Johnson Vernatherms

Vernatherm for Johnson/Evinrude 394411 - Sierra
Your Price: $16.99
Save: $2.70
(13% Off $19.69)
Part # 18-1506 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 10 hrs 17 mins. For:
  • 10/15 (1993-95)
  • 60/125/185 (1989-90)
  • 65 (1987-89)
  • 70/200/225 (1986-90)
  • 120/140/300 (1985-90)
  • 275 (1985-88)
Applies for Johnson/Evinrude engines

Replaces OEM part #
  • OMC 394411
Vernatherm for Johnson/Evinrude 384719 - Sierra
Your Price: $33.99
Save: $10.27
(23% Off $44.26)
Part # 18-3560 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 10 hrs 17 mins.
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105 Degrees

Fits most 3 & 4 cyl. 1985-90

Applies for Johnson/Evinrude engines

Replaces OEM part #
  • OMC 384719
Mallory Vernatherm (105) 9-43027
Mallory Vernatherm (105) 9-43027
Your Price: $32.99
Save: $8.95
(21% Off $41.94)
Part # 9-43027 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 10 hrs 17 mins.
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Replaces Original Equipment Manufacturer(OEM):Johnson/Evinrude
Replaces Original Equipment Manufacturer # (OEM #):384719
OMC V4/v6 Thermo Seal
OMC V4/v6 Thermo Seal
Your Price: $2.14
Part # 550-07
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    OMC:
  • 335981
OMC V4/v6 Eagle/ficht Seal
OMC V4/v6 Eagle/ficht Seal
Your Price: $16.66
Part # 550-12
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    OMC:
  • 335981
  • 336232
Sierra
Based On 2 Reviews | Write Review
works as intended
by Chris from Sarasota, Florida on June 03, 2014
rather than replace the whole thermostat assembly, 99% of the time th eissue is the vernatherm. While they rarely go bad, the metal can corrode making the piston unable to move. how it works: looking at the picture of the unit, you have a pin at the far left, that rests on top of a piston. The piston has a limited amount of travel, maybe 1/4 inch. When cold the pin is pushed against the piston by a spring that is part of the thermostat assembly. inside the vernatherm is probably paraffin, when cold it allows the piston to collapse. When hot, the paraffin expands which pushes out the piston , which in turn pushes out the pin. When the pin is pushed all the way out the big bulbous portion of the vernatherm is not longer sealing the water ports of the thermostate assembly allowing water to enter the cylinder head. I was able to fix my old ones by pulling the pin out with some force and wet sanding the pin so it moved freely. But I put these way as spares. Every season , pull the assemblies apart and test the pin and test the vernatherms in a pot of hot water.
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works as stated
by Jeffrey from Charlotte, North Carolina on June 06, 2011
uses original t-stat housing
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