Unusual Small Engine?

Unusual Small Engine?

This topic has 10 replies, 6 voices, and was last updated 11 January 2022 at 19:59 by KEITH BEAUMONT.

Viewing 11 posts - 1 through 11 (of 11 total)

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8 January 2022 at 16:17 #579262
Martin King 2
Participant
@martinking2
Hi All,

Here is a small engine that was in with yesterdays auction lots; any info much appreciated.

115mm tall not inc the brass bit at the top and cylinder head is 36.5mm diameter widest. Crankcase is aluminium.

No idea what the brass bit is for?

Cheers, Martin
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8 January 2022 at 16:17 #33945
Martin King 2
Participant
@martinking2
8 January 2022 at 16:36 #579264
Ramon Wilson
Participant
@ramonwilson3
Looks like (not is) a Sparey 5cc – I'd say the brass serves no purpose unless its a jury rigged compression screw?

Tug
8 January 2022 at 16:43 #579266
jon hill 3
Participant
@jonhill3
My best guess is an unfinished compression adjustor, if this is a diesel engine. I used to have a few model diesel engines and you had to lower the compression to get them started or at least hot and then gradiually increase the compression. Do you have any other pics?
8 January 2022 at 16:46 #579267
Martin King 2
Participant
@martinking2
Hi, Will post some more pics tomorrow, we are busy ploughing through our haul of stuff! Great Fun!

Cheers, Martin
10 January 2022 at 12:27 #579564
KEITH BEAUMONT
Participant
@keithbeaumont45476
Hi Martin,

The diameter of the cooling muff is exactley Sparey 5cc Diesel. The crankcase is someones version of machining from solid , in place of a casting. I am curious about the brass part where a compression screw should be. Have you investigated further?

Keith.
10 January 2022 at 12:35 #579568
Former Member
Participant
@formermember12892
[This posting has been removed]
11 January 2022 at 09:34 #579745
Martin King 2
Participant
@martinking2
Hi All,

The larger diameter part of the brass section seems to be in two pieces, will have a go with some soft jaw pliers when I get out to the shop late on.

Here are some more pics as requested:

Cheers, Martin
11 January 2022 at 12:16 #579799
KEITH BEAUMONT
Participant
@keithbeaumont45476
Definately a version of the Sparey 5cc Diesel. The cooling muff needs turning 90 degrees.

Keith.
11 January 2022 at 12:21 #579801
JasonB
Moderator
@jasonb
Although the shape of the crankcase suggests it may have been bolted down to something flat like a tether car chassis in which case the slots in the head go the right way
11 January 2022 at 19:59 #579910
KEITH BEAUMONT
Participant
@keithbeaumont45476
I think you are spot on with that suggestion Jason. The chunky crankcase will add to the weight on the driven wheel.

Keith.
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