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  1. 59Thompson

    '71 Mercruiser 165hp I6 oil pressure sender thread size?

    Tks! Project for tomorrow. I'll post what I learn.
  2. 59Thompson

    '71 Mercruiser 165hp I6 oil pressure sender thread size?

    Hello, Am planning to remove the oil pressure sender and use a mechanical gauge to test the oil pressure. Looking for data on the thread size for the adapter I will need. Thanks in advance for your assistance.
  3. 59Thompson

    Stuck Defective Grease Fitting on Lower Unit

    The original grease fitting ball is buggered up and rusted. I have a SS replacement fitting. Looking for tips on removing, I'm thinking some Kroil to soak, then some heat and then using a grease fitting removal combination tool with its wrench and extractor and tap if needed. Thanks in advance...
  4. 59Thompson

    Replacement window edge gasket material source?

    Hello, I'm looking for the above for a 1971 Thunderbird Comanche and not finding much luck. TIA for any you can provide especially if you have used them in the past.
  5. 59Thompson

    Looking for a 1971 catalog

    Hi JB. White elephant located and enroute. Its been a bit of search but I did find an 8 page Thunderbird catalog that I'll have in hand soon from ebay that I can post as a sticky. Is there a way to do that here or just better to put on the Fiberglassics site.
  6. 59Thompson

    1971 165HP I6 Factory Circuit Breaker Installation Guidance

    Thanks!
  7. 59Thompson

    1971 165HP I6 Factory Circuit Breaker Installation Guidance

    Need advice on where the mount and the red leads, look like 8 gauge should be connected to as I don't see any thing that appears wired around on my Thunderbird Comanche. I finally found one and want to install it before hitting the water.
  8. 59Thompson

    1971 165HP outdrive bottom grease fitting removal

    The original grease fitting is buggered up and rusted. I have an SS replacement. Looking for tips on removing, I'm thinking some Kroil to soak, then some heat and then using a grease fitting removal combination tool with its wrench and extractor and tap if needed.
  9. 59Thompson

    Need assistance to identify maker

    Hi Jim, In Ohio, it can be registered as a home built or even by brand without a VIN or titled. The feature that makes it unique is the use of spade 3/4" spade bolts for bunk and roller support as pictured hence I thought one of the seasoned sailors here might recognize the brand. I'm...
  10. 59Thompson

    Need assistance to identify maker

    Good morning. Am trying to identify the manufacturer of this tubular, welded, tandem trailer I purchased via bill of sale here in Ohio. It uses 3/4" spade bolts to support both the rollers and bunks. I've blasted the 13" wheels and will be painting them next. Thanks in advance for your help...
  11. 59Thompson

    1971 Mercruiser I-6 165 HP Tilt Trim Braided Hose Replacement

    Tks!
  12. 59Thompson

    1971 Mercruiser I-6 165 HP Tilt Trim Braided Hose Replacement

    Tks!
  13. 59Thompson

    1971 Mercruiser I-6 165 HP Tilt Trim Braided Hose Replacement

    Good morning. Isolated the small drip to one of the four equal length external braided lines and purchased a factory replacement and a 3/8 hex line wrench. The drive is in the full down position. Is this under pressure when down or can I just put a bucket underneath to catch any drips while i...
  14. 59Thompson

    Engine Block heater for 71 Mercruiser 165 (GM 250 CID) ?

    Any advantage to installing a block heater for those transitional times when you still want to be on the water in a dock kept boat but the nights can drop into the thirties? Has anyone done this and was it worthwhile in your opinion? Thanks in advance for your input.
  15. 59Thompson

    1971 165HP Starboard cylinder line drip in use How to diagnose and repair

    Am getting a drip when using tilt/trim. Looks like it might be within the braided hose at the cylinder end or loose fitting. Should I try tightening with line wrench or just replace? Age unknown. Thanks in advance for your recommendation.
  16. 59Thompson

    Lubricant replacement for trim pump 1971 Mercruiser 165

    Hi. Looking to suction out and refill the trim pump's aged fluid on this unit. Says 20 wt oil, is that the appropriate fluid to use or what is now recommended? Has a slight occasional drip into bilge didn't know if adding a sealer like a lucas product would plump up aged seals. Thanks for your...
  17. 59Thompson

    Trim Limit Wiring Issues 1971 Mercruiser 165

    New to me boat 71 Thunderbird Comanche. Looks like the wires to a trim limit switch. Both toasted and brittle going into the plate. The trim sender and gauge work. Questions: Can I just leave this unplugged, tape up the clean plugs and operate cautiously i.e. don't trim out too far and then...
  18. 59Thompson

    Mercruiser 165 Starter Fuse and Engine Circuit Breaker Help

    1971 Mercruiser 165, the operator manual and parts book show a 40 amp circuit breaker on a plate for the engine and big fuse for the starter. But they don't show any wiring information or details of how to hook them up. I have the wiring diagram, attached here, but I don't see them on it...
  19. 59Thompson

    Looking for a 1971 catalog

    Hello all. I'm a new owner of a 1971 Comanche Dlx with a Mercruiser 165 and am looking for a factory catalog for that year or close to it that might have construction information, specifications, etc. Have found one yet on ebay or as a pdf from a boating website. Thanks for any information...
  20. 59Thompson

    Cabled magnesium fresh water anode for 1971 Mercruiser 165 MC-1 3084453

    New to me '71 Thunderbird Comanche, 19' fiberglass cathedral hull, with above setup, well maintained. Will be docked in fresh water. I'm not seeing any anodes or kits for same other than the trim tab. Have seen the SS clamp-on, SS cabled magnesium 2lb anode and wonder who has experience with...
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