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  1. 8

    Trim Hose replacement on the inside of the boat.........How to get to them?

    1979 228 Mercruiser pre-alpha I am trying to fiugure out how to change the trim hoses that go down to the bottom of the transom plate, beneath the exhaust. Do they penetrate the transom, or they connect down under the plate area? It is hard to see down there and I am not sure how to get a hold...
  2. 8

    Exhaust Shutters 1979 pre-alpha drive

    I am installing new exhaust shutters on my y-pipe separator junction. Does it matter which orientation the shutters are installed ie. pivot verticle, pivot horizontal etc. ? Ed
  3. 8

    O ring sealant ?

    i am re-assembling my exhaust pipes for my 1979 pre-alpha project. The surface on the exaust pipe side that is flat, in is good, but not perfect. I would like to know if there is something I could coat the o rings with that would help insure a good seal? thanks
  4. 8

    5.7 mercruiser bench test starboard riser hotter than port

    I am running my fresh 5.7 longblock set up on the engine stand. It is a mercruiser 1995 setup using centerrise manifolds, thermostat housing, etc. all is well but for two issues: 1) I see the starboard side of engine water flow out the exhaust is less than port, the riser on the starboard is...
  5. 8

    Trim sender wires broken off

    1979 pre-alpha drive with trim sensors. starboard side of trim sensor has wires broken off right at the casing. under the little cover, I see two plastic pieces that the wires came out of, but no way to re-attach the wires. Is this just an automatic replacement? do new trim sensors have wire...
  6. 8

    Did I get my gimbal bearing in all the way?

    1979 228 Mercruiser with R drive. I am doing some transom repair and just installed my gimbal bearing and retainer ring. The outer edge of the retainer ring is flush with the inside edge of the housing, about 3/8 " deeper than the outside housing rim (where the bellows will attach). Does this...
  7. 8

    Alpha bell housing help please

    I am replacing the shift rod bushings on my pre alpha bell housing.... does the lower bushing go in far enough to be flush with the top? or flush with the bottom and protrude out the top a bit? thanks Ed
  8. 8

    Engine stalls turning left at idle.

    My boat stalls, or nearly stalls when I turn the steering wheel full left. While at low engine idle, when turning left just before you reach the limit of turning range, you can hear the engine start to labor, then stall. It has done this for a couple of years. I have learned to back off full...
  9. 8

    Pre-Alpha Transom Rehab.......what order should the steps be done?

    I have a 1979 Mercruiser 228 transom assembly with an R drive I believe. I am putting a repower engine in the boat, and I am rehabing all the bellows, gimbal bearing, etc. Specifically: I am replacing the gimbal bearing and ring, u joint bellows, shift cable, shift cable bellows, exhaust...
  10. 8

    fuel pump water separator and carb question

    I have a 350 engine with a mechanical fuel pump from a 1995 350 mag alpha setup. There is a hose nipple on the fuel pump. My older 1979 had no such hose nipple. The old version had a sight glass with a stamped note in it saying "if gas appears in this bowl, replace the fuel pump". Now, on my...
  11. 8

    1998 5.7 Vortec OMC Engine specs

    I have purchased a longblock that was originally intended for an OMC application. I have narrowed the model to a 1998 OMC 572BPBYC. Does anyone have access to tune-up specs, and RPM range for this engine? I think the recco. spark plugs are Champion RS12YC. Can anyone confirm this? thanks, Ed
  12. 8

    spark plugs and tuning specs for new long block install

    I bought a 5.7 longblock with 10243880 block stamp and engine code V07267MH (stamped on front of engine where circ. pump bolts on). I am trying to get spark plug type, gap, timing info. and rpm range data. can anyone help? thanks Ed
  13. 8

    Metric oil drain plug on gm longblock?

    i bought a remote oil drain hose for my 350 engine (in process of assembling from a recent purchase longblock). I put a 9/16 socket on the oil pan drain plug and it was too small. 5/8 too big......15mm just right. why are metric bolts on a gm engine? anyone know the thread size to order for...
  14. 8

    Carb selection for repower project

    I am putting a 5.7L vortec in my old 1979 Century 3000. The intake manifold is a spreadbore cast iron manifold sold by Michigan Motorz. I have an old Rochester Quadrajet, but needs an electric choke conversion. This seems simple, but in truth, I had so much trouble last season with my old...
  15. 8

    exhaust manifold installation Mercruiser centerrise 5.7

    I am installing cast iron center rise exhaust manifolds on my 5.7 engine. I would like to confirm my install process: clean surfaces...new gaskets, applied dry......bolt torque to 35ft lb both manifolds and riser bolts... torque in three steps to final, from inside to out.....re-torque after...
  16. 8

    Rochester carb conversion to electric choke

    I have a rochester quadrajet that is in nice shape. It has a manifold mounted mechanical choke set up. I would like to move this carb to a new vortec manifold.....which does not have a set up to mount the divorced choke. they sell kits to convert rochesters to electric, but they rely on...
  17. 8

    5.7 longblock dipstick plug........I cant get it out!

    My new 5.7 gm longblock came with a steel plug in the dipstick tube hole. I tried tapping on it with a small chisel.....no movement. I tried putting locking pliers on it to turn it.....no go. I tried drilling it with a small drill and then tapping it to put a bolt on to get a grip.....broke...
  18. 8

    5.7 vortec motor retro fitting to Alpha Bell housing and transom mount

    I am finding a clearance problem with my thunderbolt 4 distributor and the shift bracket on the rear of the bell housing. The module built into the thunderbolt distributor body is hitting against the shift plate. I can make a clearance if I use longer bolts and a spacer (about 1 1/4 inch does...
  19. 8

    shutter valves on old style mercruiser exhaust

    I have a 1979 228 Mercruiser with the old separator and two side exhaust pipes. The backflow shutters mount right at the junction of the separator and the pipe that runs up to the exhaust elbow. my question is this: I ordered the right part #(60930) and got shutters that are oval shaped and...
  20. 8

    Repowering with 5.7 Vortec long block which intake manifold and carb

    I am repowering my 1979 Century with a new vortec longblock and am looking for some advice on an intake manifold. I am in fresh water lakes in Pennsylvania and cool with raw water. also, I have a Rochester quadrajet and a newer Weber (1995 Merc 350 Alpha) 4 barrel. any suggestions on which carb...
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