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  1. DanOnTheBoat

    1999 4.3L...

    My only suspicion is why was the oil good before and after I ran the boat, but after a few days I checked again and it was hazy/milky like in the picture above... thats whats getting to me. Not sure if it just created more condensation and didnt get hot enough when it was started om the day I...
  2. DanOnTheBoat

    1999 4.3L...

    Thanks for the replies, one thing I noticed is that before and after running the engine on muffs, the oil actually stayed looking the same and pretty clean. It only seemed to look milkier after sitting untouched for about 4–5 days afterwards... Also, what are the “good” replacement manifold...
  3. DanOnTheBoat

    1999 4.3L...

    Forgot to mention, I have the batwing style manifolds. Could they be the issue of water going to oil? I heard some things about them and how they aren't the greatest... Engine runs flawlessly, starts right up with no hiccups and idles really well at a steady 600-700rpm on a cold engine.
  4. DanOnTheBoat

    1999 4.3L...

    Hello, so I bought a boat... its a pretty nice 1999 bayliner 1850ss with a 4.3L Vortec in it. Last owner owned it for about 13 years and always maintained it, always winterized it, etc... the boat runs great, the owner fired it up and it ran really well. Was holding very steady 600-700rpms on a...
  5. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Thanks Lou, I've done the timing on it, set it to 2° ATDC as it said on the carburator air filter(Before doing timing, I checked the mark on the crank wheel and it was WAY back my guess about 25° BTDC at idle...) Ive also set the idle RPM to about +/- 750RPM. I than plugged the wires I bypassed...
  6. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Thanks for the advice ESG, will do.
  7. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Hello all my fellow boaters! Excuse my absence, got caught up with school work... Im sure you guys are all wondering if I got the boat to run... or well explode lol. Im happy to announce that its all running! I got it all running and dialed in on Saturday. Worked all day on it but it payed off...
  8. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Makes sense. When Im on the compression stroke both valves will be on the same level? Also what if I didnt rotate the engine at all when it was taken apart, can I just adjust them now? Or its a must to have every cylinder ATDC compression stroke? Update picture almost there🙏
  9. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Okay so in short, everytime each cylinder is ATDC I adjust both intake and exhaust for that cylinder
  10. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    I went to the store and got the Permatex High Temperature Thread Sealant just to be safe. Already installed the head, hopefully I get it all done today. I have a few questions about the pushrods and how to adjust them. Ive watched countless videos online, and a lot of people do it different...
  11. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Question about head bolts. So I think I'm going to reuse mine, they dont look stretched or rusted. I also showed the machine shop mechanic, where I had my head resurfaced and he said they are good to be reused. Also said they reuse head bolts all the time when rebuilding engines. Now, about the...
  12. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    I've noticed that as well and I'm not sure if that's OEM or not... However I just got in the new gasket kit and I have som questions and posibble concerns... I took a side by side picture, and I've also placed the head gasket on the block. There are 4 small(circled in RED), they seem pretty...
  13. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    LOL. Well I looked at it i didnt just take it off the block, I still inspected it it and took a look at all yhr valves which looked great to me, which they were. But yeah I mean I assume everybody took their heads to thr machine shop... I've done the diagram yes with the measurements I got. And...
  14. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Thanks a lot for all the good info and support guys!! A lot to reply to so I'll try to do it all in one post lol. So I got a 90* carpenters square and I measured the block in every single way possible. Sideways, vertically, left, right, across, etc. 0.06mm was the lowest that would not go...
  15. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Little side note. I did find a set of bolts for a pretty good price compared to the other ones I found. Im guessing these should work and it doesnt matter what "color" they are? https://marineengines4less.com/head-bolt-set-gm-2-5l-3-0l-4-cyl-marine-engines-set-of-10-head-bolts/
  16. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Lol thanks, tried to be as neat as I could. Labbeled absolutely every sinlge wire. That makes sense thanks a lot. I've cleaned the block with acetone, and scrapped away any debris and wiped the top of block and cylinder walls and pistons with WD40 just so it doesn't rust. I've also checked to...
  17. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    I actually did that while I was cleaning the bolt threads, but with a tooth pick just so I dont damage anything around... But yeah there is absolutely nothing under the head bolts, it goes straight through to the block cooling system. Which makes me wonder if I should put something on the bolts...
  18. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Perfect thanks! This is what the block looks like in between the two cylinders. Not sure how good you can see it but I'm assuming this is what fire slotted means?
  19. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    Hey guys, so just finished taking it all apart. Here are some pictures. Thankfully the culprit is the head gasket lol. Also I inserted 2 pictures of the head bolts. Not sure how visible or what sort of inspection they need. I cleaned them up with acetone and they don't seem to have any rust or...
  20. DanOnTheBoat

    Mercruiser Setting Timing on 3.0L

    I heard Fel-Pro is mainly focused on automotive parts. I ordered myself a full MANHLE gasket kit. You guys think this one is good? https://www.amazon.ca/dp/B007ZJKGP8?ref=ppx_yo2ov_dt_b_fed_asin_title
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