Gear ratio of these outdrives?

[CurrentObsession]

Can anyone confirm for me what the ratios are of these Alpha drives? Thinking of replacing them with SEI versions as they look pretty bad.

​OL100186

​OL102986

 

[Bt Doctur]

It should be stamped into the case, or verify by rotating the input shaft untill you get 1 turn of the prop shaft. All 4 gear ratios were used
Do you know what motor they were connected to?

 

[Fun Times]

0L100186 = ALPHA 1.47 C/R (Counter Rotation ) ALPHA 1.47:1
0L102986 = MERCRUISER ALPHA 1.47 DRIVE ALPHA 1.47:1 (Standard Rotation)

 

[CurrentObsession]

0L100186 = ALPHA 1.47 C/R (Counter Rotation ) ALPHA 1.47:1
0L102986 = MERCRUISER ALPHA 1.47 DRIVE ALPHA 1.47:1 (Standard Rotation)

​Awesome.... How did you find this out?

 

[Fun Times]

​Awesome.... How did you find this out?

I looked it up... Happy I could help.:thumb:

 

[biggjimm]

​Awesome.... How did you find this out?

Actually, Fun Times is one of the resident "wizards" on here. Lol. It seems like it sometimes. I have googled stuff until I was blue in the face before & these guys will have an answer within minutes of posting a question sometimes.

And I, for one, am very grateful for the collective knowledge these folks have & share with us who aren't always so knowledgeable. This is an awesome site with awesome people. An extremely valuable resource & once again I thank each & every one of you!
Jim.

 

[Fun Times]

Thanks Jim, you just earned yourself 2 extra orange bars under your username with that "like" I did above.....

This boating site tends to run smoothly due to the team work of many collective members working together which includes you too.

 

[CurrentObsession]

You all are the best.... One last question, 1998 Sea Ray 290 sundancer with twins. Which side is the standard rotation vs counter rotation? And how can you tell when looking at it?

 

[Scott Danforth]

No Title

You all are the best.... One last question, 1998 Sea Ray 290 sundancer with twins. Which side is the standard rotation vs counter rotation? And how can you tell when looking at it?

see post #3, you have the serial numbers....

 

[achris]

Standard rotation goes on stbd side, counter rotate goes on port side. Always.