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  1. JJBoatr

    1990 OMC 2.3l vs 3.0l Drive Ratio Question

    Morning Y’all, My brother recently acquired a nice Four Winns 170 Freedom with an OMC 2.3Lthat had a roached upper gear set. He replaced the entire lower unit with a small case driv from a boat equipped with a 3.0L. His boat is running great except for one thing...he cannot reach...
  2. JJBoatr

    63' Evinrude 40hp (40353D) Steam Trail?

    Morning, I recently got my 40hp running and it runs great. My question is; Is it normal for this motor to have a steam trail coming out of the upper exhaust outlet? It has the quiet exhaust housing. I've also noticed the exhaust manifold cover gets warmer than I am used too on my 22ci...
  3. JJBoatr

    63' Evinrude 40 (40353D) Powerhead Assembly

    Hey all, I've got my motor torn down to replace the crank, bad upper seal allowed the upper bearing to corrode which pitted the crank end beyond repair. I don't have a manual since this was an unexpected project so I was hoping someone could help me out with the following torque specs...
  4. JJBoatr

    1963 Evinrude 40hp 40353D info

    Hey all, I just picked up a 63' 40hp for a great price...free! I'm going to go through and do the standard refurb steps; points, plug wires, fuel & vacuum lines etc. before I take it out. I'm very familiar with the smaller 22ci OMC motors but this is my first "big twin". My question is...
  5. JJBoatr

    14' aluminum Run-About Transom Height

    Mornin all, Working on a 67' Creatliner Commodore Speedster with an Evinrude 25352A 25hp long shaft outboard. My question is; what height should my transom be? When I first got the boat I didn't have a long shaft kit on my motor so I cut the transom down to 15". I have since acquired a...
  6. JJBoatr

    Surge Brake to Electric Conversion

    I am converting my braking system from surge to electric and it seams this can be a highly debated topic. One universal opinion I've seen is don't use electric brakes in salt water...check...I'm a freshwater only fella. Another seemingly less informed opinion I've seen is "electricity...
  7. JJBoatr

    73' Evinrude 25 HP (25352A) Idle Adjustment

    Hey all, I recently rebuilt the carb on my 73' Rude 25hp. It runs how it always did, unstable idle, slight burble when you punch the throttle to get on plain. Is there a "zero" starting point for setting idle mixture and syncing the carb to the timing advance? I've chased this erratic...
  8. JJBoatr

    Mercury 25hp G158531 info

    Hey all, Tomorrow I am going to pick up a small fishing boat with a 95' Mercury G158531 25hp motor on it. I'm going to go through it and bring maintenance items up to speed. The motor appears to be in pretty good condition except it hasn't been run in 3 years. All of that aside I would...
  9. JJBoatr

    73' Evinrude 25hp Model# 25352A

    Hey all, Wondering if anyone has any tips for setting points on this engine to achieve a little better performance. All components are new which include ignition coils, points and booster coil. I set the points and it runs OK but I have heard there are more precise methods for setting...
  10. JJBoatr

    OMC Cobra Lower Unit Will Not Stay in the Up Position

    Tech info...1992 Four Winns, 190 Horizon, OMC Cobra 5.0/HO Ford(502APRAMK), Volvo SX style trim pump. Bought the boat knowing that the starboard trim cylinder had a leak. Rebuilt both cylinders with genuine BRP seal kits. I thought this would fix the issue but it did not. The manual relief...
  11. JJBoatr

    Mercruiser 5.0L Spark Knock Over 4,000 RPM

    Hey All, What I'm working on is a 1990 Thompson Cutlass 195 powered by a 2 barrell 5.0/Alpha Gen I, and the base timing is set at 8 degrees BTDC per the spec. I just ran the boat on vacation for 11 days straight with zero problems except that I would get what seemed to be a random spark knock...
  12. JJBoatr

    Mercruiser Alpha 1 Gen 1 (1.47ratio) Milky Gear Oil

    Hey all, I changed the impellar+upper housing a week ago and after inspection and recommendation from a marine mechanic I re-used the lower housing but replaced the big o-ring on the bottom. Now after running it for only about 25mins on the boots my gear oil is milky again:mad:. I just...
  13. JJBoatr

    1990 Thompson Cutlass 195 info

    Hey all, Just looking to get any information I can about my 1990 Thompson Cutlass 195 Open Bow(Mercruiser 5.0+Alpha 1). I know the company stopped making boats around 96'ish, but I haven't been able to find any info about the newer models anywhere. It's like they didn't exist. Some people...
  14. JJBoatr

    Mercruiser 5.0 Alpha 1 Power Steering Chatter at the ram

    Hello all, I'm new forums and I hope I don't screw this up too bad so here goes. As stated in the title, the power steering on my Mercruiser 5.0 has a chatter at the steering ram if you change direction quickly or get within a half turn of the wheel from the stop in either direction. I have...
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