Outdrive Gera Ratio 1988 Ciers sunbridge 28.5-gctid394575

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Anyone know what the correct outdrive gear ratio should be in a 1988 Ciera Sunbridge 28.3 5.7 350 GM ?

Thanks

[tonyiiiafl Seasoned Member Find all posts View Profile Close tonyiiiafl]

IF it were a Volvo SP then the 1.61 ratio. If a DuoProp (Volvo) then a 1.95 ration with that engine. We need to know what type outdrive it is to be able to give an opinion.

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tonyiiiafl wrote:
IF it were a Volvo SP then the 1.61 ratio. If a DuoProp (Volvo) then a 1.95 ration with that engine. We need to know what type outdrive it is to be able to give an opinion.

Sorry I neglected to include that. Its a OMC Cobra. I went to Brunswick and they advised it is 1.5 to 1

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'88 OMC 5.7's were 1.41. 5.0L's were 1.50.