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United States of America, Sioux Falls
1 Level
706 Review
71 Karma

Review on Sierra International 18 3535 Marine Thermostat by Steve Rohde

Revainrating 5 out of 5

Perfect fit for my 1999 225 efi Mariner Optimax

When buying this thermostat, be careful and search carefully. Some websites have a parts chart for parts to select from and you may find this thermostat listed as unavailable. That's not true, the manufacturer upgraded the original from 120 degrees to 130 degrees, i.e. Sierra 18-3535. The OEM part will cost you double what you pay for that part.

Pros
  • Lots of positive vibes
Cons
  • I have no negative feelings everything is fine