Wanted Merc Speedmaster V drives
 

Wanted pair of Mercury Speedmaster V drives . Call Jimmy 401-942-2400 weekdays


http://www.offshoreonly.com/classifieds/wanted_v_five_merc_drives-o43929-en.html

Do you need gimbles also?

No . What do you have ?

2 ssm gimbles, were new old stock in boxes put on and used less than 20 hours there like new, and 2 ssm3 drives. Not 3as

Walter Collins " TKO" has a set of beefed-up 4's, low hours, call him at Great American Pub in Raynham/Taunton,MA.

I kept cracking the lower gear cases on the IV drives a few inches up from propshaft . When the fives came out I never had another problem .

I've just been offered a fresh pair by an Apache guy . He sent me photos that just don't look right . There's evidence of a leak and they've got blue Cal Custom 80's pinstripes which strikes me as odd . Check these photos out please .
Maybe it's just me . Too worried about getting screwed .

I'm looking at these pictures blown up and I'd swear these are IV uppers with V lowers bolted on although looking at the lowers from these photos it's hard to tell what they are exactly .

I enlarged the pictures and it is extremely difficult to tell, as they are so dark, if the upper housing is one of the latest design, #5 housings. The last design #5 upper housing was "smooth" on the side where the 6 stud holes are. The early #5 and all the #4 upper housings were "scalloped " around these stud boss's. A #5 lower case might have a V stamped in it immediately in front of the wear plate area. The true way to tell is separate the upper and lower housings and look at the front verticle shaft. A #4 and early #5's were polygon in shape. A true #5 will have a splined front verticle shaft. Also the spur gears on a #5 are 1" in thickness. Also look at the OD of the trim pin hole in the rear of the upper case. On a #5 it is 1" in comparison to a 7/8" pin for a #3 or #4 drive.
Hope this helps.
Gary Kollofski
612-247-7081

Paul is asking $18k for the pair of #5's he states that they are fresh rebuilds from speed master...

AEX... I have transoms and IIIA's 1:33 ratio, perfect for your cat, cam off of mine, they were fresh with new gear sets... let me know if you wanna talk about them... I'll cut ya a great deal on them

I'm sending my fives to Offshore in Ft Laud for refresh and since they are getting scarce I figure some extra drives may be worth the investment , but I'm not going to buy for junk .
I cracked IV gear cases over the prop shafts several times , this never happened with the V's .
I'm dialed for the V drives on boxes anyway so going to III's would throw everything off .
Thanks for the offer .

What I noticed is they have oil fills on the upper gear case rear cover and I don't think this is right . Either way they probably need rebuilds and aren't worth the asking price imo .

I checked today and was told that if there is a fill port in the rear cap, it is probably a real early #4 drive from the early 80's. A true #5 will not have a fill port on/in the rear cap.
Gary

how much HP were you putting thru the IV's that caused the shafts to break? You have me worried now.

At that time 750 hp totally surfaced on the cat with extn boxes . The lower gear cases developed a crack in the housings vertical trailing edge about 1.5 inch below the cavitation plate after 4-5 races . I switched to fives when they were introduced and then never had another problem with 950 hp in a light 30 footer .

[QUOTE=aex;3617797]At that time 750 hp totally surfaced on the cat with extn boxes . The lower gear cases developed a crack in the housings vertical trailing edge about 1.5 inch below the cavitation plate after 4-5 races . I switched to fives when they were introduced and then never had another problem with 950 hp in a light 30 footer .[/QUOTE

So a V has a stronger case than a IV??

Yes!

I know this is a bit old but I'm curious if IV and V uppers and lowers are interchangeable?

They are not interchangeable . A 4 will bolt onto a 5 gimbal though

[QUOTE=MILD THUNDER;4460484]They are not interchangeable .

Thanks for the clarification. I'm pretty sure the spacers are the same so I'm assuming the bolt patterns are the same? What exactly prevents them from mating up?

The shaft is different. The #4 used a polygon shaped verticle shaft, where the #5 uses a splined shaft.

So the empty cases would probably mate up?

another speedmaster question will a small shaft 4 upper interchange with a 3 drive. the 3 has a fill cap on the back and the 4 doesn't have a cap it has the regular screw fitting.also the the upper gears change the ratio or is it done just in the lowers like the rotation is thanks for any info didn't mean to change the subject

The 4 upper is entirely different than a #3. They dont mate up.

There were two lower gear ratios sets, and many upper ratios, which equated to, alot of available ratios at the time.