68 sportwin 9.5 running issues.

[Brokenrod]

Hello everyone. My friend has a 1968 Evinrude sportwin 9.5. The motor has about 2 hours of use in the past 10 yrs, and unknown use before that. The engine still looks new and shiny under the hood.
Before we attempted to run it for the first time, checked compression 70psi, both cylinders, we changed the water pump impeller, changed lower unit oil, replaced spark plugs (J4C), replaced fuel lines, cleaned the carb- which looked brand new once we separated the 2 halves. cleaned the screen fuel filter, and added a clear inline fuel filter.
The motor ran great in the test barrel 3 times, but when we put the motor on the boat it ran great for about 10 min, but as soon as it was put in neutral, the engine started to miss and die out, it would not rev up at all. we tried pumping the ball a little, but that just seems to kill the motor instantly. pulled and replaced plugs again, and cleaned carb again- to no avail.
We pulled the flywheel last night to check the points. one set of points is mushroomed a little but both sets are pretty pitted up, both sets are at about .018 - i know it should be .020. we are going to replace the points, but do you think this could be a major factor in why its running like it is? im lookin for some trouble shooting help, as i dont want to just start replacing parts and hope i change the right one. thanks in advance.

 

[oldcatamount]

Re: 68 sportwin 9.5 running issues.

new points and condensers will surley help you. check the coils for cracks while your in there. Compression seems a little low but will probably increase with a little use. You could try some "Sea Foam" in the gas tank too. Look for dried out, cracked gas lines all the way back to the tank.

 

[Cofe]

Re: 68 sportwin 9.5 running issues.

Did you replace the float valve needle with a rubber tipped one that comes in some kits? If you did, put the old needle valve back in. The new rubber tipped needles do not work very well.

Yes, and check the coils as suggested.

 

[ezeke]

Re: 68 sportwin 9.5 running issues.

The starters are geared to make starting easier, so 70 PSI is not as bad as it sounds. You can probably turn it faster and get a higher reading with a rope around the flywheel, but 70 is OK using the starter.

Be sure to use the clip that connects the float arm to the float valve needle. Also check that the gasket between the fuel pump and the engine is airtight.

Unless the fuel filter that you are using is specifically designed for outboards using premix, you would be better off to remove it; inline auto fuel filters are too dense for the pump.

 

[Brokenrod]

Re: 68 sportwin 9.5 running issues.

There is no clip securing the needle to the float. the float tang has a shiny spot where the needle is contacting, but no clip. there doesn't seem to be anywhere for the clip to go, so im not sure this model even has one. It does have the rubber tipped needle, and i polished the mating orifice in the seat with a qtip and metal polish.
I didn't know about the fuel filters not working with premix, i will definitely pull the filter and replace with something suitable.
I visually inspected the coils and they look great, almost new- no hairline cracks. i'll check them with the volt meter later tonight for resistance.

 

[ezeke]

Re: 68 sportwin 9.5 running issues.

Repair kits have had the clips and appropriate needles for over 25 years. If you keep relying completely on 1968 literature, you will have other issues. There are no aftermarket kits for the 9.5 carburetors. The newer BRP kits have the correct needles.

 

[Cofe]

Re: 68 sportwin 9.5 running issues.

I'll be darned, the 68 carb doesn't show a spring clip.....

 

[ezeke]

Re: 68 sportwin 9.5 running issues.

I'll be darned, the 68 carb doesn't show a spring clip.....

Of course that diagram is not a 9.5 carburetor, but

Just as I said, keep relying on 1968 literature.......

 

[Brokenrod]

Re: 68 sportwin 9.5 running issues.

here is the carb. part number 69. no clip shown

http://www.boats.net/parts/search/BRP/EVINRUDE/1968/9822E%201968/CARBURETOR%20GROUP/parts.html

 

[Cofe]

Re: 68 sportwin 9.5 running issues.

Ok thanks, I was looking at the 10hp.:redface:

Ezeke says "the kits from BRP have right needles and clips for 25 years now."

As I have learned from my errors, FR and Ezeke are right.

 

[ezeke]

Re: 68 sportwin 9.5 running issues.

If you just want to upgrade an older needle and seat, order part #0396521 for the three piece kit.

 

[Rick.]

Re: 68 sportwin 9.5 running issues.

Do put in a new kit. You won't be sorry. I have noticed the point gap and point cleanliness on my 9.5 is crucial. Your on the right track. You said you pulled your plugs but didn't report their condition. Wet or dry? I'm thinking wet but would like to know. Best of luck. Rick.

 

[Brokenrod]

Re: 68 sportwin 9.5 running issues.

First of all, Thank You everyone, for your help so far! plugs were wet. bottom plug was a little dirtier with each set. they actually looked a little rich. this carb only has the rich- lean knob, and i read on the internet 2 different settings for it anywhere from 3/4 turn out to 1 1/2 turn out. we were set at 1 turn out while it ran.

edit: I will add them to the list of things to buy.

 

[BigB9000]

Re: 68 sportwin 9.5 running issues.

Repair kits have had the clips and appropriate needles for over 25 years. If you keep relying completely on 1968 literature, you will have other issues. There are no aftermarket kits for the 9.5 carburetors. The newer BRP kits have the correct needles.

Of course that diagram is not a 9.5 carburetor, but

Just as I said, keep relying on 1968 literature.......

Do put in a new kit. You won't be sorry.

Did you miss these posts the first time around?

 

[rolmops]

Re: 68 sportwin 9.5 running issues.

Your problem might be very simple to solve.
I suspect that the low speed needle vibrated loose as you had it running,thereby making a far too rich mixture.
Check it and if it loosened up you may want to put a cork or leather washer in there to make sure that it stays in place the next time you run it.

 

[Brokenrod]

Re: 68 sportwin 9.5 running issues.

No BigB i did not miss those posts. i wrote that i will put the kit on my list of things to buy. Again, Thanks for the help.