Value of 1950s Mercury race motor

[kevboy]

I am selling this motor and would like an estimate on estimated value

[DAVID]

what is it kg4 kg7 mark20?

 

[kevboy]

I believe it’s a mark20 but I am not sure. there is no ID plate on the motor. She does seem to have a lot of Mark though20H parts though.

[CHUCK]

811-467  Block as seen in your picture.  That is Mark 25 I think;  although maybe it is unknown what if any alterations have been done to it internally.

Value is a tough thing to establish;  even more so if we don’t know who did the work on it and what they did exactly.

I suppose you are asking for a “range” of price.

[John Schubert]

The value is in the drive shaft housing & gear. That value is dependent upon the feel of the gear mesh & ratio 1:1 or 16:21.

Chuck is correct it is a MK25 block, probably no pads unless it is a block with the single pad. It has a MK25 flywheel but has a MK 20H Carter N carb. The stacks & filler block, if there is one might be an asset to someone.Depending on the variables mentioned above, price range $800 – &1500

[John Schubert]

The value is in the drive shaft housing & gear case. That value is dependent upon the feel of the gear mesh & ratio 1:1 or 16:21.

Chuck is correct it is a MK25 block, probably no pads unless it is a block with the single pad. It has a MK25 flywheel but has a MK 20H Carter N carb. The stacks & filler block, if there is one might be an asset to someone.Depending on the variables mentioned above, price range $800 – &1500

[kevboy]

Thank you gentlemen for the information. Is there a chart with the block casting numbers listed? I bought this 10 years ago or so and did a cosmetic restoration on it. The seller had no info on it. It does have spark and I got it to pop off on a short blast of spray. It also came with a Ka 2a carb  and 3 extra 2 blade props, 2 bronze and 1 stainless sreel. Again thanks for the info!

[Author]

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