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  1. Replies
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    Is the plastic screen in water pick up in it's...

    Is the plastic screen in water pick up in it's proper place? If loose, water pump pressure will pull it up and close off water pick up.
  2. Replies
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    .280" with steel. .300 with dual stage fiber....

    .280" with steel. .300 with dual stage fiber. Measured from top of bottom reed.
  3. Replies
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    Just a FYI. The 1989 and 1990 EP nationals were...

    Just a FYI. The 1989 and 1990 EP nationals were won with a motor similar to the one pictured. The winning motor did not have the exhaust holes as shown, others in the race did have them.
  4. Replies
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    National's results:

    Unbelievable and unacceptable that the results from the OPC Nationals are still not posted on the APBA website.
    Tell me again what the price tag was to get updated to the modern world.
  5. Replies
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    3,343

    Appears you about 3" too deep. When you raise the...

    Appears you about 3" too deep. When you raise the motor enough to stop the transom over wash you will need a different prop.
  6. Replies
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    3,912

    The only gear ratio for 3 cylinder is 15:28. The...

    The only gear ratio for 3 cylinder is 15:28. The 12:29 is for 2 cylinder and will last about as long as it took me to write this if used under a good 3 cylinder power head. The SST 60 clutch is not...
  7. Replies
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    2,736

    I would recommend you get the oats before they go...

    I would recommend you get the oats before they go through the horse. In other words, read your rule book. It's there in very clear language.
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    1,844

    Without controls it's useless unless someone...

    Without controls it's useless unless someone needs it for parts.
  9. Replies
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    4,666

    Surface gap plugs

    I would not use surface gap plugs until the cooling problem is corrected. The center electrode usually ends up in the combustion chamber instead of in the plug body. Don't know why you chose the lost...
  10. Replies
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    1,235

    The timing shown in your manual is probably...

    The timing shown in your manual is probably taking today's so called gas into consideration.
  11. Replies
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    1,235

    If my old memory is close, it would be between...

    If my old memory is close, it would be between 1969 and 1971. The timing decal is correct for that motor. If you can post a few pictures.
  12. Replies
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    Usually caused by overtightening of plug....

    Usually caused by overtightening of plug. Sometimes by plug not being rated for temp or compression that is being exposed too.
  13. Replies
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    8,425

    Idle Problem

    First off I agree with Austin that these motors did exist from Mercury. I would think the problem you are having with the idle is the stator. You said you have a manual so do a resistance check. I'm...
  14. Thread: Trenton Race

    by Popa Sam
    Replies
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    11,964

    Money:

    I agree this issue is killing the sport. But itsnot just the 120/200 issue. As we all know the price of everything has risen steadily. Everything that is except prize money that seems to keep getting...
  15. Replies
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    Larry Davis of Hinesville, Georgia held the NOA...

    Larry Davis of Hinesville, Georgia held the NOA record in the 40-70 V class with a speed just over 86 mph. He was running a 13' Critchfield with 49 cu in three cylinder OMC. He was on BRF at one time.
  16. Thread: Pittsburgh??

    by Popa Sam
    Replies
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    1,552

    120 was Rinker, Floyd, Reno. 200 was Proffit,...

    120 was Rinker, Floyd, Reno. 200 was Proffit, Lick, D'nick.
  17. Replies
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    My guess as to why it didn't pass inspection...

    My guess as to why it didn't pass inspection would be that it was not designed or sold by someone in "high position" with APBA. That's very important when safety is an issue.
  18. Replies
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    Just read my statement again. Then look at the...

    Just read my statement again. Then look at the pictures. They have had the info corrected since my post.
  19. Replies
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    7,767

    The rear of the block has webbing between outer...

    The rear of the block has webbing between outer head bolt hole and exhaust side on the lost foam. The permanent cast does not have it. Look at the pictures that were posted earlier in this thread.
  20. Replies
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    The permanent cast doesn't have glue lines to...

    The permanent cast doesn't have glue lines to restrict and disturb flow. It also has higher crankcase pressure.
  21. Replies
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    7,767

    If building a performance motor, you want the...

    If building a performance motor, you want the permanent cast rather than the lost foam.
  22. Replies
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    7,767

    Reversed info

    This info is reversed. The block with the painted head is a permanent cast and the one with the unpainted head is lost foam cast.

    The first year for the 56 was 1986 and it was permanent cast....
  23. Replies
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    Blow out!!

    Before making any of the changes recommended you need to find another place to run. If you experience a blow out running in this location, those bridge pilings are gonna hurt.
  24. Replies
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    I would suggest you start with a new compression...

    I would suggest you start with a new compression guage. I've never known a motor with a problem to have compression that even.
  25. Replies
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    OMC Carb main jets??

    Does anyone know what carbs the "A" and "B" series main jets fit? I have several in my jet box and don't remember what they are for.
  26. Replies
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    If you are referring to changing 2 and 3 cylinder...

    If you are referring to changing 2 and 3 cylinder gears..the only difference is the way the forward gear bearing is supported. You have to change the forward bearing carrier with the gears. 2...
  27. Replies
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    1,351

    All SST60 gearcases came with the flat drive key....

