i had an idea of what i was doing.

thanks

Yes, that is why it won't start. Your outboard needs to have the timing advance and throttle at the Start position, which cannot happen, since you don't have a part for the tiller handle.

We're trying to help you here. If you have little experience with tools and engines, you will most certainly need the manual. It is available here on iboats.com. Just click the manuals link at the top of this page.

As an alternative, you might consider just schlepping the whole thing down to your nearest Evinrude dealer and pay the nice people there to replace your pinion. For a bit more money, they'll replace the water pump impeller, which certainly needs to be done, the spark plugs, and clean the carburetor, if that's needed. All of that should come to about $400...roughly the value of the outboard.

Or, you can spend 1/10 of that, buy the manual, and do it yourself. In the process, you'll learn a bit about the mechanics of an outboard motor.

 

[Vic.S]

Re: 1970 6hp seahorse, free spinning throttle.

I wont guarantee that's the reason it wont start but it does mean you are not opening the throttle to the starting position. It will need the choke knob to be fully pulled out as well.

That bit in the third picture by the way is shown, #39, on the Powerhead diagram. I think F_R mentioned the pin at the bottom of it #40 in reply to one of your earlier posts.

The gear lever I expect should be pointing straight up for neutral.(Mine is) In neutral you will be able to spin the prop freely but if in gear it will only turn a part turn. But don't force the gear lever without the engine running or you will damage the selector mechanism. Operate it it gently while turning the prop if you must!

See the topic in the Engine FAQs board (First item in the repair and maintenance index)on "Outboard wont start" if it wont!

 

[simplecat]

Re: 1970 6hp seahorse, free spinning throttle.

yeah i definetly plan on doing it myself. i have called my local dealer and have got the parts ordered. however i will have to call them back and order the impellar. that would be a good idea before i get my hopes up and fire it up after i install the pinion.
thanks for all the information. im stoked to finally get it figured out. appreciate all the help. and I will keep you posted on how it comes.

 

[Vic.S]

Re: 1970 6hp seahorse, free spinning throttle.

To replace the pump impeller you will need to drop the entire gearcase from the leg. That will entail separating the two parts of the shift rod (not sure how you access the join on that model)

While the gearcase is off it is the time to think about seals if there is any sign of water in the oil.

A manual will be very, very advisable.

And so it goes on! Who would own an outboard engine.

 

[jay_merrill]

Re: 1970 6hp seahorse, free spinning throttle.

You are missing the Throttle Control Pinion (part # 303142), the Pinion Screw (part # 303951) and the Throttle Pinion Washer (part # 303107).

To fix this, fold the throttle handle up, pull the Short Gear & Shaft (Part # 376689) forward until the rear portion of the shaft (the end that you took a pic of) pulls up into the Steering Bracket (Part # 380184) housing. Now twist the Throttle Control Gear (Part #308187) to the "closed throttle" position.

Insert the Throttle Control Pinion into the space where the empty end of the Short Gear & Shaft was located, with the gears facing in an aft position. Rotate the Throttle Control Pinion until the first tooth lines up with the first slot in the Throttle Control Gear. Now notice that the Throttle Control Pinion has a flat side in the hole that the Short Shaft & Gear is inserted into. There is a corresponding flat side on the empty end of the Short Shaft & Gear - twist the shaft until the two flat sides line up and push the Short Shaft & Gear backwards until the tip inserts into the Throttle Control Pinion. Don't forget to imstall the Throttle Pinion Washer, as you do this. Insert and lightly tighten the Pinion Screw.

The next step is to make sure that the gear end of the Short Shaft & Gear line up with the gear end of the Long Shaft & Gear (Part # 377943), which is located inside of the handle that you raised previously. You will know whether or not they line up as you lower the handle because there is an open slot on one gear and what looks like an extra wide tooth on the other - the two should fit together almost like a handshake.

This process usually takes a little bit of fooling around to get everything lined up properly. If everything seems to line up, twist the throttle grip through its full range to make sure all of the linkage to the armature plate moves through its full range, as it should. If things are not lining up properly, you may have to "undo" everything to adjust the relationship between the Throttle Control Pinion and the Throttle Control Gear. If, however, all seems to be well, go back and fully tighten the Pinion Screw.

You can find a parts explosion, with part number listing here:

http://shop2.evinrude.com/ext/index.aspx?s1=3caf061dc768d848f4bbe2ada0179fa4


Disclaimer: I wrote all of this from memory. If you have a service manual for the motor, you should consult it. If you don't have a manual, you should buy one.

 

[simplecat]

Re: 1970 6hp seahorse, free spinning throttle.

okay, I got the new pinion in and the motor started right up. however it wont run with the choke off, and it seems to be a little to smokey. could this mean cleaning the carbuerator?

 

[Vic.S]

Re: 1970 6hp seahorse, free spinning throttle.

If it wont run without choke but will if you fiddle about with a bit of choke its a pretty sure sign that the carb needs cleaning.

However its worth twiddling the idle mixture adjustment screw first. It would be silly to pull it to bits if it only needs adjusting!

It's bound to be smokey. Two strokes are. That should clear when you are able to give it a good fast run.

 

[simplecat]

Re: 1970 6hp seahorse, free spinning throttle.

arite i will try fiddling with the screw first, however i have to get a pull start pinion because it broke after about 3 starts. no biggy though. thanks and i will keep you updated.