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Recent content by judojim

  1. J

    115 Yamaha TLRP 2 stroke rough running. Needs tune up!

    I have a Yamaha 115 hp 2 stroke model 0115TLRP, (serial 6E5-L-320813), which starts up and idles, but it runs really rough with "sneezing/coughing" and smoke. This engine has 4 cylinders. Thinking it has something to do with fuel I removed and cleaned the carbs and blew out the jets, then...
  2. J

    Need instructions for removing/replacing governer on DD 671...

    On a Detroit Diesel In line 6-71 (natural) I need to replace the governor. The governor plate says SWVS (single weight variable speed). Assembly number: 5144138. Idle Range: 500-900 Drive Ration: 2:1 The engine numbers are 6A0334150 model 1063 7000. Does anyone have a set of instructions for...
  3. J

    Reconfigure Coolant piping from Exhaust Manifold to Oil Cooler

    Darn, I lost the whole reply just now and I'm too tired to try to retype it, so I'm going to try to attach some photos if the forum site will let me do so easily...so far so good. Notice that the oil cooler has three different hoses, (I am pointing to all three of them in the photos) two of...
  4. J

    Reconfigure Coolant piping from Exhaust Manifold to Oil Cooler

    Hello MarineEngine.com forum: I have 2 detroit 6-71's in a 42 ft Uniflite. Both of which were "marinized" with Johnson Towers coolant systems. However, the starboard engine had a couple of large hoses coming from an old Triton watermaker which has now been removed from the boat and I want to...
  5. J

    Mystery part on 6-71 Detroit: Please help me identify it.

    I have a mystery part sitting on the camshaft cover at the rear of each of my two Detroit 6-71's on my boat -- a 42 ft (1976) Uniflite Sportsfisher which was bought in rather poor condition. I've attached a photo of one of these mystery parts. Can anyone tell me more about what this part...
  6. J

    What sort of device is a Securus L-200??

    I'm posting in the Boat Electrical Systems sub forum because I have discovered a small electrical device on this my newly acquired 42 ft Uniflite Sportfisher.* I am beginning the process of upgrading the entire electrical system because this old boat, built in 1976, had many electrical...
  7. J

    why two sensors on detroit 6-71 fuel filter?

    I have a detroit diesel 6-71 and I'm wondering why this engine has two different sensor on the fuel filter. I've attached a foto showing these two sensors, so if anyone knows what these sensors are used for, I would appreciate it. Thanks, jim
  8. J

    What is this part?

    Hello, I've got a 6-71 detroit, 4 valve in a 42' Uniflite and I am in the process of replacing the head. I want to clean and paint the engine, but while doing so, I ran across this strange looking part. The service manual really doesn't describe it, or at least I couldn't find it in the 960...
  9. J

    How to precisely identify 1971 Detroit 6-71's

    Ok Marv, Here's a couple of photos of the engines. FYI, I found out that the transmissions are made by Twin Disc, and that they use motor oil rather than transmission fluid. I'm still wondering about how the cooling system and exhaust work. Surely, these components will need some maintenance...
  10. J

    How to precisely identify 1971 Detroit 6-71's

    I have just bought a 1978 Uniflite fishing boat that has two Detroit 6-71 and I need to be able to identify exactly what I have. Apparently, there are several types and it would be nice to know what I have. I'm pretty sure these are 2 stroke engines and I'm pretty sure they have Roots blowers...
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