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Start Sole mini-2 pushrod position

Old Marine Engine » Diesel Inboards » Start Sole mini-2 pushrod position « Previous Next »

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aldert
New member
Username: aldert

Post Number: 1
Registered: 05-2014
Posted on Saturday, May 17, 2014 - 04:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi,

Hope someone can help me. I had to replace te studs, because one was broken and the other three were severely corroded.
But i did not pay attention to the positioning of the pushrods. From above they look as if they are next to eachother, but at the bottom they are behind eachother.

So question: which one is for the inlet and which for the exhaust valve?

Thanks, Aldert
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aldert
New member
Username: aldert

Post Number: 2
Registered: 05-2014
Posted on Saturday, May 17, 2014 - 05:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Is of course a Stuart Sole.

And to specify the question a bit more:

is the gear side tappet for the inlet pushrod?

Aldert
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jb_castagnos
Senior Member
Username: jb_castagnos

Post Number: 921
Registered: 07-2002


Posted on Saturday, May 17, 2014 - 10:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I'm not familiar with your engine but if you know the rotation turn the engine, intake will open as the piston is descending, exhaust will open when the piston is rising.
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aldert
New member
Username: aldert

Post Number: 3
Registered: 05-2014
Posted on Saturday, May 17, 2014 - 12:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks,

true, but if the pushrods are the other way around you don't see the difference because the engine is 50% off track. He only injects the fuel when the exhaust valve is open.

Regards, Aldert
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jb_castagnos
Senior Member
Username: jb_castagnos

Post Number: 922
Registered: 07-2002


Posted on Saturday, May 17, 2014 - 05:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I'm not following you on this. If you turn the engine in the proper rotation, only the intake valve will open as the piston is going down.
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oslin04
Senior Member
Username: oslin04

Post Number: 73
Registered: 10-2006
Posted on Sunday, May 18, 2014 - 04:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Maybe this will help. with the engine on compression stroke with the piston at top dead centre the push rods will be down,
the next stroke the exhaust push rod will lift and the next stroke the exhaust will close and the inlet push rod will lift the next stoke will bring you back to the compression stroke at top dead centre with both push rods down,

as they used to say years ago
suck, squeeze, bang, blow.

hope this helps
Regards Keith
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aldert
Member
Username: aldert

Post Number: 4
Registered: 05-2014
Posted on Sunday, May 18, 2014 - 06:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The sole mini-2 is a one cylinder diesel. My problem is with the position of the pushrod on the downside. (see attachment) is it the situation above or below!

Thanks, Aldert
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hank_pronk
New member
Username: hank_pronk

Post Number: 2
Registered: 04-2013
Posted on Sunday, May 18, 2014 - 07:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Aldert, first you must determine when the injector is giving the engine fuel. When the injector actuates, that is your compression stroke.
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oslin04
Senior Member
Username: oslin04

Post Number: 74
Registered: 10-2006
Posted on Sunday, May 18, 2014 - 09:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Aldert, if you mean how do you tell whenn the engine is on compression stroke with both the push rods down,
roll the engine over and get to the point where nether the inlet or the exhaust push rod are moving when the piston is before tdc and after tdc that is the compression stroke when both push rods will be down, that is also the position at which you would set the tappet clearance.
hope this helps you
Keith Marine Engineer
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jb_castagnos
Senior Member
Username: jb_castagnos

Post Number: 923
Registered: 07-2002


Posted on Sunday, May 18, 2014 - 11:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Turn the engine in normal rotation, when you feel compression the piston is rising, if a valve is moving this is exhaust, one half turn and the piston will be falling, watch to see if one of the valves is opening, this will be the intake. If no valves are moving go through rotation again. If intake and exhaust are backwards the engine will probably run, taking air in through the muffler and exhausting through the intake.

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