Author Topic: mac 10 oil pump gasket updated model  (Read 480 times)

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Offline pete

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mac 10 oil pump gasket updated model
« on: June 28, 2017, 07:13:39 am »
Have any fellow collectors out there got any NOS updated 10 series oil pump gaskets for sale The ones I am talking about seem to be made of rubber or similar compound i have found some on ebay at 13 dollars au which is fine but I balked at the 30 dollars au for postage I sent the seller a message asking about postage but did not get a reply. I have 2 promac 850s which are sucking bar oil into the cylinders causing hydralock. I have dug through some parts saws and found the updated spring clip that was used with these single screw oil pumps but would like to upgrade the gaskets, thanks if anyone can help

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Offline Cut4fun .

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Re: mac 10 oil pump gasket updated model
« Reply #1 on: June 28, 2017, 01:08:41 pm »
Link to what you are needing? I dont know macs to know if I find the right gasket you are looking for.
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Offline Al Smith

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Re: mac 10 oil pump gasket updated model
« Reply #3 on: June 29, 2017, 06:20:15 am »
I'm not certain if all 10 series use the same gasket .If memory serves for example the 700 and the 850 pumps are slightly different . I'll look up the numbers when I get time .
However it might not be the gasket as those pumps have a tendency to pass oil into the crankcase as they age .Most it's just a little puff of white smoke on a start up .Others it might develop  into a hydra lock
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Offline Cut4fun .

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Re: mac 10 oil pump gasket updated model
« Reply #4 on: June 29, 2017, 03:57:36 pm »
http://www.ebay.com.au/itm/Mcculloch-Chainsaw-Oil-Pump-Diaphragm-Gasket-92818-NOS-10-Series/122422508425?_trksid=p2481888.c100675.m4236&_trkparms=aid%3D111001%26algo%3DREC.SEED%26a
I'm not certain if all 10 series use the same gasket .If memory serves for example the 700 and the 850 pumps are slightly different . I'll look up the numbers when I get time .
However it might not be the gasket as those pumps have a tendency to pass oil into the crankcase as they age .Most it's just a little puff of white smoke on a start up .Others it might develop  into a hydra lock

See what Al comes up with then we can look at them Pete. 

Those are listed in about 6 places. Sure you cant find some closer?
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Offline Al Smith

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Re: mac 10 oil pump gasket updated model
« Reply #5 on: June 29, 2017, 04:09:16 pm »
You need part number 92818 pump seal(gasket)  for 10-10A Sp 81,800 805 Sp 850 and 850 super .The 700 might be the same but it showed a different part number . BTW I've shipped stuff to Oz .A few years back by US Airmail a small package was 4 dollars US and took 4 days to get there .Going from OZ to Ohio it was 7 dollars  Australian money .
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Offline pete

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Re: mac 10 oil pump gasket updated model
« Reply #6 on: June 30, 2017, 06:19:34 am »
will look around for a few more days locally but so far no luck when i pulled one of the 850s down still had the paper gasket had not had the upgrade fitted and the leak had lead to visible scoring on the piston and a carbon deposit in the exhaust port. I have found a couple of old saws that have the upgrade kit which is a piece of spring steel that puts pressure on the pump in these 1 bolt pumps so would like to get a couple or so of the later rubber style gasket

Offline Nixon

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Re: mac 10 oil pump gasket updated model
« Reply #7 on: June 30, 2017, 03:57:46 pm »
I can check with an aquaintence for you . I know that he has got a lot of nos mcculloch stuff . I'm certain that he has complete oil pump kits . Let me know . He can be a bit hard to approach ,so it may take a while . But ,I did just locate a carb rebuild kit for his 797 ,and gave it to him . So, I think he'll be fairly easy to deal with :) .
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Offline pete

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Re: mac 10 oil pump gasket updated model
« Reply #8 on: July 01, 2017, 07:43:32 am »
It's only the updated gasket that I am after according to an old post of Mc Bobs that I found the 850s received an update kit which was a rbber gasket and a spring steel piece I have a couple of the steel bits from parts saws
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Offline Nixon

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Re: mac 10 oil pump gasket updated model
« Reply #9 on: July 01, 2017, 09:04:37 am »
I'll see if he has just the updated gaskets by themselves . Might take a week ,or two to get an answer from him .
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