1986 Bayliner cuddy AQ125B penta 270

[Crazy 8]

Novice to ownership...so far I converted points with hot spark conversion...changed the plugs...added sum dress ups n re-did sum upholstery...going to replace the impeller (kit is on its way)...how do I identify the outdrives gear ratio and determine the proper prop (not sur the 1 on it is rite)? Is there any difference in performance with LH n RH ( I know I can switch the drive between the 2)

 

[captmello]

The outdrive ratio is 2.15:1. prop rotation makes no difference.

Welcome, BTW.

 

[jerryjerry05]

What size is on there now?
How big is the boat? A 17ft. takes a different prop than a 21.
The 17 should be about a 19p the 21 a 17p
The market is flooded with aftermarket props.
Get the factory one.
The 125 needs the big sweep of the Volvo prop blades.

A friend asked me to look into why his boat wasn't performing the way it should.
I went through comp, spark, timing and the fuel system. NOTHING

As I got out of the boat I noticed an old prop on the ground.
Then saw a new aftermarket on the boat.
I asked if they had just changed the prop? Yup.
The aftermarket had the same pitch but shorter chopped off blades.
Changed it back and the boat was back to normal.

 

[Crazy 8]

Thanx for the info gentlemen...mine is a 21'. She has michigan prop on ther now (not sur of the pitch) I did notice a definite size difference in the aftrmrkt vs factory ive seen...any tips on gettn the outdrives drain plug out? went to chang the oil n tht thing ddnt wna budg