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Nov 21, 2012, 09:56 AM
Registered User
bogbeagle,

Yes, the rebate is what made me wonder about the o-ring. Thanks for the info.
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Nov 23, 2012, 02:42 PM
Chuck it and see!
Wing-span's Avatar
Is there a post showing picture of a FA-80 being stripped down? perhaps showing the push rod covers being removed and indeed the gears at the bottom of the pushrods?

I can't seem to find anything, before I go ahead and strip my motor.
Nov 23, 2012, 11:58 PM
Registered User
Reginald's Avatar
Quote:
Originally Posted by Wing-span
Is there a post showing picture of a FA-80 being stripped down? perhaps showing the push rod covers being removed and indeed the gears at the bottom of the pushrods?

I can't seem to find anything, before I go ahead and strip my motor.
Special tool: just use an appropriate drill to steady the camshaft
Nov 24, 2012, 01:28 PM
Hutch
hutchinstuff's Avatar
Hey guys, got the rebuild for the 72 almost done, wondering what the little slim AL washer does? It fits on the crank at the front bearing, does it go between the bearing and prop flange?
thanks
Nov 24, 2012, 02:17 PM
Chuck it and see!
Wing-span's Avatar
Thank you Reginald,

You went to a lot of trouble!

I'll certainly have a read through that.
Nov 24, 2012, 04:36 PM
Registered User
Howdy Hutch you sure its not the washer that goes on the intake pipe at the cylinder head ? Cheers the pope
Nov 24, 2012, 11:52 PM
Hutch
hutchinstuff's Avatar
thanks pope! I finally figured it out on my own. She runs like never before! smooth operation with boca bearings.
Nov 28, 2012, 09:55 AM
Registered User
mike early's Avatar
Quote:
Originally Posted by Reginald
Special tool: just use an appropriate drill to steady the camshaft
What an interesting book. Where'd you find it?
Nov 28, 2012, 10:24 AM
Registered User
The PIPE's Avatar

HERE is where those pages came from...


Dear Mike Early:

The PIPE Here, a firmly avowed FOUR-STROKE fan in New England USA...

...and as I've got a copy of the very same book those scanned pages came from in Reginald's post from last weekend, you CAN still order it from the publisher for USD $7.95 before postage.

Hope this helps a small bit...

Yours Sincerely,

The PIPE....!!
Nov 28, 2012, 10:29 AM
Registered User
mike early's Avatar
excellent, thanks man!
Nov 28, 2012, 10:34 AM
Registered User
mike early's Avatar
do any of you fellows know anything about old saito 4-strokes that did not use rings?

I am rebuilding a 90T Mk1 engine and was surprised to find that although it has a shallow groove in the piston, there is no ring.
Nov 28, 2012, 11:50 AM
Dieselized User
gkamysz's Avatar
I think that groove was used to help scrap oil into the crankcase. Enya and Saito produced ABC ringless four strokes in the early days. OS did it not too long ago with the FL-70.

Greg
Dec 06, 2012, 12:21 AM
TEAM BOCA
jeffie8696's Avatar
I understand the FL70 was a flop. Could it be that the ringless design did not allow enough oil to the crankcase? Personally I like to see a lot of oil for the internals, I have a 180 here that was oil starved and it is worn out inside.
Dec 06, 2012, 04:03 AM
Registered User
DarZeelon's Avatar
Mike,


It is an oil-groove...but most are hair-line thin and the one your piston has seems very wide...
It looks like about 0.6 mm.
Dec 06, 2012, 01:43 PM
Living in the south of France
paulinfrance's Avatar
Quote:
Originally Posted by gkamysz
I think that groove was used to help scrap oil into the crankcase. Enya and Saito produced ABC ringless four strokes in the early days. OS did it not too long ago with the FL-70.

Greg
There is one OS .70 in my club and it just doesn't seem to run regularly,,,,


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