What year leg will fit a 125 hp 1969

[jcsercsa]

Hi all


Well I was out yesterday and my lower leg froze up on me !! we got towed in and pulled the lower leg and yep she isn't in good shape !! she is bound up inside !!!!##$$@@#$%%%###@@

So I am thinking that a new used leg is going to be the way to go !!!

What I an looking for is what years legs will fit ? Isn't it from 66 threw 78 ?

I got a 1969 125 hp, merc, inline 6 !!

and what models will fit ?? isn't it from a 90 to a 150 leg will fit !!

OK thanks guys ahead of time !! John

 

[emckelvy]

Re: What year leg will fit a 125 hp 1969

This recent thread will answer your question:

http://forums.iboats.com/showthread.php?t=345156&highlight=groove

HTH.............ed

 

[jcsercsa]

Re: What year leg will fit a 125 hp 1969

This recent thread will answer your question:

http://forums.iboats.com/showthread.php?t=345156&highlight=groove

HTH.............ed

Thank you ED . just what I was looking for !!

In your post there you wrote [if you can find a nice stainless-shaft lower from a 4-cyl 850, 80hp, or 75hp, your 100 will like the 2.3:1 gears.] will that also work with the 125? that would be cool if it did, and I could find one !!

Is'nt the one on it now a 1.87 leg ??

and also what would that 2.3:1 do for the speed ?

Again thanks ED !!!!! John

 

[emckelvy]

Re: What year leg will fit a 125 hp 1969

Depends on how it's propped now. The diff between your gear ratio and a 2.3:1 would be about 4" of pitch. Most rigs end up being overpropped anyway so the change would help. Just like installing 4.56 gears in a hot-rod Chevy!

If you're already perfectly propped, you'd have to install a larger-pitched prop to make up for it.

What that ratio does do is give you a much wider range of props to try, you can usually get higher-performance props in the 20" -24" pitch that wouldn't necessarily work with your existing lower unit.

If you have a tach on your boat, it'd help to post your Wide Open Throttle (WOT) rpm with just you in the boat. Then we'd be better able to guess-timate what the change will be.

Cheers......ed

 

[jcsercsa]

Re: What year leg will fit a 125 hp 1969

OHHH no I am way over proped now , I been asking a few question in the prop foeum!!

I am only getting 3700 rpms out of her now 43 mph. there is a bronze 18 pitch 3 blade on there now !! I was thinking i was going to have to drop to a 13 pitch to get the rpms up to the 4800 to 5300 she is rated for !!! I also checked all cylinders and they were all getting 123 to 127 psi !!! so thats great !!

I only got this motor a month ago !! got her cheap !! I can afford to put a few bucks into her !!and as long as the heads all good its worth it !! she moves my glastron sportster t166 tri-hull,

Ol so if i can find a 75 to a 90 4 cyl or from a 66 up on the reg in line 6's i should be good !!! Ohh from a 90 to a 150 hp right ?? as long as its not the Big Foot series ?

John

 

[emckelvy]

Re: What year leg will fit a 125 hp 1969

Any of the lower units mentioned in the linked thread would bolt up to your motor. You are seriously overpropped and a 2.3:1 lower unit would certainly help.

Your Glastron isn't exactly a hi-performance hull and it's to the 1250's credit that, even being madly overpropped and burdened with a "low-performance" prop, it's going fast as it is.

A modern, 17" or 15" pitch 3-blade aluminum prop should get you in the correct rpm range.

The 2.3:1 gear ratio means less propshaft turns for any given engine speed, compared to the 1.87:1 gearbox. Couple this to a lower-pitched, larger-diameter prop, and you'll run a lot more efficiently.

Check your local www.craigslist.org classifieds, you never know what bargain is lurking there in a parts motor. Lots of stuff on eBay too, but you'll likely pay a lot more.

HTH & let us know how it turns out.

 

[jcsercsa]

Re: What year leg will fit a 125 hp 1969

Thanks Ed !! it wont be till after christmas for the motor !! got a little work to on the baot before she get worked on !!

I will let you guys know !! John