1956 Fastwin 15 hp

[MisAdventure]

Hey all?.glad to be part of the forum.
Having issues with an old motor I just got. Ran great for several days?.spent one afternoon trolling around in reverse at low speeds, next day ran out into the middle of the lake?drifted for long time with motor off. Started it back up, no high end. Sounds and seems to run fine, but only about ? of the power?not sure what is wrong.
Thought spark plugs, changed them. Thought carb, have it off right now. ..what should I look for?
Where can I find a carb kit?looked online?seems motor is to old..
Any help would be great appreciated?thanks

 

[F_R]

Re: 1956 Fastwin 15 hp

Put the dang carburetor back on, if you haven't already taken it apart. If you have taken it apart, make sure it is clean and replace all the gaskets.

Then go to the real problem. Your motor is running on one cylinder. Since it is a 1956, there is a good chance the problem is cracked coils, unless they have already been replaced. If the coils are good, you probably have a problem with worn out or fouled breaker points. Either way, the flywheel has to come off to fix it.

BTW, the carburetor feeds BOTH cylinders. It cannot make it run on just one cylinder.

 

[MisAdventure]

Re: 1956 Fastwin 15 hp

Should have joined this forum first it would seem. I do have it apart. Gaskets need to be replaced, that is obvious even to me. Where can I find them?
Don?t know much about boat motors, where do I find the coils to see if they are cracked?
Thanks for the quick response

 

[bktheking]

Re: 1956 Fastwin 15 hp

Right hear on iboats, standard OMC coils, do the wires too while it's a apart and points/condensors if it need them. Proobably sell the carb kit as well here too but it might be OMC only in which case OMC dealer.

 

[jbjennings]

Re: 1956 Fastwin 15 hp

Should have joined this forum first it would seem. I do have it apart. Gaskets need to be replaced, that is obvious even to me. Where can I find them?
Don?t know much about boat motors, where do I find the coils to see if they are cracked?
Thanks for the quick response

The coils are under the flywheel. You'll need common but proper tools to do the job.
check this thread for instructons:
http://forums.iboats.com/showthread.php?t=294072

 

[MisAdventure]

Re: 1956 Fastwin 15 hp

thanks for the info...is there a way to get a look at the coils without taking the flywheel off?
I dont mind doing the work, prob try to get a look at it tomorrow....

with the above mentioned problem in my original post, are we sure this is the issue? what is a good indicator?

I only ask because I am new to working on motors... (dont have the cash to pay some one else, and want to learn how myself)

 

[OptsyEagle]

Re: 1956 Fastwin 15 hp

Do a spark test to be sure. With a spark tester your ignition should be able to jump a 3/8" gap. Most likely you will find that only one cylinder is firing. If so, time to look at the coils under the flywhelel. Make sure your points are set at 0.020" gap and are clean.

 

[jbjennings]

Re: 1956 Fastwin 15 hp

I can't remember how the recoil works on the '56, whether it is by single pawl or multiple pawls grabbing the center ring. Either way, if your flywheel has a little round, thin metal cover in the center, you can remove the 3 bolts holding it on and hopefully there will be a window through the flywheel where you can inspect the coils and set the points. If not, you hafta pull the flywheel. It's no biggie, you just need the correct grade 8 bolts and harmonic balancer puller from harbor freight or autozone. Your motor is probably the most perfect motor of all time to learn how to work on. I own the same motor, and love it.
BTW, yes, it sounds like you're hitting on one cylinder. F-R is right pretty much 101% of the time.

 

[MisAdventure]

Re: 1956 Fastwin 15 hp

thanks again. I will have to get a spark tester...
When you say points, what are you refering to?

Have been looking for the carb kit on iboats, cant find it. Not for the 56, am I just blind? If some one could post a link to one that would be awesome.

Glad this is a good motor for working on, excited to learn...

 

[F_R]

Re: 1956 Fastwin 15 hp

Breaker points---a glorified switch. Look at the picture I posted. You will see two cracked coils, two breaker points sets, and two condensers.

Carburetor kit is 18-7043. All that stuff is available here at iboats.

 

[MisAdventure]

Re: 1956 Fastwin 15 hp

okay, thanks. I am going to pick the tools up today. Harmonic balancer puller, spark tester, spark gaper, torque wrench, grade 8 bolts?.anything else I will need?

thanks for the numbers on the carb..

what are the numbers on the coils I need?

 

[F_R]

Re: 1956 Fastwin 15 hp

Something to hold the flywheel while you torque on the nut. People get pretty creative on that.

Coils are 18-5181. But don't go buying them till you look to see if you need them.

 

[MisAdventure]

Re: 1956 Fastwin 15 hp

Okay, between last post and this one: Made Coffee, Drank Coffee, Still Drinking Coffee?
Pulled fly wheal cover that houses pull start assembly
Small metal cover on fly wheel ? pulled it looked in, coils are black, clean, look new?everything inside looks really clean
Thinking coils are fine..
Next step? (check spark? How do I do that? Put everything back together?)

 

[lindy46]

Re: 1956 Fastwin 15 hp

As mentioned earlier, get a spark tester at any auto parts store - about $8. Remove spark plug wire from one of the plugs, plug the spark tester into the plug wire and set the gap at about 3/8". Ground the spark tester to the block using the alligator clip and spin the flywheel clockwise. You should get a snappy blue spark. Repeat for other spark plug wire.

 

[asdasc]

Re: 1956 Fastwin 15 hp

Note that when looking for the spark, you will need to spin it fairly fast. A simple tug of the starter rope with the plugs removed will do it.

I only say this because I was spinning it with my hand on top of the flywheel real slowly the first time I tried it, and 'nothing'. My dad explained to me that you need the magnets (in the flywheel) to spin by the coil pickups quickly to build up the charge that charges the capacitors (called condensors in motors for some reason) that gets released thru the spark gap of the spark plug when the switch (call points in a motor) closes.

Good luck and enjoy!

These motors are basically very simple and easy to figure out if you take the time to look at them long enough. There are MANY tricks and 'quirks', that make them much easier, so don't hesitate to ask on line here when you get stumped. Trust me, you will never be the first to see a problem with these older motors. The guys on here have seen most everything.

 

[F_R]

Re: 1956 Fastwin 15 hp

Cheap way: Stick a plastic handled phillips screwdriver in the spark plug boot. Hold about 1/4" away from head. Spin flywheel. Look for spark. Puny spark doesn't count, it needs to be able to jump a quarter inch.

 

[MisAdventure]

Re: 1956 Fastwin 15 hp

Okay, bottom plug is getting a spark about every 2nd or 3rd pull...(limited pull ability on stand)

top plug is getting no spark....

what next?

 

[JSGOLD]

Re: 1956 Fastwin 15 hp

Still sounds like the old coils....aren't new ones almost always green? Look at the points and turn the crank, check to see if points are opening and if they have any kind of pitting on the contacts.......

 

[JSGOLD]

Re: 1956 Fastwin 15 hp

this might help you on the coils......good luck

http://www.youtube.com/watch?v=KT8rk5QWgS0

 

[MisAdventure]

Re: 1956 Fastwin 15 hp

okay, put it all back together. Sprayed carb cleaner in carb just to be sure went back together clean. (did not get carb kit but still may for gaskets)

Will pull the cover off fly wheel, check to see if I can get at things through little window. If not Ill get the tools I need to remove flywheel...have to wait for tomorrow if I need to get tools.

thanks again for all the help...
any thing else I should be doing?