302 distributor help
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2492
Printed Date: November-23-2024 at 7:43am
Topic: 302 distributor help
Posted By: Guests
Subject: 302 distributor help
Date Posted: September-23-2005 at 6:12pm
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Can anyone tell me the difference between a 302 distributor and a 351 distributor? I know the oil pump shaft size on the 302 is 1/4" and I think the 351 is a 5/16" but is there anything else? For instance shaft length below the intake? I'm trying to upgrade my 78 Nautique with a 302 to a HEI and my new distributor won't fit. My oil pump shaft seems to be a 5/16"
I would appriciate any help I can get... |
Replies:
Posted By: mackwrench
Date Posted: September-23-2005 at 6:41pm
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This may sound obovius, but look at the ends of both... are there any differances? ------------- NO LONGER A MEMBER |
Posted By: Guests
Date Posted: September-23-2005 at 8:01pm
| The gears can be different as well. lay the distributors side by side and compare the two for length and dia. If the number of teeth and direction of the gears are the same you maybe able to swap gears so that the oil pump interface is good. |
Posted By: Guests
Date Posted: September-23-2005 at 9:52pm
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Just to clear up some confusion...
I only have a 302 distributor. The HEI 302 replacement that I purchased looks identical to my original except for the slot for the oil pump shaft is smaller. Before I have the company send me one for a 351 I just wondered if there were any other reasons why it wouldn't fit? I didn't know if the 351 might be a longer shaft or something. |
Posted By: Guests
Date Posted: September-24-2005 at 1:05am
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I'm a little confused, you have two 302 dist's and they have different drive slots for the oil pump. I have a question. Is the dist in the front (ford) or rear (chevy) of the intake? My 351w has a 5/16 hex as the drive shaft for the oil pump, chevy uses a slot. Since it sounds like you have bought a new dist. I would recommend sending it back and getting the correct one, now if it is used then that's another story and we can get you headed in the right direction and make what you have work if you are handy and with a little more info.
It could be as simple as driving out the roll pin that holds the grear in place and swaping gears. On some models the slot is part of the gear on others it's the tip of the shaft and that will take a little more work and a new set of prestolite bearings in the base to make it work. So I need more info to help you. Oh if you are worried don't be, I have a very strong background with dist. concidering I designed them for GM for several years. |
Posted By: Guests
Date Posted: September-24-2005 at 1:58am
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As much as I wish this was a Chevy, it's not. It's a Ford. I'll try my best to clear this up a bit. I have the original points distributor for my 78 302 that appears to have a 5/16 hex hole for the oil pump shaft. The distributor has some slop in the shaft so I would like to replace it with an electronic HEI distributor. My new HEI distributor (for a ford 302) has a 1/4" hex slot and does not fit my oil pump shaft(obviously). When compared, the original distributor oil pump socket looks to be a 1/16 larger than my new distributor (which adds up). When I called the company I bought it from (off ebay) they were very helpful in wanting to get me the right part. The guy said 302's have a 1/4" and 351's have 5/16" and he's never seen a 302 with a 5/16" oil pump shaft. Now being a marine engine did they put a beefier oil pump in it? And are the physical characteristics of the 302 and 351 Ford distributors the same with the exception of the size of the hex socket for the oil pump shaft? The company wants to make sure and send me the CORRECT replacement part. I'm just trying to find out what that is.
Thanks for your help. |
Posted By: Guests
Date Posted: September-24-2005 at 12:12pm
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My suggestion would be that all you need to do is swap gears. Since it is a hex then it should be part of the gear and not the shaft. look at the gear and you should see a roll pin and a pimple on the gear. the pimple will line up with the tip of the rotor so don't get it 180 degress out off wack. Take a punch and drive out the pin just enought to clear the shaft but not completely out of the gear. It doesn't take a lot of force a hammer will work fine no need for a press, just support the base close to the gear. Slide off the gear and replace with the old gear using the same technique and re-install the gear on the new dist. You can use a punch to line up the holes then tap on the roll pin to start it and the punch will slide out of the way as you drive in the pin. Make sure the roll pin is recessed on both sides of the gear it cannot protrude on either side or you will destroy internal parts.
Now the only issue you may have is that since the HEI you have is a slot like a screw driver, typically that style is the end of the shaft and you will not be able to swap the gears in this case. Look aat the end of the gear and determind if the slot is part of the gear or the shaft. Usually they are different colors one flat black (gear) and the other stainless steel (shaft) if this is the case then you will have to send the dist back and get another, but if the slot is the same color as the gear then you can swap them. What is the name of the company on EBAY? you do relize that ford Never made an HEI dist and that it is a GM product you are trying to match up thus the slot verse hex. GM uses a slot on almost all of there dist. Mallory does make a direct replacement electronic dist for this motor. Hope this helps someand you get it sorted out and are on the water soon. |
Posted By: Guests
Date Posted: September-24-2005 at 12:29pm
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Let me ask you another question? Does the new distributor have a vaccum advance on it? If it does then you have the wrong dist and it will NEVER work. I looked at EBAY and the only ford HEI units are for automotive applications and you will NEVER get this dist to work on your boat. The blocks are the same put thats the only thing that is. The dist for a car and boat rotate in the same direction but the cams do not and the gears are different as well so there is no way in hell you are going to get to correct dist for your engine. Now if the stock motor has been replaced and you have a left hand prop then thats different, but YOU SHOULD NOT USE AN AUTOMOTIVE DISTRIBUTOR IN A BOAT BECAUSE IT DOES NOT HAVE ANY FLAME ARRESTORS OR SPARK PROTECTION AND YOU WILL BLOW YOUR SELF AND ANYONE WITH YOU. So if you are trying to kill your self knock your self out just tell us where you boat and what it looks like so the rest of us can keep a safe distance from your POS.
