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  1. brodie123

    new distributor interupt wiring

    Hi all; I installed a new HEI distributor and I'm trying to figure out the wiring for the interupt. On the dist, there is a positive batt terminal and a tack terminal. The ground is through the chassis. There is a 3 prong harness from the electronic ignition to the hei cap How do I wire the...
  2. brodie123

    New Distributor choice recommendations needed

    Hi all; I have a merc 250 inline 6 running a MSD dist (magnetic) with a MSD 6A ignition box but I've had some challenges with the 6A and it just completely died on me. I like the small amount of added performance of the 6A but need reliability on the water - easy to diagnose etc. I think I'm...
  3. brodie123

    Truck Selection Advice

    hi all; I'm looking for some advice on truck selection. We're looking at buying a Thompson 270 power boat, weighs 6500 lbs dry (according to survey). I like the F-150 4x4 with extended cab. We plan to launch this boat ourselves - the ramps are good where we go, concrete but typically wet -...
  4. brodie123

    timing

    Hi All; Can anyone help me identify the timing marks? I have not been able to find anything that matches what I have. Mercruiser 165 inline 6 4.1L i/O I really need to know what the marks are in order to get proper timing. I outlined the marks so they are easy to see. thx!
  5. brodie123

    Mercruiser 165 - missing and power loss

    Hi All; Mercruiser 165 - inline 6 - chev 250 Hi all, I'm about to do all the standard tests, but wanted to post my problem and what I found o far. We were out on the boat yesterday and she ran beautifully for the first hour - lots of power and an smooth. When running at about 1500 RPM, she...
  6. brodie123

    Matching boat size and vehicle

    We currently have a 19' boat which we love and are towing with a V6 Equinox. We would like to step up to a boat which can sleep 2 adults, 2 kids with washroom, kitchen etc. The trick is that we want to travel with the boat and launch from various locations. The Doral 29' is wonderful as it...
  7. brodie123

    Stumped - Won't turn over

    Mercruiser 165 inline 6 fire order: 1-5-3-6-2-4 --- checked compression: good and equal on all 6 Gas: fresh spark: tested on all 6 plugs: gaps checked wires: 2 yrs old Timing checked: 6 degress BTDC Ignition: MSD 6A + MSD coil --- power checked I de-winterized the boat and she started up like...
  8. brodie123

    MSD Tach Adapter

    I have a MSD 6A ignition box hooked up to a MSD tach adapter Mercruiser I/O 165 I have 3 tachs (2 spares) and cannot seem to be able to get them to work - reads "0" I got a hold of an osciliscope for testing Any advice at all before I stat on this tomorrow? Anyone had success with the...
  9. brodie123

    MSD Ignition - setting timing curve

    Mercruiser 165 I/O - inline 6 with MSD Ignition Box Base Timing: 8 degrees My distributor finally gave up the ghost and I have replaced it with a recommended MSD 8515 dist. This dist. comes with the option to change the springs and the advance limit The limiter comes at 21 degrees (plus base...
  10. brodie123

    Weird Timing Issues

    Hi Everyone; I have a 165HP Mercruiser I/O Inline 6. Timing calls for 6 degrees advance. I'm using 94 octane fuel minimum. The engine was rebuilt recently. Recently, I installed a MSD 6A for easier cold starts and hopefully a little better gas economy. It for sure helps her cold start...
  11. brodie123

    Mercruiser Shift Problems

    I've started having some shift problems where when I switch from forward or reverse into neutral, it either stays in gear for a prolonged time - or just stays in gear. When I momentarily ground my cutoff swith by pushing in the button - it momentarily stalls the engine - the gear goes into...
  12. brodie123

    Ignition Wiring

    Hi All; I need help identifying the wiring on my ignition coil and also what the terminal are on the ignition coil itself. I attached a pic showing what I have traced so far. This is on a mercruiser 250 chev inline 6 165 HP. Was upgraded to electronic ignition before I bought the boat...
  13. brodie123

    rough cold starts

    Quick question - my inline 6 250 chev w/4 barrel carb starts rough when cold - but tons of HP and starts/runs great when warmed up. (mercruiser i/o) Plugs are nice tan color - ignition looks good. I've been running high octane - think I will scale back to 94 or 91. Any advice on this?
  14. brodie123

    prop pitch + RPM

    Hi all; I have a mercruiser MCM 165 IO 1983 - rebuilt with some upgrades rated WOT is 3900-4300 I am running at 4500 RPM with a 13.5 19" pitch prop Should I go to 21? how many RPM change per pitch (rule of thumb) again? thx
  15. brodie123

    MDS ignition

    Hi all. Just wondering what your view on the MDS ignition system ver 6M - hot spark - marine version thx!
  16. brodie123

    vacuum advance?

    Hi all. I've upgraded my mercruiser mcm 165 inline 6 with a lot of help from this forum and is running great. To get some additional performance, I'm wondering about vacuum advance? On the carb, the vacuum nipple is high on the carb so I think that's ported vacuum instead of manifold vacuum...
  17. brodie123

    Hard Starts

    Hi all; I have a Mercruiser (1981) I/O inline 6 which I rebuilt 2 years ago. Running very well but hard to turnover alot. I'm going to move 1 of the 2 batteries (1 yr old) back to the stern shortening my power cable from 10+ feet down to 4. I'll re-check my timing to make sure it's not...
  18. brodie123

    Mercruiser Transom Rebuild

    hello all; I have completed a rebuild on my mercruiser transom +++. (went very well with assistance from here) The only thing I don't have is the torque settings for the 8 transom bolts. If anyone could pass those along or recommended torque if there is no 'official' setting??? Thanks in advance
  19. brodie123

    Mystery Steering Slack

    with help from the good folks here, I have my transom apart to get at the steering and do a few other maint items (seals etc) One of the main reasons I pulled the whole asmbly apart was a slack between the steering link rod and the bell housing. I expected the upper swivel shaft pin (correct...
  20. brodie123

    Mercruiser Steering/Gimble Repair

    I've pulled my engine to prepare for my repair on the steering shaft connected to the gimble housing where the bolt has worn causing slack in the steering. I've learned here that the entire outdrive mount needs to come apart (rather than doing the drill hole, tap the nut off trick). I'm...
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