Outdrive 1.84 replaced with a 2.00

[bksah2]

Hi all ,,,A co-worker of my replaced his merc. outdrive that was geared at 1.84 with a newer one gearsd at 2.00 the motor is the 470 and he loves it ..i though the change would blow the motor ...does the change really make that big of a differance from 1.84 to 2.00 ..... bksah2

 

[Bondo]

Re: Outdrive 1.84 replaced with a 2.00

Ayuh,... It's probably about 4" to 6" of Prop difference...

 

[45Auto]

Re: Outdrive 1.84 replaced with a 2.00

2.00-1.84 = .16

.16/1.84 = .087 = 8.7%

He changed his final drive ratio by less than 10%.

He essentially made a change equivalent to dropping his prop pitch by one size (lets the engine rev up quicker, it will accelerate and pull better). For example, if the prop on it is a 19" pitch, it will now run the same as if he had a 17" pitch prop (10% lower than 19") on the ORIGINAL drive.

 

[bksah2]

Re: Outdrive 1.84 replaced with a 2.00

WoW guys,,, i know very little about prop sizing and what it does to boat proformance...but when i see some of the replys i am glad that there are some smart guys out there...I would love to here more about whether this is a good move or a bad move so i can pick on him or praise him

THANKS

 

[CheapboatKev]

Re: Outdrive 1.84 replaced with a 2.00

WoW guys,,, i know very little about prop sizing and what it does to boat proformance...but when i see some of the replys i am glad that there are some smart guys out there...I would love to here more about whether this is a good move or a bad move so i can pick on him or praise him

THANKS

So you joined a boat forum just to double check what a buddy did???

 

[bksah2]

Re: Outdrive 1.84 replaced with a 2.00

hi cheapboatkev...the guy i work with, who did this has aways been kinda of a knowitalll and i am trying to beat him at his own game... any info you have on his swap good or bad would be great ....Thanks

 

[CheapboatKev]

Re: Outdrive 1.84 replaced with a 2.00

I hate those guys, till I need them I guess, lol

Well it seems he could have simply change his prop to the 17 inch and gotten the same result as swapping his lower..Kinda 51/50...

But a prop change woulda been a 10 minute job versus ???? & $$$

BTW...I am no expert, just re reading the data from 45auto, and I do trust his #'s.