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  1. J

    ignition problems, help!!

    OK so I have no spark on all 5 cylinders on a 1991 force 150 with mercury ignition. After some testing I decided to change the switch box. I picked up a switch box on eBay, installed it. Tried to start with no luck, but I did smell smoke, not just raw fuel. I dropped one of the 10/32 nuts so I...
  2. J

    1991 force 150 no spark

    I just picked up a bayliner cobra bass boat with a 150 HP force outboard. Brought it home it ran fine. Cleaned up boat and engine, then it wouldn't start. Found no spark to plugs. After trying to figure it out all the sudden it just started working and ran fine once again. Started it multiple...
  3. J

    Fuel problem help???

    I have a silverline boat with a mercruiser 470 motor. Have had it out half a dozen or so times this year. Occasionally it would stall when going from idle into neutral and a couple times it stalled when accelerating from an idle. I would get close to planing out and it would stall. After a...
  4. J

    Guage Questions??

    I have a merc 470 with an alternator conversion kit. It is a single wire alternator. When running my guage reads about 10 volts. When I meter test it I have about 12-13 volts off, and about 14 to 15 volts when running. Is there any wiring change I can make to make the guage read the proper...
  5. J

    Mercruiser 470 cam seal ????

    My new cam seals arrived today and im ready to start re-assembly tomorrow. The new seals are different then the old ones I removed.The old ones were the same on either side so the seal was identical no matter what direction you put it in. The new ones are solid on only one side and the other...
  6. J

    Fuel Pump Gasket??

    Putting my merc 470 back together. I cant find a fuel pump gasket for it. Dealer said it is discontinued and I havent had any luck online either. Guess I need to make one? what is the best material to use for this gasket?
  7. J

    Merc 470 part numbers??

    I want to get a tune up kit for my 1981 merc 470. I want the cap and rotor tune up kit but cant narrow down which part numbers I need. Was looking at the kits on this site but not sure which to order. any help would be great thanks David
  8. J

    Mercruiser 470 Compression test question?

    Posted here recently about a boat I just bought. Had sat and had some rust in front cylinder. Boat had sat apart for awhile. I honed out the cylinder. cleaned up the block and head. No signs of warping or cracks. got new head gasket today and reassembled head. When I do compression test I goes...
  9. J

    Mercruiser 470 Motor questions

    I just picked up a boat in a trade deal with guy. Its and 81 Silverline with the 470 motor in it. The motor isnt running. I took off the head today. Was already mostly dissassembled from previous owner. Their is rust on the front Cylinder about 3 inches down. Looks as if the motor had sat for...
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