O/B Vibration ???

Sirius_Bane · 22 April 2005, 05:40

Hi there, just happily launched my new SIB with a 25hp Merc 2 stroke.
Everything went well. Just I was a bit concerned by how much the engine was shaking.
Is this due to it being a 2 stroke?
It was the worst at idle then slowly went away as I powered up.
Its no problem just i was wondering if this is normal for a 2 stroke?

Pete7 · 22 April 2005, 08:59

Oh yes, so don't worry about it.

Pete

Swifty · 22 April 2005, 09:26

I guess you must still be breaking the engine in. Is it double oiled still?

Keith Hart · 22 April 2005, 09:56

Hi

I think that you will find it is a bit smoother when you are runing on lower oil ratio also you may find that you need to speed up the tickover a little.

Keith Hart

Sirius_Bane · 22 April 2005, 10:28

Yes, im currently running the engine at twice the oil ration for the recommended break in procedure. That could be the cause.
What do you mean by tickover?

Louise · 22 April 2005, 10:29

When the engine is running but not in gear.

Sirius_Bane · 22 April 2005, 10:33

How do you speed up the tickover? Is that when you turn the primer knob clockwise?

Louise · 22 April 2005, 10:49

Evidently I was talking nonsense!

Searider · 22 April 2005, 10:54

[P.S. I'm probably talking nonsense!

[/QUOTE]

Only a little

Louise · 22 April 2005, 10:55

So come on then Duncan - teach me!

Pete7 · 22 April 2005, 14:55

Lou, tickover is normally the idle speed in forward, in water, but not a bad guess for a girlie

Pete

Louise · 22 April 2005, 15:21

Ta Pete.

It only took nearly four and a half hours for someone to correct me.

And it hasn't only been 'girlies' (I'll get you later for that

) looking at this thread, I bet!

Anyway Pete & Duncan, stop having a little pop at me and give Sirius the help he needs! Then I wouldn't feel the need to try!

Pete7 · 22 April 2005, 15:40

Quote:

Originally Posted by Louise

Ta Pete.

It only took nearly four and a half hours for someone to correct me.

And it hasn't only been 'girlies' (I'll get you later for that

) looking at this thread, I bet!

Anyway Pete & Duncan, stop having a little pop at me and give Sirius the help he needs! Then I wouldn't feel the need to try!

Yes Miss,

Pete

Quote:

Originally Posted by Sirius_Bane

How do you speed up the tickover? Is that when you turn the primer knob clockwise?

Have a look at the throttle linkage on the side of the carbs. There is normally one large screw which controls the throttle stop position and therefore the minimum engine revs.

Pete

Scary Des · 22 April 2005, 15:41

It’s Friday afternoon and I haven’t been on my soap box or started an argument for at least an hour

but Pete I don’t think you are right mate

Tick over is an engine that is running but not driving, in other words with the gears in neutral. Sure people speak about driving a boat at tick over but they really mean at idle revs. So lou you were right

that is so hard to say for a chauvinist like me and especially about engine matters.

I need to go and lay down

Des

Pete7 · 22 April 2005, 15:44

Des, I am willing to wager a bottle of Port on this

Pete

Scary Des · 22 April 2005, 15:45

Quote:

Originally Posted by Pete7

Des, I am willing to wager a bottle of Port on this

Pete

Old tawny ?

Pete7 · 22 April 2005, 15:47

Depends whats in the Cellar, but you might have to settle for a bottle of Cockburns

Pete

Scary Des · 22 April 2005, 15:51

that's a deal

http://dictionary.cambridge.org/define.asp?key=82932&dict=CALD ]Tick over [/URL] Dictionary Definition

you have my address

Des

Pete7 · 22 April 2005, 15:54

Nope sorry, the evidence,

http://www.marinepower.com/download/dosearch

page 17 of the 25 hp engine manual

"Idle speed in forward gear 750 +- 50"

Pete

Scary Des · 22 April 2005, 15:59

Quote:

Originally Posted by Sirius_Bane

....What do you mean by tickover?

The original question was what is meant by tick over, you have answered what is the specific setting for an outboard. I win

Des