Super Seahorse 35 Help?

[ErieRiverRunner08]

First Post and first time boat owner!
Not sure a hole lot about the boat.I was told its a 1962 johnson outboard. Motor says is a Super Seahorse 35. Back says 40.5 cu inch displ
Found a picture. Im sure thats it except mines been painted a bit to match a color change. not by myself.

The motor tag is gone not sure what model or serial number.Any help appreciated! Very Happy about first boat

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

the welsh plug says 35524 11132

 

[jay_merrill]

Re: Super Seahorse 35 Help?

Looks like an RDS-20, which is a 1958 Johnson Super Seahorse. Look for a data plate on the front of the motor, under the steering yoke, to see if the model number is the RDS-20.

If this is what you have, PM with an email addy and I'll send you a PDF of an original owners manual for this outboard.

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

Thanks for response!
I think the plate is missing thts why I looked at the welsh plug. Is there something else I can look for?

 

[jay_merrill]

Re: Super Seahorse 35 Help?

Not really. There are some folks sround here that are pretty good at identifying motors by the serial number, and one of them will probably post fairly soon.

I see a PM in my welcome window, which is probably you - I'll send you the PDF in a minute.


PS: PDF sent. BTW, determining model year by welch plug serial numbers may or may not reveal accurate info - if the powerhead was ever swapped with one of a different year, you will just end up knowing what year the powerhead is. On the other hand, if it matches the year that the rest of the motor appears to be, especially if it has original paint and that matches the paint on the interior of the cowl, it will provide reliable info.

 

[tashasdaddy]

Re: Super Seahorse 35 Help?

think this is a true JohnnyRude. 35524 is a 1961 40hp evinrude, powerhead.

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

JohnnyRude? sorry not following.... yes looks like the head and vslve covers have been partially painted over but the original underneath all seem to match..

 

[freddyray21]

Re: Super Seahorse 35 Help?

johnnyrude = motor made out of combined parts from Johnson and Evinrude parts (serial numbers) Johson powerhead evinrude lower those kind of things. Just sold an Evingale recently. Evinrude except for the lu of of a Gale made for Spiegal.

 

[jay_merrill]

Re: Super Seahorse 35 Help?

You apparently have an Evinrude powerhead on your '58 Johnson. This is very common, as is installation of powerheads of different years.

Other than a reduction in the value of the motor to collectors of 100% stock, antique motors, this is of no consequence. Johnson and Evinrude are to OMC what Chevy, GMC, Buick and Pontiac are to General Motors - other than trim pieces the motors and vehicles are the same.

 

[CATransplant]

Re: Super Seahorse 35 Help?

It's pretty simple, really. You have the engine block, at least, from a 1960 Evinrude 40hp mounted on the midsection and lower unit of a 1958 Johnson RDS-20 35 hp.

So, for internal engine parts, you'll need stuff from the Evinrude model. I can't say for sure on the carburetor, but the rest is the same. Coils, flywheels, etc. The flywheel nut on yours requires a higher torque setting than would the 1958. Other than the carb and the flywheel torque, though, pretty much everything else is the same between the two.

The cylinder heads on the RDS-20 were different, too, and still had the compression relief valves. If those aren't there, then it has the heads from the Evinrude. That's probably the case.

So, do you have a 40hp or a 35hp? That's going to depend on the carburetor. If it's the one from the 40, then you have a 40hp outboard. If it's the one from the 35 hp, it's a 35hp. Not much difference in performance.

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

what is the torque specs I picked up pretty much everything I need today.... points, wires, coils, gear lube, impeler

 

[steelespike]

Re: Super Seahorse 35 Help?

flyweheel nut 100 -105 ft lbs.

 

[lucky7]

Re: Super Seahorse 35 Help?

dont mess up the flywheel nut or key, use some pb60 and a puller,
take a pic before you dissassemble stuff for reference,

 

[tashasdaddy]

Re: Super Seahorse 35 Help?

you need a harmonic balance puller, 3 Grade 8 harden bolts, i think they are 1/4x 20, but not sure. to go into the flywheel to pull it. standard bolts will strip off in the flywheel.

 

[larky]

Re: Super Seahorse 35 Help?

before reassembly clean the crankshaft taper well, and scuff it with some sand paper just a little.

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

thanks Ill keep you posted.. again thanks for the help

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

Ok Update...
Ive done all upper end work: fuel pump, carb rebuild, new plugs wires, coils resistors, points, fuel lines and overall clean up

Motor Not Firing....
Has Spark, Fuel, And Compresion..... Motor Turns Very Slowly... Cables Hooked Directly To Block And Starter..... Not Battery

Starter Was Smokeing... Think It Might Be Fried

Any Ideas?

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

BUMP.... still need help on this..... starter starts @ 120.00 dont want to replace if not needed

 

[ErieRiverRunner08]

Re: Super Seahorse 35 Help?

before reassembly clean the crankshaft taper well, and scuff it with some sand paper just a little.

WHY? I DIDNT DO THIS

 

[jimmbo]

Re: Super Seahorse 35 Help?

It's pretty simple, really. You have the engine block, at least, from a 1960 Evinrude 40hp mounted on the midsection and lower unit of a 1958 Johnson RDS-20 35 hp.

So, for internal engine parts, you'll need stuff from the Evinrude model. I can't say for sure on the carburetor, but the rest is the same. Coils, flywheels, etc. The flywheel nut on yours requires a higher torque setting than would the 1958. Other than the carb and the flywheel torque, though, pretty much everything else is the same between the two.

The cylinder heads on the RDS-20 were different, too, and still had the compression relief valves. If those aren't there, then it has the heads from the Evinrude. That's probably the case.

So, do you have a 40hp or a 35hp? That's going to depend on the carburetor. If it's the one from the 40, then you have a 40hp outboard. If it's the one from the 35 hp, it's a 35hp. Not much difference in performance.

Since the 35hp has a dispalcement of 40.5 cubic inches while the 40hp usaes a 43.9 ci. block and the bores are different there shouldn't be much concern as to which heads are on it. The 40hp used the compression relief starter thur the 1961 model. As for carb, If the 35 uses a carb with a smaller venturi than the 40 hp carb, using the smaller carb on the 40 will reduce the top end a bit but it will still put out more than 35 hp. It would have better bottem end.