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  1. J

    Overheating Mystery!

    My 1972 Chrysler 35hp has been running perfect until last week. I took it out, got the impeller intake clogged and burned up the impeller. IT overheated really bad! Smoking like a chimney. I replaced the impeller and now it runs like crap. It seems like it is missing. It will run but it...
  2. J

    Aluminum Chunks around impeller

    I had a pretty bad overheat this past weekend. I drifted trhough some shallow grassy water and picked up alot of grass around the prop. Ended up clogging the intake for the impeller and overheating. Ruined the impeller too. When I went to change the impeller, I noticed a small pile of...
  3. J

    Running on 1 Cylinder

    I have a 1972 20hp mercury pull start. The motor will only run on 1 cylinder at a time. The left coil is wired to the top cylinder and the right coil to the bottom cylinder. The top cylinder works fine. The bottom cylinder will also work if I connect it to the left coil. But only one...
  4. J

    No Fire! Please help...

    1972 20hp Mercury Thunderbolt ignition (pull start) engine is firing only on the top cylinder. I've swapped the coil wires to check for a bad coil and that's not the problem. Both coils are good. Spark plugs and wires are good also. I tried pulling the flywheel and trace the bad wire(green)down...
  5. J

    Help with no fire!

    1972 20hp Mercury Thunderbolt ignition (pull start) engine is firing only on the top cylinder. I've swapped the coil wires to check for a bad coil and that's not the problem. Both coils are good. Spark plugs and wires are good also. I tried pulling the flywheel and trace the bad wire(green)down...
  6. J

    20hp Mercury firing on one cylinder

    1972 20hp Mercury Thunderbolt ignition (pull start) engine is firing only on the top cylinder. I've swapped the coil wires to check for a bad coil and that's not the problem. Both coils are good. Spark plugs and wires are good also. I tried pulling the flywheel and trace the bad...
  7. J

    Chrysler 354HC Starter

    I have a bad starter on my 35hp. How much does is usally cost to have one rebuilt by someone? Also, what is the part number for a replacement?
  8. J

    Force 2400

    I just bought a froce 2400 trolling motor off of ebay. It is a 12 volt motor. Will 10 gauge wire be sufficient to run from the motor to the battery which is 12 feet back in the boat?
  9. J

    Force 2400

    I just bought a froce 2400 trolling motor off of ebay. It is a 12 volt motor. Will 10 gauge wire be sufficient to run from the motor to the battery which is 12 feet back in the boat?
  10. J

    20hp Mercury with no neutral?

    Just got a 1972 20hp model 200 mercury pull start, tiller steer motor and it doesn't seem to have a neutral. When you crank it it's always in gear. Is this right? The tiller handle just has start, shift range?, and forward on it. Also, don't think the plug wires are on the right plugs, which...
  11. J

    Slipping and Thud

    My 35hp chrysler 354hc is acting up. <br />Symptoms:<br />works fine in reverse, but when in forward gear it thuds violently every few seconds at low and high speeds. If I throttle it up it will eventually fall completely out of gear and rev out of control and after a few seconds the rpms will...
  12. J

    Lower Unit Compatability

    I have a 1972 Chrysler 354HC. Will a 1988 50hp Force Lower Unit fit my motor? If not, what years and hp models will fit my motor?
  13. J

    Thermostat - No Grommet

    What will happen if I put in a thermostat without the grommet in my 1972 35hp chrysler? Will it function properly without the grommet. I have the gasket just not the grommet.
  14. J

    Thermostat?????????

    My '72 35hp chrysler did not have a thermostat in it when I bought it, so I ordered a new one. The manual says it should have a grommet and a thermostat cover gasket. Neither one is there, and I don't know where to find these parts. Is there any way to rig something to work effectively or are...
  15. J

    Tiny Tach for a 35hp chrysler

    I want to add a tiny tach to my 1972 35hp chrysler so I can monitor the rpm's with a new prop. I'm not sure which model I need though. Has anyone added one of these? Also, I am running a 10-3/8 X 11-1/2 prop. I want to move to a 10 - 3/8 X X 10. Has anyone done this and can give me a report...
  16. J

    Unknown Holes in Lower Unit

    What are the holes that I have labeled in this pic? I removed the screws from them and now they won't tighten back up. They take in water and leak oil. The screws don't seem to be stripped, but they just won't tighten back up. What do I do?<br />
  17. J

    Bent Impeller Vanes?

    When installing a new impeller, should the vanes have to be bent sideways to make it fit into the water pump housing, and if so which direction should they be bent?
  18. J

    Chrysler 354HC

    I need to find out what impeller my engine takes. I ordered sierra part 3084, which is what all the parts websites recommend, but it did not fit the water pump. Which imepller do I need? The engine is a 354HC 35hp.
  19. J

    Overheating Question

    I just replaced the impeller on my 1972 35hp chrysler model 354HC, due to a pretty bad overheat. The impeller was ground to bits. I ordered the impeller (sierra part #3084) that supposedly fits my motor. The old impeller had 6 fins, and the new impeller has 10. The new impeller's fins were...
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