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What water temp on 1999 502MAG

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Old 05-21-2003 | 09:53 PM
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nitro/max
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Question What water temp on 1999 502MAG
What should the water temp run in 1999 502(415hp)? I used to have 1997 502MPI it always ran at 140 degrees. thanks
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Old 05-21-2003 | 11:33 PM
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my 1996 runs between 160-170.

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Old 05-22-2003 | 08:14 AM
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My 454 Mag MPI runs about 170.
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Old 05-22-2003 | 08:24 AM
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Im running 160-170 and can hit 180 on an extended hard run. It is very steady and consistant with how hard the boat is working.
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Old 05-22-2003 | 08:25 AM
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Dave M, thanks for posting. I have your same engine and was wondering myself. Both of mine run 165-170*. I may hit you up for other engine questions later on. Will ya help another MD brutha!
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Old 05-22-2003 | 10:10 AM
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2000 502 Mag MPI run 175* to 180* very consistant.
160* Thermostate also here
Last edited by GLH; 05-23-2003 at 05:43 AM.
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Old 05-22-2003 | 10:13 AM
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my '99 502 mpi FWC is a consistent 180*
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Old 05-22-2003 | 01:08 PM
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Mine runs at 180°, 1999 502 mag mpi
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Old 05-22-2003 | 06:26 PM
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180 Stock exhaust
175 wit new Stainless Marine.
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Old 05-22-2003 | 11:06 PM
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They have a 160 deg thermostat. If you have Gaffrig gauges, they always show 175 to 180.
 
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