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  1. R

    Hard plane after switch from points ignition

    The 650-800 rpm engine 1985 the timing 4-8 BTDC ....now the rpm 1500rpm timing ? ... my engine oil 30wt and the zinc plus 4-6 OZ ...the gasoline 90-93 octane , the timing 4 BTDC .. my 1978 MCM470 is a very great engine ! gasoline 93 octane ...the 40 years
  2. R

    Mercruiser 3.0 stalls at 1000-1500 rpm.

    the carb and the gas filter cleaning carb and the new filter . the gasoline tank is the dirty ? my marvel mystery oil and the marine gas stabilizer treatment very good gas carb and the gas tank decades !
  3. R

    Which engine oil can I add?

    the MCM470 1978 engine oil 40w .. also the zinc 4-6 oz.
  4. R

    Hard plane after switch from points ignition

    so the 3.8L engine 1985 or 1985 4.3L engine ? so 1985 ignition 4- 8 BTDC timing 650-750 RPM ...
  5. R

    Mercruser 470/ 170 compatible parts

    was the engine Mercrusier ?
  6. R

    1976 888 Fuel Questions

    the new muffs two water hoses left/right outdrive .....the 140F of the engine ... damaged it of that one muff hose , damaged it ....175F engine water hotter ...
  7. R

    1981 120 Mercruiser idles rough when hot

    yes that ignition coil very hot off the resistor damaged it ... new ignition coil ..
  8. R

    1971 3.0 Liter Carb Question..

    THE 700 RPM IDLE AND THE TIMING 6 DEGS ... ALSO THE DWELL 31-34 ... THE IGNITION POINTS INSPECTED IT ..
  9. R

    Stern Drive transom lower right bolt fell out

    the wooden rotten of the engine studs ... the wooded is cleaned it out rotten .. then the fiberglass ..
  10. R

    Mercruser 470/ 170 compatible parts

    https://www.amazon.com/dp/B0177KD04S/ref=sspa_dk_rhf_search_pt_sub_7/?_encoding=UTF8&ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9yaGZfc2VhcmNoX3BlcnNvbmFsaXplZA%3D%3D&pd_rd_w=tjBUj&pf_rd_p=74b85f4a-bfbe-49a3-8252-7e9927a19318&pf_rd_r=RNK72149SPNHXTT4RKEV&pd_rd_wg=M3P3x&pd_rd_r=7149ea37-0043-429a-9f5d...
  11. R

    1976 888 Fuel Questions

    THE BOAT GAS TANK FLUSHING IT OUT ...THEN THE NEW 93 OCTANE GASOLINE ....gas tank MMO 2oz. 10 gallons around 2000 year alcohol 3-6 months tank .... the gasoline is a mess MUCKY... also the carb in the take it off clean it MMO oil ......
  12. R

    4.3LX & Weber Carb Service

    the carbs 6-8 psi gasoline ..
  13. R

    Correct spark plugs for an 888

    THE Mercrusier 888 manual 1976 serial #4529031 spark plug AC- MR43-T .... THE PERTRONIX VOLTAGE 20K VOLTS ... MY 470MCM MERCRUISER 1978 ENGINE IS PERTRONIX . BOAT 38 YEARS 1986 TODAYS 2024 .. THE GASOLINE IS NO GAS TANK IN THE OCTOBER .. THE CARB IS NO CORROSION ... DECADES ! DID THE GASOLINE...
  14. R

    Correct spark plugs for an 888

    THE MANUAL IS MY HOUSE .1979 MERCRUISER MANUAL .
  15. R

    Correct spark plugs for an 888

    ENGINE 888 PLUG .030 , 93 OCTANE GASOLINE , TIMING 10 DEG ....DECADES NOW THE 5 DEG ...DEWELL POINT 26-31 DEGREE ..ENGINE OIL 6 QTS .. 4K RPM MAX ..ENGINE OIL 25-40 WT ... PERTRONIX OF THE ENGINE THE TIMING INSPECT IT !!!! 700-750 RPM IDLE ....
  16. R

    Correct spark plugs for an 888

    so the Mercrusier 888 manual 1976 serial #4529031 spark plug AC- MR43-T https://www.myinboardmarine.com/collections/winterization-maintenance/products/spark-plug-oem-acd-mr43-t?_pos=2&_sid=0b689902a&_ss=r
  17. R

    First startup for the season and then died

    the fuel tank draining it of the bottle the engine hose ..watering it ..
  18. R

    First startup for the season and then died

    gasoline ... fuel filter also the water tank ..
  19. R

    Torn seal leaking gear lube

    so the China parts ! damaged it ..
  20. R

    Maintenance Grease/Oil

    SO the outdrive take it off... did the marine grease u joints and the shaft ...inspected it of the bellows .the drive fitting of the bearing bellows 4 fittings grease .. then the one shaft is that fitting grease 1 ... 5 grease of that bellows .. the shift cables inside it clean it and the...
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