    All SST60 gearcases came with the flat drive key. The woodruff style was used on 2 and 3 cylinder shafts in the 70's. All later shafts are flat key design. 2 and 3 cylinder gearcase housings are the...
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    [QUOTE=marchettih2o;116752] But those props are...

    [QUOTE=marchettih2o;116752] But those props are few and far between, just look at all the postings on this website for 12-12 1/2 X 23-24" props folks are trying to hunt down. Not and easy task since...
  29. Replies
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    In the mid 1970's Merc made this same change, or...

    In the mid 1970's Merc made this same change, or maybe the reverse of it, to their 3 cylinder's and changed the horsepower rating from 65 to 70. I don't remember which way it was changed. Other...
  30. Thread: Bolt size

    by Popa Sam
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    1,255

    OEM bolts were 1/4-28 with 1/4 12 point head.

    OEM bolts were 1/4-28 with 1/4 12 point head.
  31. Thread: ssm tools

    by Popa Sam
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    Appear to be SSM VI shim guages and bearing cup...

    Appear to be SSM VI shim guages and bearing cup installer for rear propshaft bearing.
  32. Replies
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    75hp 1975 is a 49 cu in. 1989 70 is a 56 cu in....

    75hp 1975 is a 49 cu in. 1989 70 is a 56 cu in. The 1989 is a much better motor.
  33. You are correct on the gear ratio's. The 1.64 was...

    You are correct on the gear ratio's. The 1.64 was on the early 3 cylinder 65 hp motors that came out in 1972. They were poor performing motors. By switching to a 2:1 unit from a 50 hp of the same...
  34. Replies
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    Sticky: Poor excuse for an inspector:

    If an inspector made his decision on a technical matter based on weather someone would quit racing or not, he was a poor excuse for an inspector!!
  35. Replies
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    The 1987 70hp is a permanment cast 56 cu in...

    The 1987 70hp is a permanment cast 56 cu in bridged exhaust motor. It should be a better motor all around than the 60 which is a oval port motor. I've never played with the exhaust tube length in a...
  36. Thread: 60sst

    by Popa Sam
    Replies
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    2,166

    Splines not a match:

    That's what I'm saying. The splines in the 60 crankshaft and the splines on the other driveshafts you ask about are not matches.
  37. Thread: 60sst

    by Popa Sam
    Replies
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    2,166

    No

    Different crankshaft splines.
  38. Thread: SST60 Specs

    by Popa Sam
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    6,633

    No. I never tried the plastic tops.

    No. I never tried the plastic tops.
  39. Thread: SST60 Specs

    by Popa Sam
    Replies
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    6,633

    The biggest improvement in the cooling was moving...

    The biggest improvement in the cooling was moving the tell-tale outlet to the top of the block rather than the side. It allowed steam a place to escape. Always use a 6 blade impeller rather than the...
  40. Thread: SST60 Specs

    by Popa Sam
    Replies
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    6,633

    SST60 spec sheet can be found on opcrace.com...

    SST60 spec sheet can be found on opcrace.com website. The permanent mold cast blocks are preferred for mod motors. They were found on 1986 and 1987 70 hp motors. They are not legal for SST60. The...
  41. Replies
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    Have you tried choking the carbs individually to...

    Have you tried choking the carbs individually to see if maybe there is only one that's causing the problem? If it's all three then I don't think carbs are the problem unless it's the old style carbs...
  42. Replies
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    35,007

    Sticky: The red boat that Rusty had for APBA i don't...

    The red boat that Rusty had for APBA i don't think was the same as the white one.Sam did you get that boat or just the motor, if you got it you may know more about it. Thoese were some good...
  43. Replies
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    Not true:

    There were many 20" 75's built.
  44. Replies
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    Ron, I agree totally with your statements about...

    Ron, I agree totally with your statements about ABPA. Boat racing will never make it to the next level, or exist as it is, as long as ABPA in it's current form is involved.

    Another good example...
  45. Thread: Merc 650xs

    by Popa Sam
    Replies
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    6,497

    [....................................................

    [........................................................................................................................................
  46. Thread: Merc 650xs

    by Popa Sam
    Replies
    18
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    6,497

    I don't think the 650xs was ever approved as a...

    I don't think the 650xs was ever approved as a SE/FE motor by APBA. I don't remember why, maybe because it was advertised as a high performance racing motor. I know during that period there were a...
  47. Thread: Merc 650xs

    by Popa Sam
    Replies
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    6,497

    Merc 650xs

    I ran across this in some old papers and thought it may answer some questions that I've heard about these motors. Mainly when they were introduced.
  48. Replies
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    If it is an ignition breakdown, first try...

    If it is an ignition breakdown, first try disconnecting the black/yellow wire from the power pack. That will eliminate the kill switches and wires. If you still have the problem, change the power...
  49. Replies
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    Sticky: If you are referring to the exhaust ports, those...

    If you are referring to the exhaust ports, those are compression relief slots to make the manual start motors easier to pull.
  50. Replies
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    Optimax Specs

    This is the original from 2000:
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