Prestolite Points

Does anyone have a part number for the points in Prestolite screw down cap dizzy. (89 SN)

Are the points used in any other Automotive applications?

Trying to source from normal automotive parts store in Australia. I know I can buy from Skidim but the freight to Aus for just points is not justifiable.

I dont want to change to EI would just like to replace points.

Lewy,
Were're slowing down over here on the other side of the world as some of us are going into the winter sleep mode. You on the other hand are the opposite! It just means that you may need to wait awhile before someone who knows the exact point part # checks into the site.

With the distributor part #, did any of your sources over there pull up a points #? It's not a marine specific part.

lewy2001 wrote: No ideas anyone?

Sorry...can't help on the part number but I can give a bit of info on your adjustments. First off, the point gap and dwell setting are really adjusting the same thing. They are just measuring it in different ways, one with a dwell meter (the more accurate of the two), the other with a feeler gauge. Second of all, be sure you do your dwell or point gap adjustment first, then check and adjust your timing. This is important since changing the dwell/point gap will change the timing.

SNob the numbers on the distributor were 7020S 8 M 42 I think this is the model number there is also another number E5JL-12100-CA.

These small numbers are getting harder to read as the years pass may be due for glasses soon.

I did a bit of searching last night and found the following site:-

Prestolite Marine Distributor parts

It shows a model number of IBM 7020S which matches up with one of the numbers on distributor.

Points Part No. 18-5303
Rotor Part No. 18-5403
Condensor No. 18-5340

Tried these part numbers at my local parts place who supplies to the Trade but without success. It appears as that everything here relates back to a Bosch cross reference. He had a book with pictures of all contact set configurations but could not match any of them up with the Prestolite points.



Hopefully you can get another part number that I can try. If possible get a Bosch equivalent number.

Thanks for your offer of help.

I ended setting the points gap to 25thou to get the minimum dwell angle of 29 degrees then had to retard timing back to 10 BTDC.

Thanks for that SNob(Chris)

Will try them numbers today with my parts man.

Our boats are almost twins. I even have the same high pole as yours. I noticed in the brochure that my clour is actually cranberry.

Thanks KENO I should be able to get a cross reference off one of them numbers.

I vaguely remember seeing a Echlin book at my parts guy's shop today. I had no luck with the 392 numbers. I was looking thru all of his books and found some pictures of contact sets in a Champion book. The S85V Champion set looked close it states it is for a Dodge or International truck. I wonder if they used a prestolite dissy.

Took the boat out for water test today. It runs fine up to 3500rpm then runs very rough. I dont think it is ignition related will replace fuel filter and check breather & anti syphon valve. It felt like it was starving for fuel.

I will buy some new Plugs also, unable to source Autolite or Motorcraft and the Champion RBL11Y plug on the engine spec sheet have been replaced by RV12YC plugs. This is a slightly colder plug than the Champion RV15YC4 that are currently in the boat. Do you think a hotter plug will be OK? Probably will spend most of the time around 2-2.5K(20-23mph) Revs boarding with the odd single ski run at around 30mph.

Can get NGK, Denso, Champion and Bosch plugs have read a bit in the archives that some of the cross reference plugs are not quite right for these engines. Should I stay with the Champions?? The NGK cross reference plug was a BR6FS which turned out to be a colder plug than the RV12YC

SNobsessed wrote: Lewy - Can't answer on the plugs but do know that the condenser is not the same for clip down vs. screw down caps.

Not true. I put the same sets of points and condensor in both my Tique (clip down) and Skier (newer screw down) this past summer. The caps are obviously different, not sure about the rotor.

I got a freebie set of points & condensor from a friend who had EI. The condensor wouldn't fit, was backwards. I just reused the old one. The kit was from SkiDim.

Don't know why my experience was different, but this is true in my case.

Maybe it has something to do with my std rotation vs. his RR.

It really was backwards. I remembering pondering how to make it work, but it needed the lead to come out of the opposite end of the can. I doubt if I kept it. I would take a picture of the issue if I had it & the boat here together. It's not enough of an issue to dwell on, but please believe me it would not fit & it wasn't a matter of just bending the lead.

Yep the Echlin number worked CS-720A cross referenced to a Bosch GA-94V. My parts guy ordered them there was only a few sets in the country. Will probably take a couple of days to arrive.

Thanks for your help SNob & KENO. It was stated that they were for Dodge Cars & Trucks, Chrysler cars and Hudson. Not sure of what year & model though.

Bracket is welded on. Sorry, but I am correct on this one

Chris,
I did a tune up on my 4 cyl. Mercruiser last summer and the condenser didn't even come with a bracket. Trying to remove the old one to use, I too thought it was welded on and even looked for spot weld marks! Some work was need to R&R it.

You guys win!

The condenser can be jury rigged by breaking the bracket off (it is spot welded on) & using a different bkt. I myself am going to get the right part.

My original point was there are 2 different condensers in SkiDims kits & I proved that.

Tim - you are on, but no fair breaking the bracket off.

I will PM you for shipping address.

Managed to delve through a few more ignition books at my mates auto store.

Keno you were close:-

Chrysler New Yorker 58-62
Dodge Imperial 58-60
Dodge 65-67 383,413,426
Dodge Truck 58-60
Hudson 56-58

When you tell the auto store employee it is for a boat with a 351W in it you get a blank look at the best.

All they want to know is what car it is out of and what year.

91nautique these boats have Prestolite marine distributors fitted totally different dissy to what we used on 302/351 Windsors out here. But thanks for the thought.