Yamar starting procedure

TTwiggy

TTwiggy

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Hi all, some advice required please.

My new (to me) boat goes in the water next Monday, and I will be starting the engine for the first time. I know it's all in good order, as the previous owner has kept it maintained, and had it checked over before my purchase.

But while I don't envisage any problems, I'm still a little unsure on the correct starting procedure. It's a Yanmar YSB8, with electric start. The throttle has two control arms - a short one to the front, and a longer one behind. I'm sure that the long one is 'speed' and the short one 'fore and aft control'.

From what I've gleaned on the net, it seems that the starting procedure is gear control in neutral (mid position), throttle 2/3 power and then crank. I've seen reference to a compression control, but I don't seem to have one of those.

Can anybody with experience of this engine give me a pointer or two?

Many thanks
 
TTwiggy said:
Hi all, some advice required please.

..

But while I don't envisage any problems, I'm still a little unsure on the correct starting procedure. It's a Yanmar YSB8, with electric start. The throttle has two control arms - a short one to the front, and a longer one behind. I'm sure that the long one is 'speed' and the short one 'fore and aft control'.

.Many thanks
Click to expand...

On my YSE8 the functions were the other way round, ie short lever was speed, long was fwd/astern.
 
You will find a little lever on the cylinder head which is the decompression lever - it lifts the exhaust valve so you can turn the engine easily. Should not be any need to use it for normal starting, but is used if you hand start or you can turn the engine over a couple of times to get oil flowing.

Your start procedure is right. The small lever is the speed control and needs to be open for starting as it injects extra fuel in. Gear lever in neutral. Once the engine starts you can lower the speed. Don't be surprised if it sounds like a bag of nails - it should smooth out a bit once it warms up!
 
earlybird said:
On my YSE8 the functions were the other way round, ie short lever was speed, long was fwd/astern.
Click to expand...

Same here on a YSE 12. Be careful when lowering the revs as the engine shut off position is the fully forward position of the throttle. Might take a bit of practice as the last thing you want is to kill the engine at the wrong moment :o
 
Tranona said:
You will find a little lever on the cylinder head which is the decompression lever - it lifts the exhaust valve so you can turn the engine easily. Should not be any need to use it for normal starting, but is used if you hand start or you can turn the engine over a couple of times to get oil flowing.

Your start procedure is right. The small lever is the speed control and needs to be open for starting as it injects extra fuel in. Gear lever in neutral. Once the engine starts you can lower the speed. Don't be surprised if it sounds like a bag of nails - it should smooth out a bit once it warms up!
Click to expand...

there is also an injection port on the inlet manifold, this is for engine oil to be added for cold start. it would need to be very cold before it were needed in my experience
 
flipper said:
Same here on a YSE 12. Be careful when lowering the revs as the engine shut off position is the fully forward position of the throttle. Might take a bit of practice as the last thing you want is to kill the engine at the wrong moment :o
Click to expand...

Ah - I thought the kill position was fully back...

It's only a short motor round from the crane-in position to the marina berth, so a couple of false starts won't be a disaster (I hope)
 
You can tell which lever is which by looking at the rear of the engine. This is where the gearbox is and you should see a lever moving backwards and forwards when you move the gear lever. You should also feel the lever engaging forwards and backwards gears when you move it. Vertical should be neutral. The throttle lever should feel smooth when you move it from Vertical forwards to fully open.
3/4 to full throttle to start and as soon as it fires up ease back to a fast tickover. There is no different procedure for cold starting. Back to vertical with the throttle should stop the engine. They are noisy old things and will rattle out your fillings but they do run forever on a gallon of diesel.

I once had a surveyor tell me the throttle needed adjustment as the engine died when the lever was pulled fully back. he obviously knew his stuff:rolleyes: I wonder how he thought I was supposed to stop the engine.
 
yanmar recommend that you operate the stop control as you crank the engine after the engine has been idle for a period of time, this is to let oil circulate before you fire it up.
 
Spyro said:
You can tell which lever is which by looking at the rear of the engine. This is where the gearbox is and you should see a lever moving backwards and forwards when you move the gear lever. You should also feel the lever engaging forwards and backwards gears when you move it. Vertical should be neutral. The throttle lever should feel smooth when you move it from Vertical forwards to fully open.
3/4 to full throttle to start and as soon as it fires up ease back to a fast tickover. There is no different procedure for cold starting. Back to vertical with the throttle should stop the engine. They are noisy old things and will rattle out your fillings but they do run forever on a gallon of diesel.

I once had a surveyor tell me the throttle needed adjustment as the engine died when the lever was pulled fully back. he obviously knew his stuff:rolleyes: I wonder how he thought I was supposed to stop the engine.
Click to expand...


long lever = gear shift
 
TTwiggy said:
But while I don't envisage any problems, I'm still a little unsure on the correct starting procedure. It's a Yanmar YSB8, with electric start. The throttle has two control arms - a short one to the front, and a longer one behind. I'm sure that the long one is 'speed' and the short one 'fore and aft control'.
Click to expand...
Is this the beasty?

17.jpg
 
Err - in all the excitement about the control levers did anybody say open the cooling water seacock before starting, shut it if the engine needs several attempts and when it's finally running peer over the stern to see the water coming out?
 
richardabeattie said:
Err - in all the excitement about the control levers did anybody say open the cooling water seacock before starting, shut it if the engine needs several attempts and when it's finally running peer over the stern to see the water coming out?
Click to expand...

Ah - and where might one find such seacock? (assuming that's not a 'how long is a piece of string question)
 
sailorman said:
inside the boat :D
near the engine follow the hose back from the raw water pump ;)
Click to expand...

Cheers - I guess I asked for that! This is all new to me though, so forgive my ignorance. Up till now I've only had dinghies and a day sailor with outboard, so I'm on a steep learning curve.
 
I wonder if you can get the manual off the internet or if someone has a copy they could scan. It would help to understand the engine better -emergency repairs/servicing/lubricating the prop gland, starting by hand etc
 
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