1957 Evinrude Fastwin 18HP Hopeful Resurrection

[nwcove]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

you might want to look into a reseal kit for the lower unit, and while you have the power head off, replace the shift lever oring.

 

[HighTrim]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

If you definately have to change the coils, I would not bother re using the plug wire. Get new stuff, its only a few bucks.

I dont know if you already have new gaskets for the drain and vent screw when you do the gearcase oil or not?

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

you might want to look into a reseal kit for the lower unit, and while you have the power head off, replace the shift lever oring.

The oil looks very good and I wasn't planning on breaking it open. I did look for some parts, the upper lower seal part #302513 is shown as NLA. Is there a number for the seal kit? I'm also not pulling the power head unless I have to, so far I'm good.

If you definately have to change the coils, I would not bother re using the plug wire. Get new stuff, its only a few bucks.

I dont know if you already have new gaskets for the drain and vent screw when you do the gearcase oil or not?

I was looking at wires, is the 7MM the right stuff, $.70 per foot is cheap. The gaskets #27X284 for the drain and vent popped up as NLA.

Thanks for the ideas, keeping me thinking.

 

[HighTrim]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

The gaskets are definately available. Your local dealer will have a million of them.

 

[tosoutherncars]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Are you removing the powerhead? If the motor looks like it has been run a fair bit (and I would assume it has, in fifty-odd years) I might be tempted to remove the exhaust cover and get some of the carbon build-up out. Clean up the exhaust plate, two new gaskets... lets you have a peek at the rings too. But not strictly necessary, of course...

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Are you removing the powerhead? If the motor looks like it has been run a fair bit (and I would assume it has, in fifty-odd years) I might be tempted to remove the exhaust cover and get some of the carbon build-up out. Clean up the exhaust plate, two new gaskets... lets you have a peek at the rings too. But not strictly necessary, of course...

tsc - I'm going to leave the power head on for right now, I'll be doing the Seafoam clean out after she's up and running. I might want the carbon to keep the old holes plugged up.

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

I've been working on my boat and ignoring my motor for a while. I was looking at my transom and measured it 16" measured on the face, 15.5" if measured at 90 degrees to the floor.

The Fastwin has what appears to be 18" to the cavitation plate.

I'm 2.5 to 3" low from what I figure. I took pics but can't upload them until I find my cable.

I was looking at maybe making a jack plate to raise it up. Would it make a difference for a 14' tinny and an 18hp motor.

The other thought was to find a short shaft leg. There is a CL listing with a Johnson, the guy says it's an 18 short shaft, thinks it's about a '72. The plate is missing but the number on the plug that he read was J2405753. He has bifocals and uses a magnifying glass like me.

This number doesn't reference anything that I can find. Can anyone tell me if this number is correct and what motor/year it references?

As a note my CD 16 also measures 18".

Finally put together some spare change and hope to order parts tomorrow

 

[kfa4303]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Hi 64osby. Yeah the "long" and "short" shaft designations can be a little confusing. You do have a "short shaft" motor inasmuch as it does not have the leg extension. However, it is around 18" rather than the moderns standard of about 15" for a short shaft. I have the same problem with my '66 20 hp. It's sort of too long to be a short shaft, but too short to be a long shaft. There are only about three things you can do that I know of: 1.) Add a few inches of material to the transom a lot of work and, not much use if you get a modern, 15" "short shaft motor" down the line 2.) get a jack plate (kinda pricey depending on what it's made of) 3.) clamp the motor a little higher on the transom. The motor doesn't actually have to rest/hang from its clamp off the back of the boat, so long as the motor is clamped tightly enough the transom it should be fine and you can raise the motor about 1"-2" in the process. I would be sure you have a safety chain just to be safe. I've done this on my 14' tinny and it seems to be fine. It's not a perfect solution perhaps, but the price is right (i.e. $0).

 

[tosoutherncars]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

How far underwater would your anti-cavitation plate be? As I understand it, the only downside to running 'deep' is a bit of power loss (Short of having it sooo far down that you have to worry about water ingress and that type of thing.) And I suppose you may need to adjust your stop pin to have it *slightly* more trimmed out, to avoid porpoising.

That said, I would hope that a standard 18 HP, 18" should be able to cope just fine with pushing a 14' tinnie without a jackplate, even if it is running a couple of inches lower than optimal?

 

[1946Zephyr]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

A good water level is where your lower shock mounts are. You definately want it above the waterpump area.

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

kfa, tsc and 46Z, Thanks for looking at this.

