Changes to Mercruiser Thermostat Housings - Performance Product Technologies

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Marine Engines Repower – Bayliner Cierra 2655, 1991 model Mercruser MCM 5.0l LX
Dennis, Thanks for your inquiry and the opportunity at earning your business. Since Mercruiser made both Alpha and Bravo sterndrive models with that engine I would not be able to tell you without knowing which one your engine is setup for. Can you give me the original engine serial number? Or can you tell me if [...]

4.3L Marine Engine Longblock Performance Specification
Mike, Thanks for your inquiry and the opportunity at earning your business. The Hp rating for longblocks is determined by the fuel system that’s install back onto the engine. For example since GM only produced one marine version of the 4.3L during this timeframe Mercruiser used this same longblock on their 190 Hp 2 barrel carb [...]

Marine Engines – Replacement marine engine for my boat 5.7 mercruiser 1992 #0d763634
Marty, Thanks for your inquiry and the opportunity at earning your business. Using the links below you can review your options. Let me know if you need any further technical information or help placing your order. In either case I will be glad to assist! Link to Block Code/Serial Number Location http://www.perfprotech.com/store/app_themes/PPT/images/block-casting-no.jpg Link to Remanufactured Longblocks http://tinyurl.com/68kcet8 Link to Remanufacturing [...]

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Step by Step Video Instructions illustrating how to change an electric fuel pump on a Suzuki DF70 outboard motor. Watch Video

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Thermostat Housings No Longer Available

Models

MCM, MIE V6 and V8: P/N 807123A 2 or 807790A 1 Cast Iron Thermostat Housings and P/N 806235A 1 Stainless Steel Thermostat Housing.

Replacement Parts

Three new replacement thermostat housing kits are available for these engines. Each type of housing is designed to give better thermostat response to the engine in relation to the type of seawater pump that the engine uses. Affected parts lists will be updated soon.

NOTE: These kits have shorter bolts included in them for use on engines that do not have a lifting eye.

NOTE: Because of water flow differences, do not put Alpha housings on Bravo engines or Bravo housings on Alpha engines.

860256A 3 Thermostat Housing. USE ONLY ON Alpha Sterndrive engines. (’ALPHA’ cast on top of housing. P/N 860256C or 860256C 3 on bottom).

860256A 4 Thermostat Housing. USE ONLY ON Bravo Sterndrive, ski or inboard V6 or V8 (350 cid) engines. (No name cast on top. P/N 860256C1 or 860256C4 on bottom).

861006A 1 Thermostat Housing. USE ONLY ON Bravo Sterndrive, ski or inboard V8 (454 or 502 cid) engines. (No name cast on top. P/N 861006C on bottom).

a -Thermostat Housing.

Technical Articles

Models

Replacement Parts