Engine question

[hwrd442]

Guy says it's a 4.1. Looks like 4.6 to me.
https://www.ebay.com/itm/HPI-4-1-EN...rentrq:6840f9fd16f0aad9b309ab22ff946a76|iid:1

 

[X]

Definitely a F4.1. Linked below is HPI's listing for that engine.

https://www.hpiracing.com/en/part/1408

The K4.6 has a scalloped head. Link below.

https://www.hpiracing.com/en/part/15201

 

[hwrd442]

See the difference?

 

[X]

See the difference?

F4.1 on the left, F4.6 on the right. Confused as to what your point is. The guys auction does appear to be an F4.1, as he claims.

 

[hwrd442]

F4.1 has silver crankcase and 11 cooling fins. F4.6 has grey case with 12 cooling fins.