1952 Lauson Sportking S-351 Need some info

This topic has 9 replies, 4 voices, and was last updated 3 years, 9 months ago by jcrigan.

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March 4, 2019 at 11:33 pm #170351
Eric McNett
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Need some insight, lauson mod#S351 52 3hp. Would like some guidance on maintenance, parts acquisition etc. Any literature greatly appreciated!

What Grade oil to use in crankcase and what spark plugs? Are there carb kits available Tillotson MT6A?

Eric McNett
Seattle AOMCI Member
March 5, 2019 at 10:41 am #170363
Buccaneer
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US Member - 1 Year (includes $3 online payment fee)
I have a pdf owners / parts manual .
If you like, PM me your email address
and I’ll send it to you.

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March 5, 2019 at 11:13 am #170365
Eric McNett
Participant
PM Sent, thank you!

Eric McNett
Seattle AOMCI Member
March 5, 2019 at 1:46 pm #170375
Buccaneer
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US Member - 1 Year (includes $3 online payment fee)
Eric, I sent you a PM back

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March 6, 2019 at 11:31 pm #170481
Eric McNett
Participant
So I see the manual says SAE 30 oil, but doesnt say how much oil to add? What is the capacity of this engine, do i fill it up to the bottom of the threads on the fill plug?

Eric McNett
Seattle AOMCI Member
March 7, 2019 at 4:31 am #170491
jcrigan
Participant
Yes, up to the fill plug. That would be about 20 ounces. The spark plug would be a Champion J8J or J8C. Plug gap is 0.030″ and points are 0.020″. Use a non detergent oil. Check that manual on how to set the timing. As the points wear on these the timing changes.
March 7, 2019 at 8:51 am #170501
Buccaneer
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US Member - 1 Year (includes $3 online payment fee)
Timing, in case I didn’t send you that page.

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March 9, 2019 at 12:36 pm #170666
Eric McNett
Participant
Says i need to remove the cyli der head to correctly check timing, will this be a make my own gasket engine or are they available still?

Eric McNett
Seattle AOMCI Member
July 13, 2020 at 5:09 pm #208518
mcclurski
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US Member - 1 Year (includes $3 online payment fee)
I have a couple of these as well. keep me posted

jwmcclure
July 14, 2020 at 2:49 am #208571
jcrigan
Participant
The later heads on these are 8 bolts. The older motors are 6 bolts. Something to think about when you find a supply of these head gaskets. Have always reused the old head gasket.
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