June 24, 2015 at 4:44 pm #18826
Yes, the shallow divider. Man, I even went to Ken Cook Co. and all there is, is generic manuals.
Topics: 10June 24, 2015 at 4:47 pm #18828
I believe the service bulletin covering the hot leg/paint charring and drilling a water passage to cool it was for the 1955 model year Big Twin/RD motors not the Sportwin/QD. I’m not home so I can’t post that bulletin but I did the update to my ’55 Big Twin so that’s why I remember it. I’ve never seen a "hot shifer" problem on the post ’57 Sportwin/RD models and owned at least a dozen of them, nor do I recall a bulletin on this issue with that series motor. Unfortunately, I think the problem must be elsewhere. Actually a common problem I’ve seen on the Sportwin/QD is water leaking (sometimes profusely!) at the shifter due to wear or a bad O-ring.
US Member - 2 Years
Topics: 29June 24, 2015 at 4:57 pm #18829
So your theory is that due the sloppy shift handle, exhaust is relieving through the sloppy bushing causing the excess heat on the handle? Could be.June 24, 2015 at 5:54 pm #18836
I believe there was a bulletin on an RD overheat problem, I’ll go back and look. If so, I’ll be able to get the number, but won’t be able to read it.
NOPE, a few close, but can’t open/read them.
http://www.fiberglassics.com/library/Ev … _Bulletins
#98 – exh. gas
#152 – new fastwin exh. tube
#408 – 10hp conn. rod
#714 – 1965-66 5hp overheat
#766 – overheat 3, 5 and 6hp
#811 – overheat 1967-68 40hp
Topics: 10June 24, 2015 at 11:24 pm #18853
Here’s a link to the Service Bulletin that I think is what Gary had in mind – as I noted it is for the early 1955 (Mfg late ’54) model year RD/Big Twin not the QD/Sportwin. Link: http://www.oddjobmotors.com/Misc%20Stuf … 20burn.pdf I can’t find anything on a problem with the QDs along these lines.
Regarding the leakage around the handle, yes, my thinking is that if it was worn enough, it’s possible the exhaust heat escaping around the shift handle could heat it up? Not sure what else – I’ve never seen a problem like this. But a 60+ year old motor and many prior owners bodging repairs, who knows….June 24, 2015 at 11:41 pm #18854
Thanks lotec, I guess that wouldn’t apply to a QD since the base of the powerhead is no where near the same. Darn, I thought maybe we had it!
Topics: 29June 25, 2015 at 12:09 am #18855
OK – I have found bulletins from 1946 through 1951 and 1959 through 1971. I don’t know what happened to 1952 through 1958 …
I did not find what I was looking for, but it was entertaining reading through ’59 through ’67. There were pages of stolen motor bulletins that were eliminated as "obsolete". In any case, the statute of limitations has run out so you all can now proudly display your stolen motors.
. . . . . 😀
Canada Member - 2 Years
Topics: 395June 25, 2015 at 3:53 am #18877quote Garry in Tampa:
Does that mean all the motors I have which are missing their, ahem, ID plates? 😯
US Member - 1 Year
Topics: 41June 25, 2015 at 5:25 am #18882
Garry has been around outboards from day one almost. I’m with him thinking we have a design flaw before it was revised, then came the service report to drill an extra hole for cooling. Nothing to go by but my gut feeling is that Garry has it right. I have looked at very many water discharge from around the head with OMC products without any issues with sucking up water from the bottom seal. My Scotts are the same way, very close to the driveshaft area too. It also seems to cool the shift handle water needs to be close enough to get & keep the linkage with a constant flow of water. I too think between both cylinders firing at 180 degrees out from one another the exhaust gasses are forced down the leg for continued cooling. I bet too the late 58s are different than the early ones too.
JeffJune 25, 2015 at 11:32 am #18892
So drill a hole like Mumbles said, back on page 3. Drill it from the water intake side so it will be angled slightly down?
I bet too the late 58s are different than the early ones too.
You know, I have another QD19 mid, I’ll check serial numbers and inspect it for differences from this one. I know the driveshafts are different – one has splines at the bottom, the other has a key/keyway.
US Member - 1 Year
Topics: 57June 25, 2015 at 12:35 pm #18894
A very timely discussion, I too have been looking for the info on drilling the auxiliary cooling hole, haven’t been able to find it yet. All hope lies with Garry to come to the rescue… again!
Topics: 32June 25, 2015 at 1:11 pm #18898
I thought the keyed to splined drive shaft changed in 1960 (QD21 -> QD21S) along with heavier gears.
US Member - 2 Years
Topics: 29June 25, 2015 at 1:37 pm #18901
Yes, at this point, I would go with mumble’s drilling advice. It will be easy enough to plug this hole if the fix does not work out. The only other idea would be to find a different mid section with the longer divider wall between the shift linkage and exhaust cavity, but it would have to be from another 58 model.June 26, 2015 at 10:17 pm #18967
OK, Saturday it gets drilled, right?
You must be logged in to reply to this topic.