39 fan
 

After finnaly getting an engine in my 39 deluxe I am sorting things out. Cooling fan does not seem correct for this engine as it is barely 1/2 inch from radiator. It measures 4 1/2 inches from outside of hub to mounting flange and is 15 3/4 inches in diameter. I don't think this is a 91a fan but don't know. Does anyone know the correct dimensions of a 91a fan? Fan in question came off a 38 engine with short crank snout. Thanks, Mark

Re: 39 fan
 

It sounds as if you have the 39 / 40 Mercury fan. At first glance it appears identical to a 39/40 Ford fan. Upon closer inspection, you'll note the distance from the mounting surface to the hub is longer on the merc.
Fortunately for you, 39/40 fans are all over the place and reasonable.

Re: 39 fan
 

According to the 1939 t0 1948 Mercury Chassis Parts Catalogue the Mercury used the same Ford fan assembly 91A-8600 for 1939 and 1940. The 1941 Mercury fan has a longer snout and only fits the 1941 Mercury. My experience with 1939 and 1940 Fords is that the fan to radiator clearance will vary on each car by a small amount. One half inch clearance is a little tight but changing the fan will not help. You only need about 1/4 inch more clearance. I would try getting the radiator to go a little forward to get the needed clearance to replace the fan belt.

40larry

Re: 39 fan
 

According to the 1939 t0 1948 Mercury Chassis Parts Catalogue the Mercury used the same Ford fan assembly 91A-8600 for 1939 and 1940. The 1941 Mercury fan has a longer snout and only fits the 1941 Mercury. My experience with 1939 and 1940 Fords is that the fan to radiator clearance will vary on each car by a small amount. One half inch clearance is a little tight but changing the fan will not help. You only need about 1/4 inch more clearance. I would try getting the radiator to go a little forward to get the needed clearance to replace the fan belt.

40larry

Re: 39 fan
 

Thanks, the fan is crank mouted and radiator has little play. Fan kissed it on bottom. Per green bible fan should be 3.75 in. about 3 /4 inch shorter than the one I have. Thats why I was asking about a correct 91a fan. Mark

Re: 39 fan
 

You might have the wrong fan. It is supposed to be 16.75 inches diameter. Can you post a photo of your fan.

40larry

Re: 39 fan
 

This fan is 15 3/4 diameter which is another clue to it being incorrect. Sorry, can't post photo .

Re: 39 fan
 

Marko,
Here's a photo of a proper 85/95 hp '39 Deluxe / '40 (all) cooling fan.
If you had simply measured across two opposing blades, you'd come up with something near 15 3/4".
The hub to mating surface distance is in fact 3 3/4" for the Ford.

Be careful when using a parts book to determine absolute correctness. One must always remember that the parts listed are service parts that will fit and function but not necessarily be correct.

Re: 39 fan
 

Thanks, Mike. that is the fan i need. i am checking on some now. Mark

Re: 39 fan
 

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