Here's a few pics of the motor resting on the top of the transom.



I haven't put the boat in the water so I don't know the where the water line will be. To me it looks like it could come up about 2".

I was working on the transom and thought it would be a great time to add any mods or maybe a homemade jack plate.

 

[kfa4303]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Hi 64. Yeah, that looks just like my situation. I noticed that in the second pic you might be able to get the cavitation plate to sit a bit more level by tilting/trimming the motor out one position (mine seems to run best on the second position out from the bottom:/ ), but you'll still be a little short. Raising it that last 2" may not make a huge difference one way or the other, but ideally the cavitation plate should be level, or slightly higher than the bottom of the boat to reduce drag. If you don't mind the work a jack plate is probably the best way to go. You can leave the original transom intact, which should save you from having to do any major surgery. There are all kins of designs out there. Most involve thick pieces of channel aluminum. Keep in mind, that adding a jack plate that hangs off of the back of the transom will essentially have the effect of lengthening the boat. So if the plate protrudes 1' of the back of your 14' boat, it will handle as if it were, in fact a 15'. Probably not noticeable on such a small boat and motor, but it can make a difference on larger craft. You'd like it to be adjustable, I suppose, so check out some designs for sailboat kicker motor mounts. They end to be relatively small, highly adjustable and easy to find and should work for motors up to about 18-20 hp, but not much more. Keep us posted.

 

[kfa4303]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Here's one you can buy for $130 (not to bad really), but I'm sure you could make your own, for much less. You could probably get a guy at a sheet metal shop to build the bracket for under $50 and you could use some epoxied wood rather than the large rubber pad as a mount. This is probably what I'd go with, but there are tons of designs out there. Check the forms here and at Duckworks.com. They have tons of DIY stuff for boats, mostly sailing, but lots of motor boat stuff too, and they have insanely cheap prices on lots of parts and materials.

http://www.***************.com/p/GAR-71057/

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

kfa, the link didn't work, but I found the product. That's more of a kicker or sailboat aux bracket. I would be looking at a jack plate setup. I have lots of Alum. scrap to work with.

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

I've been working on my boat and ignoring my engine. Took the boat to be welded and started playing with the motor again.

I was reading Bwana Don's CD 12 thread and he mentioned low compression. It reminded me to check mine. Turns out I was very low, 25 ish with two different plug style testers. Tried the PB Blaster trick that was discussed in Don's thread and it didn't help.

Off came the head and gasket, very easy. Didn't have to pull the motor.

I'm glad it was pulled, it was shot. I could see where the PB Blaster was seeping through to the cooling side.

Ill be ordering a new gasket. I was a day late and a dollar short, I had just ordered my other parts last night.

Big thanks to all who post on these threads, great info and you help make life a little easier.

 

[HighTrim]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Be sure to dress the head while it is off.

By dressing, you need a piece of glass, or something very straight, like a mirror. Lay in on a table, then place a piece of emory cloth of suitable size on it. I tape it down to keep it in the correct spot. Then run the head in a figure 8 pattern on it, frequently checking it to see when it is true. You will be able to tell from the way that it is wearing if it is straight yet.

 

[HighTrim]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

When re installing the head, proper torque and torque sequence is VERY important.

Torque is 96-120 inch/lbs. Start in the center, then work your way outwards in a spiral pattern. Start with half torque, for a full sequence, then 3/4 torque, then finally torquing to full value. The sequence is important as well to ensure proper even fit.

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Be sure to dress the head while it is off.

When re installing the head, proper torque and torque sequence is VERY important.

HighTrim - Thanks for the information. Awesome as usual. Is a sealant recommended or is this a dry fit?

Why did I but a manual when you guys are around.

 

[HighTrim]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

No sealant required. The new head gaskets are shiny and do not require it.

Not a problem, would hate to see you invest in a new head gasket only to have it fail due to a warped head. Your head may be fine, but better to find out BEFORE you reinstall it and there is trouble.

If your torque wrench is in ft/lbs, that is 8 to 10 ft/lbs

9....10
5.....6
1.....2
4.....3
8.....7

Imagine each number is a bolt, that is the type of pattern I was referring to, starting in the middle and sprialling outwards.

 

[64osby]

Re: 1957 Evinrude Fastwin 18HP Hopeful Resurrection

Makes perfect sense, I've done a few auto engines and a few mowers, have a couple torque wrenches.

I don't think the head is warped but there is a lot of contamination (for lack of a better term) on the mating surfaces, and some pitting.