Search results

  1. J

    Engine temperature runing on muffs

    I have an 1983 MCM228R with a MC1 sterndrive. I have done extensive repairs on the engine and sterndrive and am now running tests on it with the boat out of water using the muffs on the sterndrive, I'm not sure what temperature the engine should run at, but I am seeing the thermometer climbing...
  2. J

    Prop off during test

    I have a 1983 MCM228 with a MC1 sterndrive. I am having trouble circulating water through the sterndrive and the boat engine. I took off the lower stern drive unit to look at the water pump (which was good). Now I am going to put it back together and do some testing with the sterndrive in a...
  3. J

    Upper/Lower sterdrive gasket

    I have a 1983 MCM228 with a MC1 Sterndrive unit SN 6289715. . I recently separated the upper and lower drives and wondered if there should be a gasket between the upper/lower drive units. Mine does not have one and it seems to be an obvious place for a gasket to seal the two units together. I...
  4. J

    Water pump impellor removal on an "R" outdrive

    I was trying to replace my water pump impellor on a 1982 Mercruiser "R" sterndrive and it seems to be stuck on the shaft. It absolutely won't slide off like I've seen in the YOUTUBE videos. I'm guessing the keyway is holding it in somehow. Anyone have any suggestions other than just tryig to cut...
  5. J

    MCM228 engine alignment

    In aligning a rebuilt engine I have to raise the front mounts so there is no thread left to secure the nuts and washer. I'm thinking of taking some old mounts- cutting off the bottoms and using these as spacers to put under the mounts I am presently using. This should give me enough height to be...
  6. J

    Horn and instrument guages

    I have a 1983 Wellcraft 196 Sunhatch with a Mercruiser MCM228R 5L engine (Serial#6275628). The horn was not working so I cleaned it out and backed off the adjusting screws to get it going. I noticed when I sound the horn my instrument guages all peg to the right. Is this normal? It doesn't seem...
  7. J

    Quick question on running engine outside of boat

    I set up my engine (1983 Mercruiser 305/5L MCM228 S/N 6275628) to run outside the boat. I ran water from a garden hose into the inlet hose on the underside port side of the engine (right where the power steering cooler is attached). I hooked up the fan belt to drive the water pump and started...
  8. J

    Upper stern drive shims

    I have a 1983 Mercruiser 305/5L MCM228R Serial# 6275628 with an "R" sterndrive. The bearing in the top of the stern drive (under the top cover) broke apart and needs replacing. All that remains of the bearing is the bearing inner collar still pressed onto the gear shaft and the bearing race...
  9. J

    Compression decision

    It's late in the New Hampshire season. I've been working for several weeks on this engine and have to make a decision. It's a 1983 Mercruiser 305/5L MCM228R Serial#6275628. My compression readings are AFT...
  10. J

    Harmonic balancer pulley differences between a MercruiserMCM228R and a Mercruiser 898

    I started with a Mercruiser 898 305/5L engine block and swapped over all the engine components from a cracked block 1983 Mercruiser 305/5L MCM228R Serial#6275628. This included the intake manifold, 4 barrell carb, distributor, Thunderbolt ignition, fuel pump, alternator,wiring harness, etc. I...
  11. J

    Running engine out of boat

    I have a 1983 Mercruiser 305/5L MCM228R serial#6275628. It has the Thunderbolt ignition. I want to run the engine out of the boat and can turn it over using a remote switch. I can get a spark by connecting the coil to the positive battery terminal. All the electrical connections are hooked up...
  12. J

    Checking for spark with exhaust manifolds off

    I have made alot of changes on my 1983 Mercruiser 305/5L MCM228R Serial#6275628 engine The engine is out of the boat and I wanted to check that I have replaced the ignition system properly. Does anyone see a problem turning over the engine to check each cylinder for a spark with the exhaust...
  13. J

    Riser flatness

    I was inspecting the risers from my 1983 Mercruiser 305/5L MCM228 Serial#6275628. The flatness of the bottom of the riser was a little compromised due to rust on the thin wall separating the exhaust gases from the coolant. I measured it to be about .025 inches deep about 1/5 the length of that...
  14. J

    Thermostat removal

    I went to remove my thermostat from a 1983 Mercruiser 305/5L MCM228R (serial#6275628) and it did not want to pop out. I noticed there is a sleeve on top of the thermostat which seems to be rusted into the thermostat housing. Do I need to just pry out this sleeve before the thermostat will pop out?
  15. J

    Intake manifolds on an Mercruiser 898 and a Mercruiser 228R

    I am swapping parts from my cracked block 1983 Mercruiser 305/5L MCM228 (Serial# 6275628) to an 898 Mercruiser 305/5l (serial # 5403332). The 898 has a 2 barrel carb and I was thinking of replacing it with the MCM228 4 barrel carb (with Thunderbolt ignition). It appears though, that this also...
  16. J

    Tricky engine installment

    I just removed a 1983 305/5L MCM228R engine form my boat. It was a little tricky since there is about a 1.5 foot fiberglass overhang over the engine that is one piece with the boat and not removeable. I got it out by sliding it forward and then lifting it out. I'm afraid re-installing it may not...
  17. J

    Motor Gaskets

    Can I buy gaskets (head; valve cover; water pump; exhaust and intake manifold; carb; etc) for a 1983 mercruiser 305/5L MCM228 engine from an auto parts store or do I have to go to a marine supply store? Basically is there any difference between marine gaskets and auto gaskets?
  18. J

    Swapping exhaust manifolds

    I want to swap exhaust manifolds from a 1983 Mercruiser 5L/305 MCM228 serial# 6285627 to a late 70's Mercruiser 898 5L/305 (198HP) serial #5403332. The '83 Mercruiser has the risers in the middle of the manifolds and the 898 has the elbows at the back of the manifolds. It seems to me if I swap...
  19. J

    Rusted n manifold removal

    I searched a few threads and am surprised I seem to be the only one with this problem. Any easy ways to remove old risers and exhaust manifolds for cleaning? This is an Mercruiser 898 198 HP serial#5403337
  20. J

    Mercruiser 898 compatibility with a 305

    Could I swap a 1983 mercruiser 305/5L serial#6275628 with a mercruiser 898 serial number 5403332?
Top