Re: [OMC-Boats] Looking for the correct Thermostat

Best advice I can give is follow the flow measurement tests in the Seloc manual. Also make sure the four exhaust manifold hoses are connected properly (sometimes these get accidently reversed). (Correct routing is Thermo housing TOP to exhaust manifold BOTTOM). Also, watch the "Tell-Tale" stream on the outside transom.

Lee
  ----- Original Message -----
  From: heavy
  To: omc-boats@...
  Sent: Monday, September 17, 2007 12:44 AM
  Subject: Re: [OMC-Boats] Looking for the correct Thermostat

  Thanks Lee, I was able to pick one up at Fisheries Supply here in seattle for $16. While I was testing it in my driveway with the hose connected, I watched the temperature climb slowly from 100 up to 150 where it sat for a while. Since I wanted to be careful, I backed down the throttle and shut it down. I was thinking maybe since there was no load on the engine and the stat was rated at 160, the stat wasnt able to do its job just yet. The top two hoses coming from the impeller pump were cold, but the larger hose conneted to the stat housing to water pump was very, very warm, and I dont think the stat ever opened at all. I tried to start the engine back up after a minute but you could tell there was a lot of friction there and had a hard time turning over, my hunch is there is more going on here, maybe a blockage or wrong stat housing. Any thoughts you or anyone on the list could share about this one.

  best,
  jeff

------------------------------------------------------------------------------
  From: "Lee Shuster" <lee.k.shuster@...>
  Sent: Friday, September 14, 2007 1:56 PM
  To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...>
  Subject: Re: [OMC-Boats] Looking for the correct Thermostat

  I think the OMC OEM part no was 383307. Not sure but I think they are
  rated @... 150 F or maybe 160 F.

  I have a calibrated (digital) temp gauge I see 140 F at warm idle and
  150-ish when cruising pretty hard.

  Lee Shuster
  Salt Lake

  -----Original Message-----
  From: omc-boats-bounces@...
  [mailto:omc-boats-bounces@...] On Behalf Of Jeff LaCoste
  Sent: Thursday, September 13, 2007 12:29 PM
  To: omc-boats@...
  Subject: [OMC-Boats] Looking for the correct Thermostat

  Hi all,
  Anyone know what the correct Thermostat is for a Buick Oddfire V6,
  150hp?
  (boat is a 64 OMC deluxe) I called around and most of the books just go
  to the early 70's. Also, is it safe to run without a thermostat if I
  cant find one??

  Thx,
  Jeff

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Received on Monday, 17 September 2007