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post #19 of Old 08-03-2013
dem45133
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Re: Confused about which oil weight to use

Without a thermostat sometimes (depending flow characteristics) the flow can be too much and prevent full operating temp...

I supposed it could be possible that the stay time around the cylinder could be too short... too short to absorb enough heat.... but I really don't know... I think it might rare though or maybe impossible for a design to be that way and actually get real hot.

Is yours raw water cooled or freshwater cooler (i.e using a heat exchanger)? It would help in determining the culpret if we knew. (forgive me if you already stated that somewhere, but I haven't seen it if you did)

1980 Seafarer Swiftsure 30
1978 Bayliner Buccaneer 270 (now sold and being restored in FL)
1962 SeaMac 14' Plywood Runabout, mahogany decked, with 1959 Evinrude 35 Big Twin (owned since age 17, I'm now 60)
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