Stock 1997 174 Sei 4.3lx prop ?

[Dillle209]

I honestly don’t know much about props but i brought the boat with a 19 prop and i don’t think it’s getting much performance from it . It goes around 35 at 4200 rpm but i haven’t had a chance to WOT to see top end speed .what propeller is oem with this boat i heard it was 14/23

 

[alldodge]

If you have a 1.81 ratio drive, your slip is at 16%, not great for a 17 footer, and at 4600 rpm you should reach at least 38 mph if your using GPS


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[porscheguy]

A 17 foot boat with a 4.3, assuming it had 1.81 gearing should be able to turn 21s and 23s without trouble. Especially if it’s a vortec. My 19’ w/vortec 4.3 and that ratio turns 21s and some 23s and it goes much faster.

im wondering if someone swapped on a drive with taller gearing as a cheap fix, or if they went lower on pitch to conceal engine trouble.

 

[Dillle209]

A 17 foot boat with a 4.3, assuming it had 1.81 gearing should be able to turn 21s and 23s without trouble. Especially if it’s a vortec. My 19’ w/vortec 4.3 and that ratio turns 21s and some 23s and it goes much faster.

im wondering if someone swapped on a drive with taller gearing as a cheap fix, or if they went lower on pitch to conceal engine trouble.

What would you think would go well with the 21? 14x21?

 

[porscheguy]

Don’t be too concerned with diameter. Anything between 13.25 and 14.5 is fine for a boat your size. You can do a 21 or a 23 in all likelihood. I’d start with a 21. If you redline or hit the limiter, you can go up to a 23. I assume you’re using aluminum?

 

[Dillle209]

Don’t be too concerned with diameter. Anything between 13.25 and 14.5 is fine for a boat your size. You can do a 21 or a 23 in all likelihood. I’d start with a 21. If you redline or hit the limiter, you can go up to a 23. I assume you’re using aluminum?

Yes and if i get the 21 what would i be looking for to know if i should go 23?

 

[alldodge]

You haven't even made it to WOT yet, get there first before making any decisions

 

[Dillle209]

You haven't even made it to WOT yet, get there first before making any decisions

Okay i will when i take it out next time .i know forsure wot is 4800+