Gear Ratios - Confused

[AList233]

In the process of refinishing my AQ280 -DP/PT. I'm confused as to the proper gear ratio of the upper gear unit. The tag is in pretty bad shape, but it appears to be a 1.61:1 ratio. From my reading of this forum, I've been led to believe that the 1.61:1 is for a V-8 application. I am running a '98 Volvo Penta 5.7 Gi.

But when I refer to the workshop manual, it states the AQ280-DP/PT was only available in 1.95 or 2.30.

Should I be concerned and do I need to change the gear unit to a 1.95?

 

[Maclin]

Probably not. The top unit ratio is the same for either DP or SP. The lower DP unit has another gear reduction to where putting a DP lower unit on changes the 1.6 to 1.95. The SP lower unit is 1:1 regarding gears.

 

[AList233]

Thanks, Mac. I was hoping not to have to spend a fist full of cash for another gearcase.

 

[PatinIdaho]

To find out the ratio for positive take off the prop and the ring anode behind it. Stamped on the bearing carrier you will find the gear ratio.

 

[AList233]

PatinIdaho, I will check the lower unit stamping tonight. The unit is already prepped for paint, so the anode is already off.

Thanks for the help!!