Diesel Fuel Filters and Fuel Additives - Recommendation - MerCruiser Service Bulletin 90-814099

Oct 23, 2026

Uploaded by Sarah

Service bulletin for MerCruiser Diesel applications addressing possible diesel fuel contamination and algae growth that can clog the lift pump and cause poor performance. Recommends installing a fuel filter before the lift pump, specifically a Racor Model 500 with a 10 micron rating or equivalent, and adding a diesel fuel additive to reduce algae risk in warmer climates. Also provides MerCruiser service manual ordering information and BMW-related parts manual coverage references, along with model listings.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages47

Reading Time1 h 58 min

AccessFree to download

Recommendation

Service Manual and Ordering Information

MerCruiser Diesel Service Bulletin

BMW Diesel Engine Overheating Checks

TO:SERVICE MANAGER□ TECHNICIANS□PARTS MANAGER□ Diesel Fuel Filters and Fuel Additives Models MCM/MIE D3.0L,D3.6L,D4.2L and D7.3L Diesels Situation Possible contamination of diesel fuel and algae growth in the diesel fuel that could cause the block-age of the lift pump resulting in poor performance. # Recommendation It is recommended that in MerCruiser Diesel applications listed,a fuel filter be installed before thelift pump.MerCruiser recommends a Racor Model 500 with a 10 micron rating or equivalent typefiter.This will help to filter out contaminants in diesel fuel.It is also recommended that a diesel fueladditive be added (to combat algae growth)particularly in warmer climates to reduce the chancesof algae growth in the diesel fuel. ## TO:SERVICE MANAGER □ TECHNICIANS□PARTS MANAGER□ The MerCruiser Diesel Service Manual is nowavailable.This manual will not be sent out in a servicemailing.To order a manual contact your RegionalParts Department. MerCruiser Service Manual 90-814099 Owners,Service and PartsManuals for B.M.W.Gasolineand Diesel Engines Owners,Service and Parts Manuals for B.M.W.engines are now available from your RegionalDistribution Center.Listed below are part numbersand models covered by each manual. Service Manuals -Gasoline Engines B.M.W.B13090-802128176 B.M.W.B190/22090-02128178 B.M.W.B63590-802128521 B.M.W.Power Steering90-802128507 Parts Manuals -Gasoline Engines B.M.W.B130/190/220/63590-802128041 Owners Manuals -Gasoline Engines B.M.W.B13090-802128395 B.M.W.B190/22090-802128398 B.M.W.B635Z90-802128517 Service Manuals-Diesel Engines B.M.W.D15090-802128187 B.M.W.D190 Appendix90-802128369 B.M.W.D63690-802128424 B.M.W.D530 Appendix90-802128476 B.M.W.Power Steering90-802128507 Parts Manuals -Diesel Engines B.M.W.D150/190/530/63690-802128040 MerCruiser Diesel ServiceManual # service bulletin Owners Manuals -Diesel Engines B.M.W.D150/19090-802128392 B.M.W.D530/63690-802128496 Service Manuals-Stern Drives(Gasoline and Diesel) B.M.W.Stern Drive90-802128186 B.M.W.Mark I//I Drives90-816330 ## Microfiche Parts Cards for B.M.W.Engines/Drives In July of 1988,microfiche parts cards for B.M.W.Gasoline and Diesel engines were mailed to all Mer-Cruiser Dealers.To order extra copies refer to yourRegional Distribution Center. B.M.W.Microfiche Parts Cards P/N 90-816097 Converting B.M.W.PartNumbers to QuicksilverReplacement Part Numbers To convert a B.M.W.part number to a Quicksilverreplacement part number you must drop the first four (4)digits of the B.M.W.numberand replace them withthe numbers “Eight Zero”(80).Refer to examplefollowing. Example: B.M.W.Number01412128398Converted Quicksilver Number802128398 Quicksilver computers will accept this nine (9)digitnumber. V12 Engineering Box50,Oatano,C2:eda POX1C0 Vww.bmwmannenet ## TO:SERVICE MANAGER □PARTS MANAGER□ B.M.W.Stern Drive/lnboardsModel D636 Diesel Engines(Grey Engines)Overheating If experiencing an overheating condition with a BMWD636 dieselengine,one of ora combination of the fol-lowing conditions may be the cause. Check the following first: 1.Check heat exchanger tank for coolant at properlevel(1/2”-3/4”[12mm-20mm]below filler neck). 2.Check and compare temperature with an accu-rate independent instrument i.e.(possible mal-function of gauges,senders,wires,ground,etc.). 3.Pressure check cooling system and cap withautomotive cooling system pressure tester.14 PSI(100 kPa)required.Because old stylecoolant tank cap (single seal type)is vulnerableto leaking,recommend replacing with new stylecap,P/N 63832A14. 4.Check engine circulating pump for possible mal-functions. ·Loose/slipping alternator belt ·Impeller vanes worn ·Impeller shaft seal leaking ·Impeller clearance to pump housing(.015”一.020"1.038mm-.050mm) NOTE:Replace with new style pump,P/N46-814255,if necessary. ### 5.Check engine coolant concentration to ensure50/50 mixture. NOTE:-34F(-37C)in

FAQs

What problem does the bulletin address for MerCruiser diesel applications?

It addresses possible contamination of diesel fuel and algae growth that can block the lift pump and lead to poor performance.

What is recommended to be installed before the lift pump?

Install a fuel filter before the lift pump, recommended as a Racor Model 500 with a 10 micron rating or an equivalent type filter.

Why is a diesel fuel additive recommended, and when is it especially important?

A diesel fuel additive is recommended to combat algae growth, particularly in warmer climates to reduce the chance of algae in the diesel fuel.

Oct 23, 2026

Uploaded by Sarah