1989 Ski Nautique 2001 carb and electrical issues.

[Taylormoto]

Hello fellow boaters. I am brand new to the Nautique game and I picked up a 1989 Ski Nautique 2001 with the 351W. I just have a couple questions for the pro's. To start I pulled off the air cleaner to find the carb is nasty. I need help figuring out what Holley carb this is because it really needs to be rebuilt. So also, looking for a carb rebuild kit and where to buy it. I also am not getting any spark. I will be checking the hot wire on the coil tonight. If that doesn't work I will bypass the voltage regulator to see if I get spark then. If this doesn't work and the coil is bad again I don't know where to get parts. Remember please I am a rookie when it comes to boats. I know my way around a wrench and a fluke meter. I also am looking at picking up a new cap rotor and points. Once again, I have no idea where to find these parts. I know its reverse rotation but can I pick up a normal 351w cap and rotor? I plan on upgrading ignition but want to just get everything going. One more question is where do I find an impeller for this thing? I have attached pics for everything I am asking about and any info is greatly appreciated.

[shag]

Just call these guys and get a new or rebuilt one from them. They know all about carbs and jetting specifically for these boats. If you are going to go about it yourself, be sure you get a MARINE RENEW KIT. A regular renew kit doesn't have all the gaskets and such that a marine carb has.

http://www.nationalcarburetors.com

[Csb801]

A great resource for parts will be Discount Inboard Marine.
Www.skidim.com


CSB

[funkster]

The carb is a Holley 4160. Like Csb801 said, skidim will have all your parts. Vehicle parts don't always match up, I would stick with marine grade replacements.

As far as the spark, start easy and work your way back. It most likely is something simple but could be anything from an ignition to a resistor. http://www.skidim.com/IGNITION-RESIS...tinfo/R119001/

[CincinnatiCC]

Your best source of info for a boat of this age will be CorrectCraftFan.com.

[homer12]

Be careful with National Carburetors. I've heard some mixed reviews with them, but cant quite remember. Do your research I've got a good contact for you from another forum that has done good work rebuilding carbs if you want to PM me. If you're not familiar with carbs I'd be careful doing it yourself. The skidim.com is a good resource for parts as well as nautiqueparts.com.


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[Taylormoto]

The carb is a Holley 4160. Like Csb801 said, skidim will have all your parts. Vehicle parts don't always match up, I would stick with marine grade replacements.

As far as the spark, start easy and work your way back. It most likely is something simple but could be anything from an ignition to a resistor. http://www.skidim.com/IGNITION-RESIS...tinfo/R119001/

Thank you for the response. I have ordered the carb rebuild kit and the ignition resistor from the site suggested. I had already tested everything else and once bypassed I have great spark. The carb doesn't seem any different then any other truck carb in a rebuild aspect so diving into this doesn't scare me one bit. I do motorcycle carbs monthly on my groups bikes. I was a mechanic at a large Moto dealership for years. Unless you can see some crazy reason or mainly specialty tools required I'm qualified. Thanks again for all the help.


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[shag]

I have purchased two carbs from National and had very good experiences, and anytime I have called them they were very knowledgeable. Just my .02

[funkster]

Thank you for the response. I have ordered the carb rebuild kit and the ignition resistor from the site suggested. I had already tested everything else and once bypassed I have great spark. The carb doesn't seem any different then any other truck carb in a rebuild aspect so diving into this doesn't scare me one bit. I do motorcycle carbs monthly on my groups bikes. I was a mechanic at a large Moto dealership for years. Unless you can see some crazy reason or mainly specialty tools required I'm qualified. Thanks again for all the help.


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Awesome! I have a 87' that I've spent some time "under the hood on" restoring it. I have found that simplicity is the answer to most problems on these models. I made the switch over to electric ignition years ago and it is a night and day difference. I would recommend this high on the priority list. If you have any other questions, feel free to ask. Like I've said, I have basically rebuilt my 87' from the stringers up. Its to bad the 2001 website is no more, that was a great source of info on these boats.

The 2001 models are some fun boats to own and operate. I've had mine up for sale on and off for the last 6 months and I find myself purposely taking the add down because she's almost like family...

[Taylormoto]

Awesome! I have a 87' that I've spent some time "under the hood on" restoring it. I have found that simplicity is the answer to most problems on these models. I made the switch over to electric ignition years ago and it is a night and day difference. I would recommend this high on the priority list. If you have any other questions, feel free to ask. Like I've said, I have basically rebuilt my 87' from the stringers up. Its to bad the 2001 website is no more, that was a great source of info on these boats.

The 2001 models are some fun boats to own and operate. I've had mine up for sale on and off for the last 6 months and I find myself purposely taking the add down because she's almost like family...

Been doing the same. I already did the stringers and the floor. This pic is how she looks now. I'm gonna wet sand and buff this week.



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[funkster]

Nice boat, here is my 87'.

[NautiqueJeff]

Once rebuilt, you'll need to readjust the idle air mixture screws on the side of each bowl. To do this, you need to use a vacuum gauge to measure full manifold vacuum, and adjust the screws so that maximum vacuum is reached while at idle in gear. This is kind of a pain on this particular carburetor because this carb doesn't seem to have a full manifold vacuum port. Most Holley 4160 carbs have the vacuum port that you need located just under the bowl on the primary side, but the PCM Holley 4160 carbs (at least the 75009 4160 on my '98) do not have that port! It looks like yours doesn't have it either, from what I can see in your pictures. In order to get a full manifold vacuum reading, you will have to tap into the PCV hose, which is a pain. Without getting the vacuum reading, setting the idle air mixture properly will be very difficult, and can easily result in difficult starting (especially when engine is hot), hesitation, and other issues.

[homer12]

X2 on going to electronic ignition. Nice reliable upgrade. I did a pertronix swap in my distributor on the old MC 351. Very easy to do as well.


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[alalor1]

Be verly careful jumping over the resistor, you could burn your original coil, though it looks like the coil has internal resistor, so you shouldn't have a resistor in your system. I bought Australian distributors with the coil built in and had no more problems. Before I would fight with the points and condensers, etc. I changed a couple to electronic, but then I found the ones on ebay and they were cheaper than the conversion kits and put out much higher voltage, which allowed me to increase the gap on the spark plugs and gave better combustion.
I would not buy a rebuild kit yet, most likely all you need to do it take it apart, clean it and put it back together, same with the fuel filter. Don't disassemble the fuel pump though! You can get the gaskets really cheap at your local car parts store.

[Taylormoto]

Once rebuilt, you'll need to readjust the idle air mixture screws on the side of each bowl. To do this, you need to use a vacuum gauge to measure full manifold vacuum, and adjust the screws so that maximum vacuum is reached while at idle in gear. This is kind of a pain on this particular carburetor because this carb doesn't seem to have a full manifold vacuum port. Most Holley 4160 carbs have the vacuum port that you need located just under the bowl on the primary side, but the PCM Holley 4160 carbs (at least the 75009 4160 on my '98) do not have that port! It looks like yours doesn't have it either, from what I can see in your pictures. In order to get a full manifold vacuum reading, you will have to tap into the PCV hose, which is a pain. Without getting the vacuum reading, setting the idle air mixture properly will be very difficult, and can easily result in difficult starting (especially when engine is hot), hesitation, and other issues.

The reason I need to pull the carb apart is it is leaking fuel from the float bowl balance tube and that's the only problem. Will I need to rebalance them if all I need to do is change the one o-ring?


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