Quicksilver Thermostat Kit 140oF
Genuine Mercury Marine Part for Mercruiser Engines
To fit GM based Mercruiser engines with 140oF or 143oF thermostats & standard cooling.
Popular models include 4.3L, 4.3LX, 5.0L, 5.7LX, 350 Mag.
See below for full application list.
Supplied as a kit including 140oF Thermostat, O-Ring and Gaskets.
P/N: 807252Q4
This part supersedes from part number: 807252T7
Kit Contents:
- Thermostat 140oF P/N: 807252T1 (Supersedes from 59137)
- Thermostat Cover Gasket P/N: 27-41812Q (Supersedes from: 27-41812)
- Thermostat Cover Gasket P/N: 27-33179Q02 (Supersedes from: 27-331792)
- Thermostat Cover Gasket P/N: 27-47510Q (Supersedes from: 27-47510)
- O-Ring P/N: 25-30224Q (Supersedes from: 25-30224)
- Thermostat Housing Gasket P/N: 27-53045Q01 (Supersedes from: 27-530451 / 27-33179)
Kit is to cover all later GM based applications with standard cooling and require 140oF Thermostat, and therefore may contain gaskets and seals which are not used for your particular engine.
Applications:
175/4.3L/4.3LX / V-6 / 262 / 0B527955 & Up / Old Design
175/4.3L/4.3LX / V-6 / 262 / 0B527955 & Up / New Design
185 / V-6 / 229 / 6330183-6919655 / -
185 / V-6 / 229 / 0A331455-0B527954 / -
200 GM / V-8 / 305 / 6218462-0B525981 / -
200/5.0L GM / V-8 / 305 / 0B525982 & Up / Old Design
205 / V-6 / 262 / 0A331455-0B527954 / -
205/4.3L/4.3LX / V-6 / 262 / 0B527955-0D714369 / Old Design
205/4.3L/4.3LX / V-6 / 262 / 0B527955-0D714369 / New Design
225 GM / V-8 / 305 / 2278647-2399197 / -
228 GM / V-8 / 305 / 6218462-0B525981 / -
230 GM / V-8 / 305 / 6218462-0B525981 / -
230 GM MIE / V-8 / 305 / 5907058-0B522505 / STD Cooling
230/5.0L GM MIE / V-8 / 305 / 0B522506-0B525981 / Old Design, STD Cooling
230/5.0L/5.0LX GM / V-8 / 305 / 0B525982-0F600999 / Old Design
230/5.0L/5.0LX GM / V-8 / 305 / 0B525982 & Up / New Design
260 GM MIE / V-8 / 350 / 5907058-0B522505 / STD Cooling
260/5.7L GM MIE / V-8 / 350 / 0B522506-0B525981 / Old Design, STD Cooling
260/5.7L GM MIE / V-8 / 350 / 0B522506-0B525981 / New Design, STD Cooling
260/5.7L GM / V-8 / 350 / 0B525982-0F600999 / Old Design
260/5.7L GM / V-8 / 350 / 0B525982-0F600999 / New Design
350 Mag / V-8 / 350 / 0B525982-0F600999 / -
5.7 GM (SKI) / V-8 / 350 / 0A338553-0B514626 / -
5.7 GM SKI/BRAVO / V-8 / 350 / 0B514627 & Up / Old Design
5.7 GM SKI/BRAVO / V-8 / 350 / 0B514627 & Up / New Design
300 MR/TRS GM / V-8 / 350 / 6668677-0B430367 / -
325 GM / V-8 / 427 / 2278747-231964 / -
330 GM w/Borg Warner / V-8 / 454 / 6083145 & Up / STD Cooling
340/7.4L GM MIE / V-8 / 454 / 588914 & Up / Old Design, STD Cooling
340/7.4L GM MIE / V-8 / 454 / 588914 & Up / New Design, STD Cooling
7.4L BRAVO GM / V-8 / 454 / 0B771113-0D603117 / Old Design
7.4L BRAVO GM / V-8 / 454 / 0B771113 & Up / New Design
7.4L MIE w/Hurth / V-8 / 454 / 0C391564-0D715493 / STD Cooling
350 GM (MAGNUM) / V-8 / 350 / 0A635178-0B525981 / -
350 GM (MAGNUM) / V-8 / 350 / 0B525982 & Up / Old Design
350 GM (MAGNUM) / V-8 / 350 / 0B525982 & Up / New Design
370 TRS GM / V-8 / 454 / 6721528 & Up / -
454 GM MAGNUM/ALPHA / V-8 / 454 / 0A631894-0B785148 / Old Design
454 GM MAGNUM/BRAVO / V-8 / 454 / 0A631894 & Up / New Design
898 GM / V-8 / 305 / 6218462 & Up / -
Notes:
Old Design: Earlier Cooling System Design (I)
New Design: Later Cooling System Design (II)
STD Cooling: Raw Water (Open) Cooling System – Raw Water (River, Lake, Sea) Water runs through Cylinder Block.
MIE: Mercruiser Inboard Engine
