10 HP Seahorse questions

HighTrim

Supreme Mariner
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Jun 21, 2007
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10,486
Re: 10 HP Seahorse questions

Good luck with her.

Gap the plugs to 030, points to 020

24:1 is what I would run.

I was working in London for the last 6 months. You are right in the snow belt there, gonna need that blower!
 

Commando1962

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Nov 20, 2011
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Re: 10 HP Seahorse questions

Mornin' HighTrim,

I made sure to run the OB, before I agreed to the trade to make sure that she ran, the gears engaged smoothly and the impeller worked as it should, and of course that the tilt mechanism all works as it should. It does run smooth. I will be needing to replace the prop or get her repaired , ( I pulled the prop and the hub is in great shape). "Ships Ahoy" near Sparta (St. Thomas) Ontario should be able to help there. The only other main concern is the "High Speed" control knob is missing. I can turn it by the centre collar for now though.

The only iussue that the previous owner said that he had was that after 4-5 hours, it started to run rough. I checked the air cleaner/filter. The canister is there, but no filter or cover is present. Looks like I'll be doing the carb, and making a cover for the airfilter. I checked the plugs, and he was running J6C sparkplugs( the equivelent of j6j in the old days) which are a colder running plug than j8c (j8j). They were slightly fouled, but not that bad that I can't clean, regap and reuse after testing. I'll be checking the thermostat soon. Probably hasn't been cleaned for a while.

When I got her, I also got the fuel line/connectors, and inline primer. The fellow did not have a fuel tank for it though, so I simply took the connector off of the line, dropped it into a regular gas can of 24:1 mixed fuel, and ran her. I know know that the fuel pump is working nice and strong as well, as it had about a 3 ft lift to draw on as well.

Should be fun to get these minor things done over the winter, tune her up in the spring, and do some boating and fishing.

If you know of any folks near me who might have some old parts around, let me know please.

Thanks,,

Doug
 

HighTrim

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Jun 21, 2007
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10,486
Re: 10 HP Seahorse questions

I will be going out to London again at the end of next week. Let me look around my parts motors for the things that you need. I do not have the knob that you need, but have a ton of tanks and probably props as well. But will have to check on the prop.

The "air cleaner" is actually just a silencer. No filter there. Are you missing the top half of it?

After running 4 to 5 hours???? Where the heck were they boating! LOL
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: 10 HP Seahorse questions

Check the coils. You may have a bad one. Remove the hand starter and the inspection plate is right there on top of the flywheel. Four screws secure the tear drop shape inspection cover. If the coils are cracked, then you'll want to replace them.
 

rolmops

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Feb 24, 2002
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5,751
Re: 10 HP Seahorse questions

Weird, I have the original flyer for the '61 and there's no ring on top... I wonder which one is wrong?

The '59 and the '60 had the ring on top.The '61 did not
 

Commando1962

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Nov 20, 2011
Messages
11
Re: 10 HP Seahorse questions

Thanks Zephyr,

I plan on doing a complete tune up over the next few months; Points/Condensor/Plugs/Wires etc. If it needs new coils it wil get them. I won't be starting to rebuild her until after the Holidays though.
 

kfa4303

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Sep 17, 2010
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6,094
Re: 10 HP Seahorse questions

The '59 and the '60 had the ring on top.The '61 did not

yup. my '61 had a straight chrome strip down the center of the cowl rather than the round, chrome ring on the '59-'60 models.
 

Commando1962

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Nov 20, 2011
Messages
11
Re: 10 HP Seahorse questions

Steve,

It took a while. but I finally got all of the black paint off of the VIN plate. Serial # 276554 Model QD 20. So, is this a 1961?
 

kfa4303

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Sep 17, 2010
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Re: 10 HP Seahorse questions

Nope that's a '59. My '61 was a QD-22, so if you subtract 2 from the model number you get QD-20, which also correlates to the '59 model year. This link gives a chart for dating your motor and should help you give it a complete tune up. Great old motors, about the only weak spot are the clutch dogs which can/do wear out over times.

http://www.sschapterpsa.com/ramblings/johnson_QD.htm
 

1946Zephyr

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Oct 21, 2008
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Re: 10 HP Seahorse questions

QD-20 is a 1959. Tuning it up will be a good afternoon project and won't take long. Maybe an hour or two.
 
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