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CLAE F6

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Dave Bass
Posted on Wednesday, October 02, 2002 - 08:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi All ..
I have a CLAE F6 in my boat that was discovered new in a Crate .! My question is after fitting in the boat it vibrates quite a Bit . At high or Low RPM its not bad , but at cruising speed it's a Problem . I guess that the Flywheel needs balancing . Are there any suggestions for balancing the Flywheel or even trying different engine mounts .??
Looking forward to your advice .

.....Dave..
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miro
Posted on Wednesday, October 02, 2002 - 10:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Before getting involved with the engine, make sure that your propeller blades all have the same pitch. You'll have to put the prop on a test jig ( I use my lathe) and take a series of angular measurements ( eg mid-point, 3/4 and the tip) of the blades. You'll likely find that one of the blades is out of whack with the others( I assume that you have a 3-blade prop).
Fixing it can be done but it does take some skill.
My experience has been that out-of-whack blades are quite common and people have learned to live with the vibration simply because the boats are old and the expectation of good performance is quite low.

Another problem might be cavitation at the tip. One easy fix I have used is to turn the prop around, but this assumes that your prop does not have a taper fit.

miro
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Jim Rankin
Posted on Sunday, March 30, 2003 - 07:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Dave,
I have two Clae F6 motors. One in the boat and one on the bench. They do suffer from vibration. As you can appreciate you have one big cast iron piston (weighing aprox. three and half pounds diplacing close to 800cc's) and a couple of dam big bearings holding the force of the piston, crank and flywheel. If you are going to balance anything take the three together and get the lot balanced properly. You should get it balanced close to 800-1000 rpm. Don't use rubber engine mounts or she will jump out of the boat.
Regards
Jim...
PS If you don't like the motor I know where there are Blaxland twins but they spin the other way!
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Robert Russell
Posted on Sunday, April 11, 2004 - 05:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

My Name is Robert Russell and I am after a complete Clae F6 Motor to re install back into my
Little Clinker. Any condition is welcomed as i
will re build it any way.
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Paul Smith
Visitor
Posted on Saturday, February 09, 2008 - 12:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

where can i buy a cylinderhead for a Clae F6? what sparkplug does it use? any suggestions appreciated
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marks
Senior Member
Username: marks

Post Number: 97
Registered: 03-2002
Posted on Tuesday, February 12, 2008 - 06:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Paul,

You cannot buy original parts for the CLAE F6 nor F10's. However there is at least one set of patterns in circulation so occasionally there are new heads available for the F6. These are usually aluminum although the last one I saw was iron.

The availability of these is quite sporadic and the quality can be variable.

If you can find a second hand iron head then that is usually the best way to go. Although there are very few about now.

You can use a Champion D Series Plug. I've used D16's and D23's in a twin F10. They are alittle bit short (threaded portion) but work fine.

Good Luck

Mark S
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todd_vidgen
Member
Username: todd_vidgen

Post Number: 8
Registered: 03-2008
Posted on Sunday, March 30, 2008 - 02:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Claes and Simplex singles need strong ,long engine
bearers because as jim said thats one big lump of a piston thumping up and down,also shaft alignment is
critical on all motors NOT MORE THAN .005".
Timing is also an issue ,so make sure it is right
near enough aint good enough,
If you can talk Hardman and Hall into suppling
an undrilled head a Simplex 6/7 single will fit
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todd_vidgen
Member
Username: todd_vidgen

Post Number: 9
Registered: 03-2008
Posted on Sunday, March 30, 2008 - 02:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Me again, I forgot to mention ,you have solid mounted your engine ? Rubber mounts dont work
with fixed shafts,and they can create harmonics
at certain rpms
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narrau
New member
Username: narrau

Post Number: 3
Registered: 02-2008
Posted on Monday, June 02, 2008 - 01:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Can anyone tell me the correct spacing for the Clae F6 tappets?I have been told 0.001 but it seems rather tight. Would appreciate your comments
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todd_vidgen
Advanced Member
Username: todd_vidgen

Post Number: 33
Registered: 03-2008
Posted on Monday, June 02, 2008 - 08:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

0.010 for both inlet and exhaust
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David Howard
Visitor
Posted on Wednesday, July 09, 2008 - 06:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I just put a Clae F6 motor for sale on Ebay - it is a relatives - and I am not a boaty. It is listed under "inboards". It is available for pickup from Morayfield Queensland, Australia.
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Peter Gundelach
Visitor
Posted on Thursday, August 27, 2009 - 10:32 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Original CLAE F-10 brochure lists KLG TML-50 as correct plug. It was an 18mm, 3/4" reach, 'hot' plug. There is some variety in the length of thread in these heads. Adaptors to convert holes to 14mm plugs are available.
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todd_vidgen
Senior Member
Username: todd_vidgen

Post Number: 136
Registered: 03-2008
Posted on Thursday, August 27, 2009 - 06:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I dont like your chances of getting a Klg plug
these days,but here is a list of plugs and makers
that are compatible
NGK, AP5FS
Denso,MA16P-U
Bosch,D9B
AC,C85TC
Champion,F11Y
It might be noted that these are the same plugs
that fitted the early Ford Cortinas,Escorts,
Falcons,Mustangs,4,6,8 cylinder engines
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Peter Gundelach
Visitor
Posted on Wednesday, October 29, 2014 - 06:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The KLG TML-50 is available in England. A company over there has had them re-manufactured. I have been using them in my CLAE F-10 without a hiccup.

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