small block v8 with a 1.98 ratio sterndrive??

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lime4x4

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Here is the number off the sterndrive i was able to find it after scraping some paint off 0C383695 before that it's either 1.50R or 2.50R. Then i marked the prop and crankshaft i turned the crankshaft 2 full turns till the prop turned once.So by my calculations that's a 1.98 ratio sterndrive. Which would explain why i have such poor performance out of this boat. So it looks like my only option is to buy a new sterndrive to get the correct ratio.
 
Bt Doctur

Bt Doctur

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Re: small block v8 with a 1.98 ratio sterndrive??

Or have the gears in the upper replaced with 1.50`s
 
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lime4x4

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Re: small block v8 with a 1.98 ratio sterndrive??

Which will probably cost just as much as a new sterndrive...lol
 
Reel Poor

Reel Poor

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Re: small block v8 with a 1.98 ratio sterndrive??

Before you dismiss the drive completely, pull the top off the drive and count the teeth on the two gears, then divide the small number into the larger number just to be sure.

The case, according to you previous post says it's a 1.50:1. If it's not someone has changed the gears in the drive.
 
180shabah

180shabah

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Re: small block v8 with a 1.98 ratio sterndrive??

Replacing the upper gearset is not that expensive, a new drive will set you back at least $1200
 
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lime4x4

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Re: small block v8 with a 1.98 ratio sterndrive??

I i'm a chevy tech so working on stuff like that isn't a problem.Just don't feel like buying the tools necc to do the job properly..
 
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lime4x4

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Re: small block v8 with a 1.98 ratio sterndrive??

If i decide to bite the bullet and just buy a new sterndrive which one?
the boat in question is 86 searay almost 27 feet long and probably weighs close to 6500 lbs when loaded.Single 260 hp 5.7 4bbl carb engine The 1.5 or the 1.62 ratio drive?
 
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lime4x4

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Re: small block v8 with a 1.98 ratio sterndrive??

well i decided to buy the correct upper sterndrive unit.Got one from ses with a 3 year no fault warranty for 665.00 shipped. Also ordered the drive shower kit for it as well.
 
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