Search results

  1. M

    boat harness to engine pin came out

    when removing the plugin wiring harness from the motor a pin came out. ideas on fixing replacing?? 1981 120 s/n 5828080 engine Transom plate s/n 5776312 Stern Drive 580418 thank you.
  2. M

    rear mounts mc1/pre alpha / alignment issues after gimble bearing replacement

    After gimble bearing replacement, just can't seem to get to align. seeing some off left/right. and have some motion on the port rear side of the motor when removing allignment tool between tweaks/tests of allignment. I commented on another post, BT advised, to try loosening rear mounts and...
  3. M

    1981 MC1 endplay in prop shaft? replace lower unit SEI / Jasper / Thoughts??

    hello all, I have a 1981 120 with MC1. My lower I think is on its last legs, shifting no matter how much I adjust into reverse is getting bad, and it seems to me there is quite a bit of movement (end play? in and out on the prop shaft) From what I have read, rebuilding these lower units, is...
  4. M

    merc120 mc1 idle in gear excessive bubles?? too much to idle relief?

    Hi all, not the greatest video.. but does this seem to be excessive bubles for a mercruser 120 @ idle? When I get on plain, I see exhaust in propwash. Also when on muffs, put my hands up around the bellows and didn't feel any leaks, or see any breaches. Guru opinions solicited, thank you.
  5. M

    1981 MC-1 mercruiser 120 package 1981 four wins shift issues reverse intermittent

    1981 MC-1, I am having intermitent issues shifting into reverse. It works perfectly, or sometimes, it seems the throw is longer on the control, and it really fights going into reverse.. (grind/rattling). I have replaced the lower shift cable last year, boat is fresh water used, garage stored...
  6. M

    Yamaha 2002 8hp T8PLRA Fuel line Pump to Carb routeing.

    If anyone has a 2002 T8PLRA 8hp fourstroke I am looking for a reference for the routeing of the fuel line from the pump to the carb. Does the fuel line run between the electric choke control and the cylinder head, or around the outside of the intake and under the carb? I picture would be...
  7. M

    1981 mercruiser 120 Ignition advance seems to be sticking Conversion to electronic?

    Hi all. My ignition timing seems to be possibly hanging. After running WOT, nd bringing the boat back down, and to neutral, the idle is high.. after a little bit, it settles back down to 750 rpm. I think the 30 year old springs in the distributer are giving me a little heads up they are...
  8. M

    1981 MC1 Mercruiser 120 package replacement sterring cable NON power assist?

    Hi All, My steering is binding, I removed the link and its in the cable/rack assembly. I managed to get it loosened up with a ton of pb-blaster in both the rack end and the transom end of the cable, but, I want to replace it. I have a 1981 MC1 Mercruiser 120 package with no Power assist...
  9. M

    1981 mc1 mercruiser goes into forward fine reverse is an issue

    1981 Mercruiser 120 mc1 (mr?) outdrive . As stated in the topic header, goes into forward nicely, but clacks, doesn't lock going into reverse. I can pull the cable and it will lock into reverse, takes about 1/8" more pull. I attempted the adjustment procedure, lock into forward, chock the...
  10. M

    shift Lever tnut

    Hello All, I have a 1981 MC1 outdrive, on a 120 package, in a four winns marquis 170. Having shift problems/stalling going in and out of geer. found stripped/worn lower shift cable mount ( eye end/adjustable slot ) I am replacing the bolt with the nut attached on it top and bottom threaded...
  11. M

    1981 mercruiser 120 dwell cant get it below 60 WOT low RPMs

    hello all, I have a 1981 Mercruiser 120, I have replaced points, condensor, cap, roter, plugs and wires. When checking the dwell with a meeter, I am getting readings in the 60-63 range. the meeter has settings for 4, 6,8 cylander engines, I have it set on 4. I tried point gaps up to...
  12. M

    vhf handhelds Cobra, Uniden, Standard Horizon

    Hello all, Looking at handheld VHF radios. I want to buy an from an american company if at all possible. As far as I can tell, Uniden, Standard Horizon are both Japaneese. Midland and Cobra seem to be american companies. I am leaning toward Cobra HH330 anybody have any experience with tihs...
  13. M

    Filing cutting Trim anode fin Mercruiser MC1

    Hello All, Quick Question: Have a Merusier 120 coupled to an MC1 outdirve. just got a turningpoint 4 blade 19 pitch prop and it doesn't clear the trim tab/anode. Can I file/cut the fin and not cause havoc in the boats handling? Great lakes fresh water/trailered boat. Hull is a a 16'9"...
  14. M

    '81 mc120, high speed hot, screw back of impeller pump

    Hello all, I have an '81 MC120, with an MC-1 outdrive. I am experiencing highspeed overheats. I am wondering, if this rediculously high priced screw, could be my issue, when installing new impeller housing upper/lower entire kit, the screw I had, didn't seem to get real tight/snug.. i am...
  15. M

    highspeed overheat mercruiser 120 (1981) ???stern drive to transom plate hose???

    I have a mercruiser 120 , it overheats at high speeds. outdrive MC-1. I have done the impeller, the thermostat, tested with a clear tube from transom to engine, and replaced the riser/elbow. verified temps with IR temp gun/probe. Could the hose between the outdrive and the transom plate, be...
  16. M

    Help identifying stern drive/bellows/transom kit. 1981 mercruiser 120

    hello all, I have a 1981 mercruiser 120 io/ the stern drive S/N is 5804180 and transom plate s/n 5776812. 1) what model sterndrive unit is it (pre alpha.. alpha r/mr etc?) 2) What transom kit (Bellows, gimble bearing, cooling hose, etc) Would I use on it? 3) would a dry rot/small leak in...
  17. M

    distributer cap rubber stickers? Mercruiser 120 s/n 5828080

    Purchased a Sierra cap 18-5385. Mercruiser 120 s/n 5828080 It came, with two rubber sticker like things, sort of like rubber two way tape. I don't see anything like that on the old cap. Any ideas what these stickers/tape things might be for?
  18. M

    head bolts Head gasket replacement Mercruiser 120 s/n 5828080

    I have a Mercruiser 120 s/n 5828080. I am going to replace the head gasket because of some highspeed overheating. Are the head bolts supposed to be replaced when ever you pull the head, Are they stretch bolts?? Thank you.
  19. M

    Ignition timing marks mcm120 where?

    I have 1981 Mercruiser 120 s/n 5828080. I have found the timing scale mounted by the crank pully, but I see no harmonic balancer like on a car, and I can't seem to find any markings on the pully. I put a timing light on, and did not see any marking on the pully. What is the "normal" mark...
  20. M

    MCM 120 (1981) 2.5L running hot??

    Hello All, I have a MCM 120 Engine S/n 5804180 circa 1981 (2.5L) in a 16'9" Fourwinns marquois 170 (modified V fiberglass hull) Running in fresh water, water temp close to or above 70 best guess, and ambient air temp 94. I can putt and idle around the lake all day, and barely see over 155...
Top