1966 Merc 110 9.8 Hp Condensers!!

[jaystersj]

1966 Merc 110 9.9 Hp Condensers!!

The carb was rebuilt. Not just cleaned. My friend got the kit and did that and the fuel pump.

 

[jaystersj]

Hey Guys,, I recently picked up a 1966 Merc 110 9.8 hp .. It was hardly running when I got it. I've changed one coil, as it had no spark! The carb has been rebuilt, also the same as the fuel pump, new spark plugs also.. The problem i'm having is that it bogs down when accelerating , and it almost sputters, it sounds like it wants to rev up with no problem, except for the sputtering almost like a misfire . The points are good and cleaned. I've been trying to find new condensers for it ( 398-2203) but they are discontinued. Seirra 18-5212. Is there another possible condenser that can be used in this model?? THanks for any help

 

[MTboatguy]

iBoats carries them in their online store:

http://www.iboats.com/Condenser-Sierra/dm/view_id.174573

 

[gm280]

jaystersj, I'm not so sure the condenser(s) are the problem. Because condensers (actually capacitors) are merely there to help keep the points form arching. So unless the condenser(s) is/are shorted, I don't think that is your initial problem. If you have a good meter, you can actually test the condenser(s) and see if they are good or not. But you have to use a special multi-meter with a capacitor scale to verify them. I read that the carb has been rebuilt. Does that mean cleaned and a new kit installed or merely spraying some carb spray on it or through it. I think your carb is the suspect myself. You have to remove everything in those carbs and clean and verify every little hole and slot is cleared and clean. It doesn't take but one little speck of dirt to screw the entire carb up from running and functioning properly. So I would buy a carb kit, remove yours and disassembly the entire carb, every little part and clean it again. And you can take one wire out of a stranded wire and use that to push through the holes and slots to make certain they are clean and clear. Try that and post back. I think it will solve your problem. JMHO!

 

[MTboatguy]

This thread has been posted twice now, as I said, if that is what you need, iboats carries them in their online store:

http://www.iboats.com/Condenser-Sier...view_id.174573

As far as your symptoms, it sounds like a fuel problem, in the high speed jet area on your motor, I just completely did my 67 9.8hp and ended up buying a rebuilt carb and put on it, cleared the problem right up.

 

[jaystersj]

Sorry for the double post, I fixed that. As for the carb, it was done with a rebuild kit that my friend, who is familiar with boat motors did for me. The guy I got it from couldn't get it to run properly , I figured out that first off, it had a bad coil, with no spark! It was a replacement coil that was burnt out cause the original coil has the part number on it, that has now been superseded by another number. The working coil has the original part number on it still. SO if it was a bad condenser could that not cause a bad coil? Also the guy had the Air/ fuel mixture screw all the way out, I put it back in and is just around 2 and a bit out now. The other thing I noticed while testing for spark was that it would run fairly smooth on just the lower cylinder. Then switch it to the top cylinder only it would stumble and act like a misfire. Tomorrow I Might switch the two condensers around and see if reverses this. I don't want to sink a lot of money into this! My friends coming over possibly Weds with a timing light to see if its in sync, ! Since who knows who has worked on it before. And those condensers are NOT available on here, they are discontinued as it says on your link MT. Is there another possible Condenser I could put in this?

 

[MTboatguy]

Did you contact them to make sure they don't have them in stock? Also, there are many other sources for these parts on the internet, MaxRules, Boats(dot)net, you just need to refine your search skills, I bought them about 4 months ago from Maxrules.

 

[jaystersj]

On Maxrule the part is NLA.

 

[MTboatguy]

What is the serial number on this motor, I have found another part number for a condenser in a tune up kit that should work, but need to know the serial number of your motor.

One of my books says that the Sierra 18-5206 will work on these motors.

 

[jaystersj]

I actually picked up 2 today. Hoping to put them in tomorrow.

 

[MTboatguy]

I actually picked up 2 today. Hoping to put them in tomorrow.

Good, glad you found some.

 

[jaystersj]

Got them in,, tested it, still seems like it has a bit of a studder to it while revving up. I posted a vid on youtube when I was testing it .

 

[MTboatguy]

If it still has a stutter, then it is in the fuel system, check the filter to make sure it is clean, mine looked like it was covered with mud when I changed my carb out. That said, the only way to really test it, is get out on the lake and see what you have, test tanks do not subject the engine to loads like riding around in the lake does.

 

[jaystersj]

Agreed. I'm doing that this weekend. Seems like it chokes out alittle on acceleration, And smokes more till the engine can burn it off.. I'm gonna see if I can find some plug wires for it too. don't think its that thou. I have 2 weeks off after this week so it should run fine by then. I do think its timing or fuel related cause you can see the fuel in that hose that is on the side of the motor.

 

[MTboatguy]

Have you pulled the plugs and checked them? Check for build up on them as well as making sure the gap is correct, if you don't have a gap tool, a credit card is the right thickness on this motor for setting the gap.

 

[jaystersj]

Theres no build up on them,, I actually picked up a gap tool today and set them to .25. They were both wet and clean

 

[MTboatguy]

The gap on that motor is .30, not .25

 

[jaystersj]

I read it was .25, but i'll try it tomorrow. I have to head to work,, boo! Thanks thou. Appreciate any help

 

[jaystersj]

I changed the gap, same thing. Is the carb in this model a KB8A? And I read in this stupid online manual that on this model the timing is not adjustable, do you know if that is correct? Thanks

 

[MTboatguy]

There were several versions of the KB series carbs that were used through the years on the Model 110. The way you adjust the low speed jet on it has been pretty well outlined on various threads on here, it is simple but a little tedious. As far as timing, there is really only one correct setting and it should be stamped or be on a sticker on the top of the flywheel, when you put the new condensers in, did you check the point gap?

With that said, I am still leaning to a fuel problem or an air leak at the carb. I would suspect that maybe the carb to block gasket it damaged or the carb is not properly tightened down, so I would check that. One other thing to take a look at, is the screen on the fuel pick up in the tank, it might be partially blocked also, I have had that problem in the past.

Did you download the .pdf files from Max on the KB series carb and take a look through it? If not, I have copies of them in .pdf format I could email to you, if you want them, let me know in a private message with your email address and I can send them to you.