Interchange for 293.5 motor

Miller Motorsports · Post by **Miller Motorsports** » Sat Dec 13, 2008 1:30 pm

I have a 79 Citation 300 that runs but has weak spark on the right lung. I was told by the girl at Total Recreation the local ski doo / yamaha scap yard that there is a swap I can do to get it to run on a cdi box from a newer sled. I am told that the points are behind the flywheel and I am there fore uneasy about the whole process of removing the flywheel. Does anyone know how tough this really is to clean and check the points? Does the Flywheel have to come off? I have checked the coils and wiring in the black box under the carb it looks good and the connections are clean. I have the same resistance off the two coils so they are okay it think. Anyone know?

Attachments:

JDT · Post by **JDT** » Sat Dec 13, 2008 4:16 pm

There are three nuts around the starter drive hub that have to be removed. They take an 11mm socket (weird).

With the hub removed you have a access window in the flysweel that allows you to clean and adjust the points.

---------------

If you need to remove the flywheel than a large socket is required to take off the nut on the flywheel. And a puller is required to break it loose.

Miller Motorsports · Post by **Miller Motorsports** » Sun Dec 14, 2008 1:03 am

Thanks Todd any idea how much gap is req'd I am a post points generation x'r ... I had an old 68 impala with points but it never saw the road... Rotten to the door handles... Canadian car eh'

JDT · Post by **JDT** » Sun Dec 14, 2008 12:03 pm

.016-018 should do the trick.

Miller Motorsports · Post by **Miller Motorsports** » Sun Dec 14, 2008 7:48 pm

Okay thanks man I appreciate it and cdi boxes

Miller Motorsports · Post by **Miller Motorsports** » Tue Dec 16, 2008 6:58 pm

I did what you said and the flippin thing stopped making any spark period. I am lost does that mean the condensor is fried? I opened it the first time and moved it apart 18 thousandths. Subsequently I got no spark at all what so ever. I cleaned the points and that area with brake cleaner aerosol. I took everything back apart and moved the points back to where they seemed to be when I started and got some spark back but it isn't a bright full spark. I am about to take this motor out and swap it for the 377 safari motor I have here. I am waiting on the parts for my spitfire and the sportfire was stolen I am watching all the guys around here snowmobiling and suffering withdrawl symptoms... LOL Jm

JDT · Post by **JDT** » Tue Dec 16, 2008 11:34 pm

You should file the points some. Brake cleaner will remove the grease and dirt but do nothing for pitting and corrosion. To clean use compressed air or electric contact cleaner.

Miller Motorsports · Post by **Miller Motorsports** » Thu Dec 18, 2008 12:04 am

Hey Todd I was doing the process wrong so tomorrow I will put it at top dead centre first.

Miller Motorsports · Post by **Miller Motorsports** » Wed Dec 31, 2008 3:59 pm

I still have not got this piece of ski poop running any ideas fellas?

JDT · Post by **JDT** » Wed Dec 31, 2008 10:39 pm

Where are you at on spark? only one side, none or both but one side week?

Miller Motorsports · Post by **Miller Motorsports** » Sat Feb 07, 2009 12:56 am

I have weak spark on the right lung and average spark on the left. I will start but won't stay running ... I have no experience with the points thing just theory for its operation. Ether runs it best so I assume it burns easier. Carbs clean fuel pump works plugs are new wires are good ohms resistance says the coils are okay... Has to be points right?

Post by **ICCSF 108** » Sat Feb 07, 2009 4:12 am

Starting fluid also works to clean dirt or oil from points & drys clean, not so sure brake cleaner wouldn't leave some sort of film on them??

Kenny

Post by **ICCSF 108** » Sat Feb 07, 2009 4:19 am

Keep in mind that when you adjust the points you are changing the timing, but that would have nothing to do with weak spark.. when adjusting points you have to turn the motor over to adjust each contact at each time the cam opens them..
Also it's best to file the points at the closed position so you have Max spring tension on them while filing..

Kenny

Miller Motorsports · Post by **Miller Motorsports** » Wed Mar 25, 2009 9:41 pm

I still have the thing in my garage fellas not running any more ideas?