Beginner needs help finding a manual for Yam 55 BET

[cpostis]

Another small update: soldered it for testing purposes (we'll get a new one to be on the safe side, was just to see if it sparks) - got spark. In fact, the engine ran for a couple of seconds, it doesn't hold idle though. Bit of revs, it keeps running, but in idle, it dies shortly after.

Will do a complete service, checking fuel filter etc, and settings in general like idle screw (i'm assuming it has one), timing etc. But our money is on clogged fuel lines (mind, the engine stood for a long time) or something similar, because it didn't start from the get go - we had to "encourage" it with some carb clean in the cylinder. Once it fired up for the first time, we were able to start it every time via key.

And absolutely loving it.

Great!!!

Now that you have it able to run , you might want to do a compression test with warm motor to ensure the motor is sound internally before you go further? See page 3-14 to 3-16 under "Ins/Adj, Periodic Service" in the manual I sent.

Let me guess where you blokes are working on this engine/boat, Lancaster?

[m4inbrain]

Yeah, compression test is scheduled tomorrow. And no, not Lancaster. Cardiff area.

[m4inbrain]

Another, possibly rather dumb question. We don't have the manual for the Yamaha 703 throttle, and we've never installed a throttle cable, but ours seemed rather long and was pretty hard to operate. After detaching, with the wires straight, it was rather easy.

My question: what is the correct way to connect a throttle cable, or rather, how to "lay" it? It needs some play because obviously the engine is swinging left and right while steering - but it basically came out the grommet straight into the engine, with a pretty sharp bend a couple of inches from the engine. I don't know if that's correct, it just seems off to me - but i have no clue, hence me asking.

Also, does length matter, in this case (bwaha)? Or would we need to get a shorter one?

[cpostis]

Not being a rigging expert, however maybe the video in this link will give you some insight.

https://www.youtube.com/watch?v=3WEjuEKy8Uo

[m4inbrain]

Cheers, it helps to some degree.

I certainly will press oil through the cable tomorrow, didn't realize that "age" etc can be detrimental to the way the cable operates. As in, making it alot harder to operate.

[cpostis]

Mr. Boscoe CIA Secret Agent 99?

Boscoe, your the one with the secret intelligence (Don't Kill Me).

Look at the attachment under "Starting Serial #'s" for m4inbrain's motor. I see "-" for "S", "721947~" for "L". This is from a E48T, C55T service manual (model year 1994).
Does "S" stand for starting serial #, "L" for last serial # in the model year?
Can you decipher this and tell us if m4inbrain's model number falls in a 1994 model year or otherwise?

Thanks!

Can you help

[boscoe99]

Can you help

I forgot. Sorry.

Looks to be a 1993 model year motor.

[m4inbrain]

Thanks for that, it's running nicely now too. At least in idle and not in water (pumping water via muffs).

Still have to figure out why it isn't charging the battery, the previous owner made a mess of it. Loose cables everywhere, and only half way through reconnecting it (or rather, figuring out where they go).

One thing though, the manual describes a hose that came loose as "drainless hose". What's that supposed to be?

[cpostis]

One thing though, the manual describes a hose that came loose as "drainless hose"What's that supposed to be?

No idea? Specifically, what manual did you get this from?

[edited] OK, think I found them on page 5-34 in the manual I sent you.

Look at this link item # 12 (2):

1994 C55TLRS Yamaha Outboard CYLINDER CRANKCASE Diagram and Parts

I think these are the hoses you speak of. Looks like one end goes to check valves (# 3 in the parts diagram), the other ends I could not tell. Maybe your intake or carbies?

Good luck

[m4inbrain]

The one i've got off you.

I have no idea either, bit baffled. I'll take a picture tomorrow (too dark now and covered).

It's on 5-35 in that manual. Was mentioned another time too, just can't find it now - i guess a picture would be the best thing. It basically goes from the intake (hose roughly 5mm diameter) into the lower bracket, and that's where it rusted off. No clue what it's supposed to do.

[cpostis]

The one i've got off you.

I have no idea either, bit baffled. I'll take a picture tomorrow (too dark now and covered).

It's on 5-35 in that manual. Was mentioned another time too, just can't find it now - i guess a picture would be the best thing. It basically goes from the intake (hose roughly 5mm diameter) into the lower bracket, and that's where it rusted off. No clue what it's supposed to do.

Look at my edited post.

[m4inbrain]

Well.. The Manual really doesn't help with that.

It basically is a hose that connects from here:



To down here:



Sorry for quality, it's dark outside and holding a maglight with your teeth while trying to take a picture isn't fun.

It rusted off on the bottom bit, and we have zero clue as to what that hose was supposed to do. Any ideas appreciated.

[cpostis]

Better off waiting for daylight. But in your first image the rubber capped joint looks like is to be capped and no hose attached.
Please look at the parts diagram in this link:
1994 C55TLRS Yamaha Outboard INTAKE Diagram and Parts
The cap and joint are #'s 7 and 8.

Review the Parts diagram in the link I sent earlier for the hoses, and check valves, part #'s 3 and 12.

[Bus pants]

I know that motor pretty well, as I owned a 1993 C55.

The bottom picture is a recirc valve or sometimes called a puddle valve.

Normally there is a hose attached. The valve redirects unburned fuel/oil so that

it can be combusted.

[m4inbrain]

Yeah that's what i thought.

Thanks for clarifying, now we only need to get the motor to charge the battery - then it's done. For now. Electrics on the boat are for the most part done (needs a lanyard/switch still), ripped all the electrics out of the Yamaha 703 throttle and put it nicely on the center console, and well..

Then hopefully, .. boating!