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37 roamer riviera prop sizes?

Discussion in 'Chris Craft Roamer Yacht' started by Oneiros, Aug 23, 2013.

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  1. Oneiros

    Oneiros Member

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    lulea Sweden the land of the midnightsun
    Hi
    Anyone know how big prop I can install on my 37 roamer rivera it sits 21x23 inch propellers now and I want to change these to 23x22 inches unfortunately the boat lies in the water so I can not measure them now
    Erik
  2. Rapple

    Rapple Member

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    Home port is Greenbay, WI., although most of our t
    prop chart

    attached is a chart for prop sizes subject to hull material and engine size. I hope this helps. This is for years1955-1965.

    Attached Files:

  3. Capt J

    Capt J Senior Member

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    What are you RPM's now? Does the boat have an issue getting onto plane? Why do you want to increase diameter and reduce pitch? Increasing diameter will only help get the boat onto plane and possibly staying on plane at a slightly lower RPM, but you will have to decrease pitch and resultingly reduce speed across the entire rpm range.
  4. Laurence

    Laurence Senior Member

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    Chattanooga TN
    Diesel

    The chart shows a Cummings engine used in some Offshore models. Does anyone know which diesel engine?
  5. Oneiros

    Oneiros Member

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    Hello!
    Thanks for the the table I thought I had the original propellers for those days when it sat V8 gas engines in my boat, but now I know that they are replaced I have run the boat aground and I are looking for new on ebay :)
    Erik
  6. Oneiros

    Oneiros Member

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    Engine speed is 3000 rpm I have run aground and had to find new propellers
    one guy had 2 pieces for sale on ebay, but I think I'll buy new, so I know they will come and fit my motors
  7. Capt J

    Capt J Senior Member

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    Top engine RPM is only 3000 rpms? What engines do you have? If you have gasoline that is way too low and you're running props that are too large. Most gas inboards of that era, top rpm was 4000-4400.
  8. Oneiros

    Oneiros Member

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    Hello!
    it is detroit diesel 8.2L and these will only wind 3000 rpm
  9. Capt J

    Capt J Senior Member

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    You never said that in your ealier posts.....sorry
  10. bolsado

    bolsado Member

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    Prop-Info

    My orig prop info was on some brass tags nailed to the forward lip of the engine hatches. There is also a serial number on most props. Michigan Wheel can tell you what it is by the serial number.

    Mine (37 AL Rivera) were replaced along the way as were the engines.
    I have it written down but not handy tonite and will try to post later.

    I have spent a lot of time with a spread sheet called prop-calc I found surfing the web.

    I have found it to be the most useful tool in considering options from a layman's point of view and fooling around but I would consult with experts though at Michigan Wheel for final recommendations.
  11. Oneiros

    Oneiros Member

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    Hello!
    I searched propellers on ebay, but eventually I bought from a marine company in Florida
    now I'm waiting for these propellers good price $ 2,000 hope I get them next week
  12. bolsado

    bolsado Member

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    Prop-Info

    In looking up my info it seems to match the table Rapple provided.

    The SN tags from my boat match at 4066 and 4067 which are for a 37' 1965 Aluminum Roamer Rivera 20x21x1 3/8 shaft.

    Thanks Rapple for posting this table as this confirms what I assumed was the original engine config of 327F 210 hp w/ paragon 2.5:1 trans. My replacements by the PO are 3 blade dynajet bronze 21x22 and a GM350 reported to be 250 hp.

    It seems this table is a bit older as it lists the 431 MEL but not the 427's which is what I am trying to approximate.
  13. bolsado

    bolsado Member

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    pic of 21x22 prop

    Heres a good pic of clearance at this size

    Attached Files:

  14. Oneiros

    Oneiros Member

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    Soon :)

    Hello!
    according to the packing slip from 1966, there have been chris craft 426 300hp in our boat
    so then the previous owner replace enginer and the propellers to 21x23 to Detroit diesel serie 8.2l she seems to go nicely with these 26 knots
    Now I wait for the new ones these propellers are new jearsy and soon in my hand the season is almost over but I'll try them before we take the boat up
    Erik the swed
  15. gravy

    gravy Member

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    River bend marina St. Clair MI
    Hello My steel 37 has 427 side-oilers and the original props, she planes off at 2800 rpm every year I pull them because of all the dead heads that float in the St. Clair river and the pine river, and have them tuned up at smiths prop shop in Algonac MI which is a half hour from my house. I can get you the numbers this weekend if needed. Gravy
  16. Oneiros

    Oneiros Member

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    Hi
    okay i have ordered new propellers that will fit into my diesel engines
    thanks anyway
    Erik F