• To ALL forum users - As of late I have been getting quite a few private messages with questions about build ups here on the forum, or tech questions about your personal project. While I appreciate the interest, sending me a private message about these topics distracts from, and undermines the purpose of having a forum here. During the day I wear many hats as a small business owner-operator and I work tirelessly to provide the absolute best service possible to you, our valued customer. When I created this forum I rounded up some of the best minds I knew so that any tech question you might have could be asked and answered by either myself or one of my highly experienced moderators, this way the next time this same question is asked the answer can be easily found and utilized by the next IH enthusiast having the same question. This allows me the freedom to run the day to day operations of the business and minimize the impact to shipments and shop activities that these distractions can cause. It is of the up most importance for me to complete the daily tasks in order to best take care of you our customer, all the while providing you a forum to get the level advice and input you have come to expect and deserve from the premier IH shop in the country.

    So with that I ask that anyone with a question about one of our build ups or a general tech question to please use the forum as it was intended. I am absolutely available by telephone to answer your questions as well but at times may direct you back to our website to better field your question or questions. Most other private messages I will be glad to answer for you.

    Thank you for your understanding.

    Jeff Ismail

Holley 1904 Economizer Replacement


New member
Digging up old stuff. I am in the process of bringing a 1966 Scout 800 back to life. I am now in the process of rebuilding the old 1904. I had it apart yesterday and noticed that the econo pump is not working properly. Does anyone know if this mod, and/or part is still available? And if so, where can one get this?


Robert Kenney

Super Moderator
Hi, unfortunately the 1904 main wells are no longer available. Changes of the people in the supply chain made it necessary to end offering them.


New member
Hi, unfortunately the 1904 main wells are no longer available. Changes of the people in the supply chain made it necessary to end offering them
Robert, Would there happen to be a print or cad drawing of this? I have the ability to machine this.


New member
No sir, I do not have anything I can share.
Its sad that this happens almost every time someone creates something great and makes it available to the community. They build it, sell it, best thing since peanut butter and suddenly a glitch happens be it what ever it is, that great creation stops getting made and the information about how gets put where no one will find it.

I guess I will have to reverse engineer this valve assembly and then post the drawings and the how to's so it wont get lost again.


Active member
If there is a market for them, I have access to a small 3D metal printer. Might last longer in stainless.