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  1. jslu

    Corrrect Timing for 1987 35 HP Merc 0B177575

    Just curious about this. What should I expect to see when checking the timing on this motor @ 1000 RPM in forward gear and underway om the lake? I have done a lync and sync per the "Clams Canino" routine as suggested on this forum and feel confident that I am "right on" with the initial...
  2. jslu

    Ehaust Relief Ports

    I have 2 late1980's vintage 35 HP Merc outboards. The one currently installed on my boat runs perfect. The other one which I am currently troubleshooting by running in a large barrel of water is giving me problems; it stalls when shifting into gear.It does not do this on muffs.Timing...
  3. jslu

    Poor Idling 35 hp Merc

    1987 35 Hp Merc SN # 0B177575 My basic problem is that the motor does not operate reliability when shifting into gear while testing in a very large barrel of water. It mostly stalls. Here is what I have done so far; All replacement parts I have used are either new or known to be good from...
  4. jslu

    Charging Batteries During Off Boat Winter Storage

    Happy New Year All! I received an on board battery charger as a gift this Christmas which has an independent 2 battery capabililty. It seems to work very well as has charged my engine starting battery & trolling motor battery to full charge. It has the ability to remain connected to the...
  5. jslu

    Starter pinion gear disengaging

    I can't verify the actual serial no. of this 40 HP powerhead. but its parts make-up tells me it's probably around 1982. The 9 tooth starter pinion gear only stays engaged with the flywheel for about 3 seconds and then drops out. Power is still at the starter because it continues to spin...
  6. jslu

    Merc Powerhead Identification

    I have a 40 HP Merc powerhead that has been transplanted onto a 1987 35 Hp bottom assy as identified by the sticker on the transom bracket. Mechanically, it is an exact replacement. By looking at the 40 HP powerhead components, triangular fuel pump with water cooling lines passing through and...
  7. jslu

    Merc "Standard Commander" Control Box Identification

    Hello Forum Readers Can anyone give me more information about the Merc Control box shown in the attached photos? I have been able to identify it as "Standard Commander" Series. It has "turn key to start engine" feature and also has a push button on top (not turn key to choke) to energize the...
  8. jslu

    Is this oily film deposit normal ???

    1983 40 HP MERCURY, SERIAL NO. NOT KNOWN This motor has intermittent cooling water flow from pee hole. It ranges fron normal at times to no flow at all with steam eventually exiting from pee hole. Shutting off and waiting and restarting will return flow to normal for awhile and then returning...
  9. jslu

    Throttle and Shift Cables

    is it possible to remove the inner core from the outer covering of the throttle and shift cables in order to lubricate them ???. It seems like the cables i have slide with too much friction.
  10. jslu

    Commander Control Box Questions

    I recently made this E-bay purchase to fit to a 1987 35 Hp Merc. I have puzzled out the throttle and shift cable attachments but have not been able to actuate the "Throttle Only" (Cold Start) buttton. I can push it in somewhat but it does not allow the throttle to advance independently without...
  11. jslu

    35 hp mercury vs 40 hp mercury

    1987 35 HP MERC Serial No. 0B111943 The above serial no. appears on the transom bracket which I recently bought for cheap money, basically in good condition. I've kinda focused in on these 1980's vintage 35 Mercs as a way to enjoy my retirement by bringing them back to life with a very...
  12. jslu

    Pre load pin on top of driveshaft

    1987 MERCURY 35 HP Serial No. 0B177575 The pre load pin on the top of my drive shaft has been erroded by rust by approx 20%. My initial thought is that it would still be servicable considering the downward forces placed upon it. The spring is operative. How can I remove it to replace it if I...
  13. jslu

    Fuel pump issues

    1987 35 HP MERC SERIAL NO. 0B111943 The serial no. posted above would indicate model year 1987. However the power head exhibits a configuration used in 1986. Either a power head swap or early 1987 model with leftover 1986 parts from Merc. This serial no. is early in the model year by 1000+...
  14. jslu

    Starter Pinion Gear

    1987 Merc 35 HP SN# 111943, recently purchased. Per the serial no., this is a 1987 model year, and also per the serial no., an early build of that year, within the first 1200 units. My question is this: The starter pinion on this engine is a 9 tooth gear. According to all info (my Merc manual...
  15. jslu

    Fuel Pump Question

    1986 35 HP Mercury SN # 177575 I just recently rebuilt the fuel pump (square design) for this engine and while doing so I noticed a very small hole (approx .015 dia) in the inner housing near one of the plastic disc check valves. The hole is near the edge but definitely under the plastic disc...
  16. jslu

    Lync n' Sync, 1987 35 HP Merc

    SN #0B177575 Engine running (with 9 pitch prop) tests being done in a large barrel full of water. Previously set initial timing @3*BTDC WOT timing @ 21* BTDC Timing done per Forum procedure Spark easily jumps 7/16 gap when cranking. Compression 140 PSI each cylinder Engine starts and idles in...
  17. jslu

    Lower unit gear ratios

    Merc 35 HP, 1987, SN 177575 I know for a fact that the lower end gear ratio for this motor is 2:1 by turning the flywheel clockwise and observing the prop rotation. It is dead on at 2:1. I am considering a replacement lower unit form a 1989 or 1990 60 HP Merc and the gear ratio for this seems...
  18. jslu

    Alignment of shift rod and splined shift shaft to lower unit

    1987 MERC 35 HP SN #177596 I have taken apart and successfully re-assembled several of these lower units without any difficulty, but this time something different happened. As I returned the engine from the full tilt position to the down position, the part shown in the photos fell out from the...
  19. jslu

    Transom Mounting Holes for Tilt and Trim Engine

    Engine = 1989 35 HP Merc SN# 120583 Boat = 1990 Starcraft Select 150 When I originally purchased this boat two years ago, it had a 1990 60 HP Merc with 3 ram tilt and trim. At the point of purchase I knew the 60 Hp was trashed with broken center piston. As a replacement I opted for a 1987 35...
  20. jslu

    Fuel pump rebuild

    1989 Mercury, 35 HP, SN# 0C120583 This Merc has the "square type" fuel pump. I purchased a Merc rebuild kit, # 21-857005A, and proceeded until I discovered ambiguous instructions as to how to proceed. This has to do with the two check valves. In my factory Merc manual it shows each valve assy as...
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