Set Back

[SANTAFE]

How much setback is there built in to a factory Mercury 12 inch Champ mid?

[SANTAFE]

Face of the clamp to the swivel pin? Anybody?

[AlaskaStreamin]

The factory offshore mids have 2 additional inches built into them. Not sure if the champs are the same.

[Onetime]

Only the 15" factory mids have the extra 2" built in. The 20" doesn't.

Not sure on the champ mid. I think has a little more then a 20". You need someone who has both to take a measurement from the transom mount area to centerline of the driveshaft. The champ is so completely different then the 15" and the 20".

[patchesII]

Champ mids are totally different in every way than a regular production mid. Mine is in pieces right now but I'd suspect it has less setback than any of the production mids but that's kind of a guess. It's difficult to say how much setback is built in. About the only thing you can do is measure from the clamp to the swivel pin or something like that

[Onetime]

Try and get a measurement to the driveshaft centerline as that's the only way you can compare them all. The 15" gets the extra 2" in the tilt housing. The extra 2" is between the steering pin and the driveshaft.

[Raceman]

Try and get a measurement to the driveshaft centerline as that's the only way you can compare them all. The 15" gets the extra 2" in the tilt housing. The extra 2" is between the steering pin and the driveshaft.

I'm not sure what you mean by tilt housing, but the extra 2" of setback in the 15" mid is in the swivel bracket. Also, in the case of the champ mids, there are two different setbacks. The old manual up/down mid has less setback than the newer style hydraulic up/down. I have both and can do measurements from the transom mounting surface to the front two powerhead stud holes (which would be just as accurate measuring point as the driveshaft centerline) but won't be back near my hydraulic up/down until tomorrow. I don't have any 15 or 20 inch stuff disassembled for a similar comparative measurement, so you'd be on your own with that. If I recall, a champ mid, even the old style has more setback built in than a standard 20" mid but it's been a long time since I replaced one with the other.

[Onetime]

I'm not sure what you mean by tilt housing, but the extra 2" of setback in the 15" mid is in the swivel bracket.

I have both and can do measurements from the transom mounting surface to the front two powerhead stud holes (which would be just as accurate measuring point as the driveshaft centerline) but won't be back near my hydraulic up/down until tomorrow. .

That's what I meant, just not calling it by the correct part name

A measurement to the powerhead two front studs would give him what he needs.

[SANTAFE]

The reason I am asking is that I am comparing the set back of a factory 12 inch to one of the lite weight 12 inch ones being built. I actually believe the lite ones have more set back.
All info greatly appreciated.

[patchesII]

That question I can answer, the lite weight that's TopGun sells have 4.5" more setback than an S3000 hyd up/down like mine. They can build it with more if you want but the shortest they can get it is +4.5"

[RBT]

That question I can answer, the lite weight that's TopGun sells have 4.5" more setback than an S3000 hyd up/down like mine. They can build it with more if you want but the shortest they can get it is +4.5"

You sure, I thought it was 1.5 inches more than a hydraulic on the transom. Could be wrong.

[Tomanytoys]

Just measured my factory champ mid.
from transom face to front powerhead mounting studs appears to be 8.125" (+/-)

[patchesII]

You sure, I thought it was 1.5 inches more than a hydraulic on the transom. Could be wrong.

I thought I was sure but now you have me questioning myself. Lol

[RBT]

I thought I was sure but now you have me questioning myself. Lol

Ya well I am also second guessing myself. When we ( me and Galen) designed that clamp, I thought that was the number. But that was years ago,I and I certainly could have forgotten. One thing that I did was to move the steering axis and the trim axis as close as possible. This effected the way the motor trimmed. It helped reduce the change in motor height as you move through the trim range

RT

[RBT]

I should clarify, my intent was to keep more prop bite. This effectively is like increasing the setback while keeping the motor weight as far forward as possible.
gen 2 is in development.....