Now if you would like the correct MARINE HEI unit for your boat then there is a place to buy it but it will cost you close to $400 after shipping unstead of the $150 your trying to get by with. |
Posted By: Guests
Date Posted: September-24-2005 at 8:55pm
| well, that wasn't very nice... |
Posted By: Guests
Date Posted: September-24-2005 at 10:19pm
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Just stating fact's,
it's pretty obvious that you are trying to use an automotive part on a marine application and you won't get it to work. It's pretty obvious that you don't care to do the job right Now if you would like the source of the correct parts this forum can lead you to the promissed land. Their are several owners that have HEI units on their ford engines and they are all marine HEI units that are not purchased off ebay. People on this forum take there beloved CORRECT CRAFT's seriously and would rather buy it from you and perserve it properly then let you trash it, no matter how bad of shape it is in. If you like to half ass things and are cheap then I would suggest selling it and getting a MasterCraft, Malibu or Supra to trash they do don't hold the value or have the following CORRECT CRAFT has or a forum like this or Planetnautique to help maintain these beauties. Try and find another forum half has good as this one for any other brand off boat. Good luck becuase you won't find it beacuse they do not exist. You have first time owners, owners of multiple CC's, owners that have raced boats, owners that can repair anything on the boat that can teach you how to do it right. You even have CC employeed mechanics and owners that personally know the MELON FAMILY (creator/gods) and have had input on the design of CORRECT CRAFT BOATS. please do not insult us by using automotive parts when you have to use marine parts. If it's not the carb, dist, alt. , starter or piston's then use any automotive part you can find but if it is then use the correct parts and buck up and pay the maoney to do so. Hasn't anyone told you what BOAT stands for? Brake Out Another Thousand. |
Posted By: stang72
Date Posted: September-24-2005 at 10:36pm
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tjackle...welcome to the forum!
Nuatique 79...take it easy on him... He gets a bit miffed when guys are trying to throw auto parts on a fine machine! His advice could save you some time and money...go to the source and purchase the recommended part!Use the right marine parts and you will be on the water runnin well! Try using the skidim link on this site and ask for vince! ------------- stang Face plants are not that funny when it's you face! http://www.correctcraftfan.com/diaries/images/3720/photo1.jpg" rel="nofollow - The Super Air |
Posted By: Guests
Date Posted: September-24-2005 at 11:59pm
| I get a little starcastic it just gets old with the guys that try and use car parts on a boat. They are different for a reason. I know there are tons of people that use the wrong stuff on their boats, they work but not for long and they are a major safety issue, Marine parts are more expensive because they have built-in protection for fire suppression and corrosion. it's not like you can pull over and get out and survive in 100 feet of water for very long unless you wear a life jacket all of the time which most don't. On a boat if if it does go up in flames odds are you will not have time to get your life jacket on and you will be a nice meal for the fish. |
Posted By: jbear
Date Posted: September-25-2005 at 1:03am
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tjackle; I second the welcome to our site...you'll love it here...don't mind 79...he gets a bit serious at times but he knows of what he speaks....he only wants things done properly and safetly...jbear ------------- "Loud pipes save lives" AdamT sez "I'm Canadian and a beaver lover myself"... |
Posted By: 73skier
Date Posted: September-25-2005 at 5:31pm
they do sell marine dis. at napa auto parts. I got one there a mallory marine model.I also wouldn't put auto parts in my boat. thats a little know how not many know. thay won't tell you but you have to ask call the main store in greensboro,nc lots of old hard to find pcm parts and cheaper 
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Posted By: gigem75
Date Posted: November-12-2005 at 3:33pm
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"If it's not the carb, dist, alt. , starter or piston's then use any automotive part you can find but if it is then use the correct parts and buck up and pay the maoney to do so. Hasn't anyone told you what BOAT stands for? Brake Out Another Thousand."
So does that mean we can use an automotive oil pump? since the dist' rotates the same way as an automotive dist, then I assume the oil pummp rotates the same way? I am NOT trying to get out cheaper on our rebuild, I just want the correct oil pump. btw, I think you meant "Break out another thousand" not "Brake out another thousand" :) |
Posted By: woodyelc
Date Posted: November-15-2005 at 11:11am
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THE EASY WAY TO FIND WEATHER YOU HAVE A 302 OR 351 IS TO MEASURE ACROSS THE TOP OF THE INTAKE 302 IS 9INCHS BOLT TO BOLT WHILE A 351 IS 11 INCHS. VERY SIMPLE. ------------- woodyelc |