Drive Gear Ratio Question.
10-06-2015 | 06:11 PM
#1
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From: Clarkston, Michigan
Drive Gear Ratio Question.
Is the gear ratio set in the lower of an XR/Imco drive? If so, why do my lower gears have 19 and 15 teeth when it's supposed to be 1.5:1. Is part of the ratio change in the upper too? Also, is the drive increasing or decreasing prop speed relative to engine speed? Thanks.
10-06-2015 | 07:32 PM
#2
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19 teeth on XR driven gear divided 16 teeth on the XR pinion gear = 1.1875 (upper) .
19 teeth on driven gear divided by 15 teeth on pinion gear = 1.2666 bla bla (lower)
1.1875 X 1.2666 bla bla =1.5041 overall gear ratio.
1 1/2 engine rotation = 1 turn of the propshaft.
hope this helps
mac
19 teeth on driven gear divided by 15 teeth on pinion gear = 1.2666 bla bla (lower)
1.1875 X 1.2666 bla bla =1.5041 overall gear ratio.
1 1/2 engine rotation = 1 turn of the propshaft.
hope this helps
mac
10-06-2015 | 07:45 PM
#3
Thread Starter
Registered
Joined: Oct 2005
Posts: 5,825
Likes: 612
From: Clarkston, Michigan
19 teeth on XR driven gear divided 16 teeth on the XR pinion gear = 1.1875 (upper) .
19 teeth on driven gear divided by 15 teeth on pinion gear = 1.2666 bla bla (lower)
1.1875 X 1.2666 bla bla =1.5041 overall gear ratio.
1 1/2 engine rotation = 1 turn of the propshaft.
hope this helps
mac
19 teeth on driven gear divided by 15 teeth on pinion gear = 1.2666 bla bla (lower)
1.1875 X 1.2666 bla bla =1.5041 overall gear ratio.
1 1/2 engine rotation = 1 turn of the propshaft.
hope this helps
mac
