Golden Jubilee Evi Sportwin 10 - Should I convert?

Crosbyman · Mar 28, 2025

where would you put nylon inserts ???
just mount the plate over the bypass cover using tad longer bolts as you see fit.

the pump is reverse bolted with bolt head between the bypass cover and the plate with the threads sticking out the 2 mounting hole locations.

If one bolt head interferes with the cover plate just off-set pumps plate location so you can have one bolt installed on the outer edge of the plate
(not in the bypass cover cavity)

see post#6 "pump on plate" off-set a bit

install the gasket on the plate & bolt everything up with small star washers to secure the nuts on the face of the pump.

make certain the bypass cover plate's drilled out "pulse hole" and plate pulse hole line up (not overly critical)

LaqueRatt · Mar 29, 2025

Got it. Thanks. I appreciate the help.

LaqueRatt · Apr 5, 2025

Fuel pump installed. Now on to the ignition system.

Crosbyman · Apr 5, 2025

nice job! you can reorient the fuel pump cover 90 degrees down to shorted the hose and free up some space

up to you

racerone · Apr 5, 2025

I believe you may find an arrow ( factory pump ) that must point up.-----If this is a pump from amazon ( hooflungdung ) then i do not know.

LaqueRatt · Apr 6, 2025

Thanks for the tip and I'm sure you're right. I've seen that before. Pretty sure no arrow on this one. Think it's actually hongkongphooey brand. Same as last one I bought which worked fine. Sure hope it's on right. Guess I'll know if no gas comes out.

LaqueRatt · Apr 21, 2025

Done with the ignition. Got really good spark. As long as the pump does what it should she should start.

LaqueRatt · Tuesday at 12:32 PM

Well she started up on the 4th pull. Not too bad. Seemed to run OK at first, then started sneezing. Tried to adj it out, but ran out of room on the knob. Took the linkage off so could adjust the actual jet and now it just doesn't want to idle no matter what and it seems down on power. After a bit of fiddling she wouldn't start anymore, even though it had been coming to life with one easy tug. Always something.

Pulled the plugs, fouled. Cleaned them up, went to put them back in and I'll be damned if the top plug hole isn't stripped out! Never had this happen before and no, I didn't use an impact to reinstall the plug. I know they make something called a helicoil for this, but like I said I've never had to deal with it. Any tips would be appreciated. Also, guess I can't do this without pulling the part (is it the head?) that the plug goes in right?

Crosbyman · Tuesday at 3:13 PM

you will need to pull the cyl head and install a helicoil using the proper kit. use full metal inserts not the spring looking type. use some red lock-tite

kit comes with a proper size drill tap and inserts

did it on a 7.5 and all good.

LaqueRatt · Thursday at 9:52 AM

Is that easier and cheaper than replacing the head? Guess I'm going to need a new gasket if I pull the head? If I want to replace the head must it come off a similar vintage 10HP?

racerone · Thursday at 10:10 AM

The helicoil can be installed without removing the cylinder head.----Most small engine shops ( if you still have one ) can do this simple job.

racerone · Thursday at 10:50 AM

The 1959 to 1963 model 10 HP use the same cylinder head.

Crosbyman · Thursday at 5:26 PM

racerone said:
The helicoil can be installed without removing the cylinder head.----Most small engine shops ( if you still have one ) can do this simple job.

surely yet $$$$ on this oldy for an hour's labor ($100-125) OP could by a gasket and helicoil kit. as a first time job . keeping shavings out of the cyl would require grease and practice.

JimS123 · Thursday at 5:28 PM

racerone said:
There is nothing wrong with the pressurized fuel tank concept.

I was going to say that ^^^^ was the correct answer. But since I see it is already too late I'll say it anyway.

Pressurized thanks are readily available. EBay, OB meets, etc. I have 4 of them and 2 I got out of the garbage. For 20 bucks you can buy a rebuild kit with gaskets and seals and it will perform like the original. I would venture to say that once you add the pump, hoses and new disconnect fittings it will cost more.

Regardless, this is an iconic motor and is worth more in its unmolested form. The Golden Jubilee is worth more than most other years.

LaqueRatt · Thursday at 6:57 PM

One time I tapped out an oil pan on a Kawasaki when the plug stripped out. I used grease to catch the shavings. Guess this would be kind of like that? Think I'd rather remove the head if it's just a few bolts. Can I reuse the gasket?

I looked for a pressure tank and found only one and I'd have had to buy another motor to get it. Figure even if I got one cheap, I'd still need a hose kit which must be what? $75 or more these days? I hated to convert it, but figure it would be easy enough to convert it back. That sure is a nice 18 Jim. Yours? Fastwin, isn't it?

JimS123 · 2025-05-02T08:53:31-0600

LaqueRatt said:
One time I tapped out an oil pan on a Kawasaki when the plug stripped out. I used grease to catch the shavings. Guess this would be kind of like that? Think I'd rather remove the head if it's just a few bolts. Can I reuse the gasket?

I looked for a pressure tank and found only one and I'd have had to buy another motor to get it. Figure even if I got one cheap, I'd still need a hose kit which must be what? $75 or more these days? I hated to convert it, but figure it would be easy enough to convert it back. That sure is a nice 18 Jim. Yours? Fastwin, isn't it?

I googled it yesterday and found one for 50 bucks. I know Laing's Outboards has a whole stack of used tanks, but I don't know what he charges. The tank rebuild kit is 20 bucks. Hose is about 4 bucks a foot.

Yes, it's a '59 Fastwin. I got it about 15 years ago, and it came with both the regular and suitcase tanks. $20 at a garage sale for all 3 parts.

Golden Jubilee Evi Sportwin 10 - Should I convert?

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