Driveshafts...

[AusOB_Collector]

Hi All

As mentioned in my thread regarding my AD, when I purchased it, the only thing missing was the driveshaft.

I was wandering if anyone could provide a length and inside measurements square for a standard length AD 102 driveshaft?
Even just the length would be greatly beneficial.

Cheers
BP

[AusAnzani]

This is not an essential part Boyd. Just place the outboard in fast flowing water and the prop will turn regardless

[Hugz]

This is off a 102 TD (I think)

Can someone advise if this is the same configuration as an AD?

And which part comes off next? I always thought the square shaft goes through the rotor but appears to reduce to a circular rod. KEH???

[Hugz]

I was wandering if anyone could provide a length and inside measurements square for a standard length AD 102 driveshaft?

Wouldn't the internal be the same measurement as the square drive at the bottom of your crankshaft?

[AusAnzani]

As it's already apart, I'll take some photos of the drives and input shafts of my AD102 and post them up over the weekend.

[AusOB_Collector]

Hugz

yes the internal measurements will be the same either end; don't know why I didn't think of that.
Would you be so kind as to measuring the length of the driveshaft so I can cut one to size please?

Thanks and Cheers
BP

[Collector Inspector]

When cut to length there will be some grinding inside.

Modern availability of square section tube in AU will require that.

Easy.

B

[Hugz]

Length of the square section is 18 7/16"

I note the square head waterpump and bevel drive are somewhat different to the 102's.

Still would like to see some pics of box disassembled.

[Charles uk]

The drive shaft was cyanide hardened at both ends to prevent twisting & locking in place happening.

We haven't be able to source any square section tube of a suitable size here in the UK, let us know if you find any.

Though British Seagull or John might be able to lay their hands on a longer one that you could cut to size, if the ends of the one you find have been hardened, you'll have to cut with an angle grinder as a hacksaw will really struggle.

Your quite lucky in having your pump impeller on the pinion shaft as it means you can use 2 x 3 inch sections of drive shaft welded to a suitable length of round bar, quite a few like that over here, just make sure it's perfectly straight!

[Collector Inspector]

"Your quite lucky in having your pump impeller on the pinion shaft as it means you can use 2 x 3 inch sections of drive shaft welded to a suitable length of round bar, quite a few like that over here, just make sure it's perfectly straight!"

That as well BP.

BnC

[Shearwater]

The drive shaft was cyanide hardened at both ends to prevent twisting & locking in place happening.
Though British Seagull or John might be able to lay their hands on a longer one that you could cut to size, if the ends of the one you find have been hardened, you'll have to cut with an angle grinder as a hacksaw will really struggle.

Are all Seagull drive shafts hardened at both ends?

[Charles uk]

It doesn't seem like all the early ones were, but after circa 1970 all the 102 cc models seem to have been, but don't take this as a researched fact, I only know about the ones I've tried shorten.

To be sure try the end with a hacksaw, if it's a job to scratch it, it's been hardened!

It seems this was part of Seagull's continual improvement program, when a problem occurs, fix it, the first step in this with the drive shafts, was why they increased the drive shaft wall thickness in the late 40's.