Old Johnson Sea Horse project **FINISHED**

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Good advice. I'll tear into the tank and see if I can find the problem. I'll post what I find.

Thanks!!

 

[Rick K]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Amen to the "leaving the cap lose"... I use a Yammy 8 as a backup motor, and one time I forgot to loosen the cap. This is on a regular style tank. Brought my boat home, covered it, and went away for a weekend. Came back, and could smell gas from 50 feet away. The heat underneath that cover had actually pressurized the tank to the point where it emptied an almost full tank.

Now my boat had some non-skid surface put on by Starcraft, and nothing short of a bomb could remove it. That outboard gas and yamalube sure did the trick though.....

Lesson learned I guess....

 

[Scaaty]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Can't add much to whats said. I just sold off my last Pressure tank, and on the sitting in the sun, yep on cracking the cap a touch. Every tank I had was bowed out on the bottom from pressure. . On your tank, pull the screws, call laings, order a new gasket, the new pump diaphragm parts, and get some new hose. keep it original. And thats a hellofa 10 buck find!
I also have a good motor side/male twin fitting if ya need one. Had it on ebay, no takers. Email hogrider@myway if you need it. Its the one with prongs, male fitting. Females sell close to 100 new, but ebay has them occasionally

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Thanks to everyone for the great help so far. Also thanks for the offers for the fuel hose parts. You guys are the best. I'd like to made sure this setup will work before I hit you up for the part8)

I took the fuel tank apart and here is what I found.

Does this look right to you guys? The gasket appears to be factory made and it fits perfectly, but there's no hole where the diagram shows there should be. Also the foot on the pickup tube is gone. I don't know if there was a check valve in it or if it was just for support or a filter or what. I don't think it fell off in the tank either. Is that part included in the rebuild kit?

Here is a picture of the pickup tube.

Thanks again for the help. I'm going to place an order to get some needed parts and we'll give this thing a try.

 

[tashasdaddy]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

the foot is a screen (fliter). i also have a complete working tank. super buy for $10.

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

td, email me.

laramide@gmail.com

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Okay, I got my tank fixed. The check valve at the foot of the pickup was missing. Replaced it and it works great. I painted it up and replaced all the gaskets. For the motor, I replaced all the L/U gaskets and seals and replaced the impeller. I replaced the coils, plug wires, condensers, and points. I have a question about adjusting the points. With the flywheel in the proper place, you put the feeler gauge between the points and adjust the eccentric til they read .020. The eccentric screw is a little loose though. Will this cause it to move when the engine is running? It's snug, but not tight.

Next I have to rebuild the carb and then I'll give her a try. Am I missing anything?

 

[Scaaty]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

The eccentric screw if supposed to be loose, as it only adjust the points. The other tightens down to secure the points. .20, and your ready to go. Leave the cowl off, stick it in a barrel, pump the tank, squirt a little Premix in the carb throat from a squirt can or spray bottle, and bet it starts first pull. I can see the smile from here when it does!

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Thanks Scaaty. I already tried hooking the tank up to the carb, but she wouldn't start. I had to try. I haven't done anything to the carb yet though. I'll try the pre-mix! Syncing the carb has me a little worried because my book is pretty vague. I'll probably be hittin' you up for more info soon. Thanks for the reply.

 

[F_R]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

The eccentric screw is just that, a screw with an eccentric head and will be loose in the breaker base slotted hole. Saying that in order to say this: it should be screwed all the way in then backed out enough to allow back and forth movement to adjust the points. But if it is backed out too far, the eccentric head will be above the breaker base and can continue to unscrew all the way out and cause much damage as it gets swept up by the magnets and chews everything asunder. Been there and saw it happen. Ouch!

Torque that flywheel nut to 40-45 ft/lbs

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Thanks FR. I did screw it all the way in first and then back out just enough to get the right gap. I torqued the flywheel nut to 40 lbs. Crossing my fingers. Thanks for the help.

 

[Willyclay]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Cannot emphasize too much the point already made about the potential hazard of these pressurized tanks. I had a really close call many years ago with a bilge full of gas due to a split hose on one and lived to warn other people about it. It's been a while since I've had to do it!

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Willyclay, thanks for the warning. I've got brand new hose on the tank and new clamps on the fittings. Old fittings but they're metal, so I'm not worried about that. All new gaskets and stainless hardware. Here's what she looks like after the upgrades and paint. only thing that's left are decals but I'm not sure I want to spend the extra bucks on them.

 

[F_R]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Tank looks good from here. Just a little trick of the trade: You should drill a 3/32" hole thru the web between the hoses. Then slit the hose up to the hole only. The hole serves as a rip stop to prevent it from tearing off in some direction you don't want it to go.

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Excellent idea FR. I will do that.

 

[Willyclay]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

The tank looks great! Hope you get them both running real soon. Nothing better than the old two-strokes.

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

HELP!!!

Okay, I finally got everything done. BY THE BOOK. Put it in some water and after about 10 or 15 pulls, it fired up and ran. I started the needle adjustment procedure and then it quit, all at once. SIEZED! Can't pull it over. The flywheel still moves (very hard) by hand. I had Plenty of water coming out the exhaust and the engine is only warm to the touch. Fuel is mixed at 24:1 and I know both cylinders were getting fuel. Thinking the fuel tank might be locking it up somehow, I vented the tank, but still no go. Can these things hydrolock? There's no way it could be a water or inadequate oil issue could it? WHAT'S GOING ON!

DR<<<panicking.

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Okay, here's a clue. The engine was running fine and smooth. I put the shifter into forward and it immediately died. The shifter still works and the prop spins freely in neutral. Ideas?

 

[F_R]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

Separate the lower unit from the upper part and see which frees up. Then you will at least have narrowed it down.

 

[Drowned Rat]

Re: Old Johnson Sea Horse fuel question *PHOTO*

Re: Old Johnson Sea Horse fuel question *PHOTO*

FR, what could be binding it up? I can't think of anything as long as the prop spins freely. I greased all the fittings before I put them back. This motor requires you to take the powerhead off to get the lower unit off, so I'm dreading that. But... I'ts got to be something in there.