Topic: 1966 3.5hp Viking – Antique Outboard Motor Club,Inc

This topic has 10 replies, 6 voices, and was last updated 7 years, 9 months ago by chris-p.

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July 19, 2016 at 9:36 pm #4796
chris-p
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I was brought in a 1966 34601 model Viking 3.5hp to service.

First time with one of these. He even has his original owners manual, owner ID card, parts catalogue and service guide.

For this style air cooled motor, what do you guys find works best for an oil ratio and oil type? Wondering if it will run hot/sluggish on water cooled oil? Original manual says 1/2 pint per gallon.

Manual also says to never put hypoid gear oil in case. Whats up with that?

Should be fairly easy to get running. Had no spark, but quick points clean fixed that. Soaking carb now. No tillotson parts in my inventory, so just going to make what I need for the carb and we will fire her up.
July 19, 2016 at 10:24 pm #40528
frankr
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I believe that would be the West Bend / Chrysler motor, one of the very few air cooled outboards that I show any appreciation for. I actually think they are pretty good, for what they are. It has the old West Bend powerhead that is related to the old Kart engine, but less power and plain bearings, etc. Back when I was racing karts, those durn West Bend kart engines would smoke me and my souped-up Clinton with dual carburetors.

Anyhoo, I would suggest 16:1 and probably chainsaw oil, because they run hotter than water cooled outboards. I don’t understand why they say not to use hypoid oil, when a Sea King version says to use "Wards Sea King Hypoid Outboard Gear Oil" It has stainless steel shafts, and "real" seals, so should be ok. One thing I like is it uses prop thrust to force water up a ram tube to cool the exhaust housing, unlike Eskas and their chintzy water pump.
July 19, 2016 at 10:40 pm #40530
Mumbles
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They probably meant not to use automotive hypoid oil as marine or outboard gear oil is different with less foaming and contains anti corrosion additives.
July 19, 2016 at 10:42 pm #40531
chris-p
Participant
Ok thanks Frank. I was thinking they run pretty hot, and to stick with chainsaw type oil. 16:1 it is.

The hypoid comment through me through a loop as well when I first read it. Says to use a Non corrosive leaded outboard gear oil, EP90, such as Texaco Outboard Gear oil-EP 90 or equivalent. Says in bold "DO NOT USE A CORROSIVE HYPOID GEAR OIL UNDER ANY CIRCUMSTANCES"

I understand now thanks Jim. Did not see the "corrosive" comment before the hypoid, just scanned through it quick like I normally do and assumed it said all hypoid gear oil!
July 20, 2016 at 10:03 am #40553
jerry-ahrens
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I’ve tried both TCW3 and Stihl oil in my air cooled West Bend. I can tell a difference with the air cooled Stihl oil, the powerhead is quieter and idles better with the Stihl oil. I’m sure any good air cooled 2 cycle oil would be fine.
July 20, 2016 at 2:15 pm #40564
cajuncook1
Participant
Chris, Richard’s Viking site has a manual for the Chrysler 3.5hp outboard. You may have it already, but I thought I would post it for you.

http://www.richardlpaquette.ca/Viking%2 … manual.PDF
July 20, 2016 at 9:06 pm #40589
mini-motors
Participant
Definitely 16:1. But the correct oil would be an oil with the rating of TC-3. Harder to find then the TCW-3. But the TC-3 is formulated for air cooled engines, while still rated for marine use.
July 21, 2016 at 11:45 pm #40664
chris-p
Participant
Got her done today, and boy is the owner ever happy. That little thing runs fantastic. So quiet, and idles like a little sewing machine.

Cannot remember though how the choke plate snugs up. It just sort of hangs right now, and will kill the motor when it swings closed. I don’t remember there being a spring on it, anyone have one that could look to see what keeps the choke lever in the OFF position.
July 22, 2016 at 12:20 am #40668
frankr
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10, 11, and 12. Screw, spring and detent

free pic
July 22, 2016 at 12:25 am #40671
chris-p
Participant
Ah ok understand now thanks!

I took that core plug out when I soaked it. Perhaps the detent and spring are in the bottom of my cleaning tank. Thanks Frank. Hopefully I can find it.
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