Not a Kiekhefer so what can it be?

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green thumbs
Posts: 254
Joined: Mon Jul 06, 2015 1:21 pm

Re: Not a Kiekhefer so what can it be?

Postby green thumbs » Mon Feb 05, 2018 10:30 pm

Some very good news to share. Mercury K4 it is. Some more of the parts were dug up including the rope plate stamped K4. Also the original Eisemann 72H magneto and flywheel.
Apparently the 1940 twins has a small mounting snout originally and the Eisemann 72H had a
small center hole for mounting that year. 1941 twins has a stouter snout and the Eisemann 72H
in 1941 had a larger central mounting hole.
In the mean time a skilled machinist Joe B had made and fitted a sleeve. Now that the original magneto was on hand the sleeve was not needed. So some time was spent removing
the sleeve and fitting the original magneto. That led to discovery that the unique cast
aluminum handle that synchronizes spark advance and carburetor butterfly rub. Bent?
I am going to work

Please bear with me on duplicate photos. I am new to posting photos
Removing photos seems a little tricky for me at present.
Louis
Attachments
two steps back removing fixerjoe fine machined sleeve from k4 002.jpg
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two steps back removing fixerjoe fine machined sleeve from k4 008.jpg
two steps back removing fixerjoe fine machined sleeve from k4 008.jpg (1.36 MiB) Viewed 143 times
two steps back removing fixerjoe fine machined sleeve from k4 005.jpg
two steps back removing fixerjoe fine machined sleeve from k4 005.jpg (1.61 MiB) Viewed 143 times
Last edited by green thumbs on Tue Feb 06, 2018 3:27 pm, edited 1 time in total.

BillW
Posts: 746
Joined: Sat Apr 11, 2015 6:35 pm
Location: Cape Cod MA

Re: Not a Kiekhefer so what can it be?

Postby BillW » Tue Feb 06, 2018 5:27 am

What an exciting find, to get the K4 sheave! Too bad about having to lose that nice bushing,though.

What does the handle rub on? Is that the gas tank in the background? It would normally have a steel tank, wouldn't it?

green thumbs
Posts: 254
Joined: Mon Jul 06, 2015 1:21 pm

Re: Not a Kiekhefer so what can it be?

Postby green thumbs » Tue Feb 06, 2018 12:20 pm

magnificent magneto or maybe not 003.jpg
magnificent magneto or maybe not 003.jpg (1.53 MiB) Viewed 116 times
Of the several missing items needed to reconstruct, an authentic, limited production steel tank would have been the most unlikely to turn up. If and when the that should happen, it could be installed with no difficulty. It may even be that some K4 originally had a cast aluminum tank. Adapting a cast aluminum tank involved drilling two holes in the mounting bracket of the aluminum tank to match the mounting holes in crankcase. The two original
brackets are on hand if needed.
The 1940 Kiekhaefer twins were not a refined concepts. The cast aluminum magneto lever had a cam underside to engage the extension of carburetor butterfly shaft so as the spark was advanced or retarded the carburetor butterfly opened or closed. Com;lex, expensive and damage prone. 1941 evolved to a steel magneto handle/steel cam attached to underside of the magnet plate. Simple, inexpensive and durable.












water jacket
Attachments
magnificent magneto or maybe not 004.jpg
magnificent magneto or maybe not 004.jpg (1.66 MiB) Viewed 116 times

green thumbs
Posts: 254
Joined: Mon Jul 06, 2015 1:21 pm

Re: Not a Kiekhefer so what can it be?

Postby green thumbs » Tue Feb 06, 2018 2:01 pm

Mangneto handle synchronizing cam variety 011.jpg
Mangneto handle synchronizing cam variety 011.jpg
Eisemann 71H with larger diameter mounting hole and stamped steel handle & cam assembly. this will fit revise 1941 and later twins thru postwar up to change over to Bendix magneto which again involved a revised crankcase casting.
Note: to those, like myself, who are too eager to tear things apart...the collection of stamped steel magneto handles that will need some detective work to find their way back to magneto plates they belong to. Can only be done by comparing to unmolested examples.
Louis
Last edited by green thumbs on Tue Feb 06, 2018 3:20 pm, edited 1 time in total.

green thumbs
Posts: 254
Joined: Mon Jul 06, 2015 1:21 pm

Re: Not a Kiekhefer so what can it be?

Postby green thumbs » Tue Feb 06, 2018 2:07 pm

Mangneto handle synchronizing cam variety 008.jpg
Mangneto handle synchronizing cam variety 008.jpg (2.09 MiB) Viewed 81 times
Mangneto handle synchronizing cam variety 006.jpg
Mangneto handle synchronizing cam variety 006.jpg (2.09 MiB) Viewed 112 times
Mangneto handle synchronizing cam variety 002.jpg
Mangneto handle synchronizing cam variety 002.jpg (1.34 MiB) Viewed 112 times
Mangneto handle synchronizing cam variety 006.jpg
Mangneto handle synchronizing cam variety 006.jpg (2.09 MiB) Viewed 112 times
Magneto handle cam assembly for various Kiekhaefer outboards

green thumbs
Posts: 254
Joined: Mon Jul 06, 2015 1:21 pm

Re: Not a Kiekhefer so what can it be?

Postby green thumbs » Mon Feb 12, 2018 7:37 pm

A useful hint for those who may be working on a 1940 Kiekhaefer twin.
If the drill is straight up and down the holes in bearing block will align with the appropriate
holes in crankcase. The hole also serves to help locate bearing block fore and aft correctly.

I was curious about what purpose the hole served when considering how to install bearing block.
A Duh moment.
=-
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prime and paint k4 007.jpg
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prime and paint k4 006.jpg
prime and paint k4 006.jpg (1.61 MiB) Viewed 61 times
prime and paint k4 003.jpg
prime and paint k4 003.jpg (1.64 MiB) Viewed 61 times
prime and paint k4 001.jpg
prime and paint k4 001.jpg (1.66 MiB) Viewed 61 times

green thumbs
Posts: 254
Joined: Mon Jul 06, 2015 1:21 pm

Re: Not a Kiekhefer so what can it be?

Postby green thumbs » Wed Feb 14, 2018 2:03 pm

Adapting a later cast aluminum tank to a 1940 twin was not quite straight forward, but, not
that hard. Note the mounting holes are drilled oversize to allow a little slop...part of fit and try
The tank bracket had to be fitted to tank first then the magneto plate installed...no way to
fasten screws with magneto in place.

The 1940 twins used 2 short piece tank bracket. which were too short to reach tank mounting
studs. Later tank brackets are one piece.
Back fitting the later bracket did not require any alteration to crankcase. All fastener
holes were over sized so tank could be dropped in place without forcing. Ears on water upper
water jacket are often found to be damaged by rough handling so best to be as gentle
as possible.
Louis
Attachments
Trial Assembly 020.jpg
Trial Assembly 020.jpg (1.73 MiB) Viewed 35 times


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