Search results

  1. D

    50 HP Mercury Outboard Trim Relay

    Can anyone give me a part number for the attached picture of the trim relay? The serial number is 0D174594. Every parts manual I look at list two separate relays (one for up and one for down) The issue is the motor will trim up but not down. Thanks in advance
  2. D

    Shift Shaft Coupling

    1992 Mercury 50 HP, 3 cylinder, 2 stroke Serial Number 0D174599 Bought the bought running on muffs only. Dropped the lower to do an impeller change. (control in neutral). Unfortunately the shaft coupling dropped to the ground. I have never seen this type before, with what looks like a cam lobe...
  3. D

    port or starboard trim switch

    I have an 86 alpha 1 . I am trying to adjust the trim . The starboard trim cover has the initials TL on it and the port has nothing. Is this correct? In the manual it looks like its the other way around, if TL is the switch. In the manual it also looks like it actual says Starboard and port on...
  4. D

    470 Front Engine Mount

    I have an 1986 Thundercraft witha 470. I have the engine lifted to do the cam fix. I noticed the mount had four holes in the bottom of the mount. Can I put two lags in the empty holes? One of the lags was rotted. I was going to fill with epoxy . Overall mount seems sturdy.
  5. D

    Gm hei

    Has any one put an HEI in an 86 Merc 170. If so do you have a PN# please and thank-you
  6. D

    No spark troubleshooting

    !986 Merc 170 in a Thunder craft Fresh charge on battery new points (set at 22 thou) condenser rotor coil Tach disconnected New primary wire 12 volt on both side of coil 12 volt to points Tried disconnecting purple resistance wire and putting twelve volts to coil points are opening Coil...
  7. D

    Merc 170 Coil voltage

    All Does anyone know what the coil voltage should read when the key is turned on (not running) I am getting 11.91v to ground on the + side. Is there a difference between start coil voltage vs run coil primary voltage ? The purple wire which is supposed to be the resistance looks fine. Is there...
  8. D

    Heat Exchanger Plugs

    Has anyone had any luck with plugging tubes in a heat exchanger? They are approximately 5/16". If so does anyone know wher they can be purchased ? Thanks Dave
  9. D

    Antifreeze Leaking Out intake

    All I ahave an 86 merc 170 with an alpha 1 drive. I pull the exchanger out for the winter because the drain was stripped when i got the boat. When I put the exchanger back in and filled the motor with antifreeze, it leaks slowly out of the lower unit intake. Any thoughts or suggestions ? David
  10. D

    Shift Cable Spiral Wrap

    I have an Alpha 1 that I am replacing the shift cable on. The kit came with a piece of spiral wrap. Does anyone know where this goes? Thanks, Dave
  11. D

    Merc 170 slow turnover

    my 170 4cyl merc turns over real slow, regardless of battery charge. It also has been timed to factory specs. Any insight?
  12. D

    Merc 170 points to electronics conversion

    Anyone have any luck with an points to electronic conversion? Pros, cons. Any Brand better, Mallory?Sierra? Thanks Dave
  13. D

    Alpha 1 Exhaust Bellows

    Is there anyway to replace the exhaust bellows without removing the upper unit. Any tips or tricks would be appreciated. Rant-seems like an awful lot of work to replace basically a hose.. One would think that the design would allow for replacement without dropping major components
  14. D

    Alpha 1 drive shift shaft washer

    I have a question. Their is shift shaft washer that sits on top of the shift shaft. Is it supposed to be flat or cupped? The one on my shaft is cupped. If it supposed to be cupped is, it cup up or cup down. Thanks in advance for your help. (GEN I)
  15. D

    Merc 170 Alpha 1 no reverse

    Dropped lower unit to replace water pump impeller. Put back together without realizing I needed to put the drive in forward. Dropped unit again , put in gear went together fine. Started motor put in forward.. no problems. Put drive in reverse ( slight clunk but it always did this) put the clunk...
  16. D

    Alpha 1 drive part

    While dropping the lower unit to replace the water pump impeller this piece dropped to the ground with a clink. There are only a couple of witness marks on the piece. It does not show up in any of the Clymer schematics or the schematics at West Marine. It is a 1986 170 inline 4, it is a first...
Top