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  1. J

    Engine compatablilty 1979 Mercruiser 305 and 1983 Mercruiser 305

    I need to replace a 1983 Mercruiser 305/5L MCM 228 (serial#6275628) or at least the block. I have a chance to get 1979 Mercruiser 305 898 engine (198HP). Are these engines compatible in terms of the block and should I be able to swap carbrators, manifolds, distributors, etc. Are the sterndrives...
  2. J

    Mercruiser 305/5L V8 MCM228 engine block

    I have a 1983 Mercruiser 305/5L MCM228 V8 engine (Serial#62785627) with a cracked block. Can I get a long block from a auto junkyard and swap over the engine components from the cracked block?
  3. J

    Hours per gallon as a function of throttle throttle setting

    I have a 1983 Mercruiser 305/5L MCM228 V8 engine (Serial#6285627) on a 19 foot Wellcraft Sunhatch 198 boat. I have not yet had this boat in the water since the engine has a cracked block. I am weighing the decision to rebuild the engine and one of the factors I'm weighing is how many...
  4. J

    Bilge pump wiring

    I have a 1983 Mercruiser 305/5L MCM228 engine with serial#6285627. There is a Mayfair Marine bilge pump model 22502 (500GPH Pro-Line) in the engine well. Going into the well are 3 wires in the harness - 2 go to the pump and the 3rd wire goes to what looks like a foot pedal. It is labled Atwood...
  5. J

    Conflicting info on engine oil and oil filters

    I have a 1983 Mercruiser 305 V8 MCM228 engine with serial#6285627. I'm trying to bring it back to life after sitting 2 years. The oil filter I removed was a QUICKSILVER 35-802885Q. The dealer wanted to give me a 35-866340Q03. It was shorter than the one I took off so I ended up with one a little...
  6. J

    Belt Pulley configuration

    I just bought a 1983 boat with a Mercruiser 305/5L V8 and what looks like a Alpha One Gen 1 sterndrive. I was able to unseize the engine (good compression) and need to install belts. The previous owner gave me 2 belts one a little larger than the other, but I can't find the belt diagram in my...
  7. J

    Broken bearing in upper sterndrive

    I have a 1983 Mercruiser 305/5L MCM228 V8 engine. I took off the cover off the upper stern drive and found the gears locked up due to the top bearing breaking and pieces getting wedged in the gears. To remove the pieces I have to get at least the drive gear out. My manual says I need a special...
  8. J

    Identifying sterndrive model and serial number

    I have a 1983 Mercruiser 305/5L MCM228 engine with serial # 6285627. The plastic sterdrive serial# on top of the bell housing is broken off. There appeared to be a label on the port side of the bell housing lower down, but this is also beyond reading. I read somewhere the serial number was...
  9. J

    Stern drive allen-head screw

    Anyone have a secret way of removing a rusted on 3/8" allen-head set screw above the trim tab on the stern drive? I've soaked it in WD40 and thought I would ask around before I threw caution to the wind and put as much force as possible on the wrench. The stern drive is on a 1983 Mercruiser...
  10. J

    Sevicing an un-siezed engine

    I bought a boat with a seized engine. Previous owner ran boat engine out of water, Assuming I can un-seize the engine what other things should I service and/or inspect, replace on the engine and sterndrive? I plan on doing the normal tune-up stuff plus a compression test. This is a 5L...
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