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  1. P

    Popped through the intake.

    I will also add I've been testing some of the props I have on hand and thought I had a problem the other day. Trying to hit wide open I found it seemed like it did the same thing but I backed down so quick I didn't want to prove it. After doing a little research it seems the thunderbolt 5 had a...
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    Popped through the intake.

    So, I finally got around to checking everything. No water in separator, no other glaring issues however I did find out that the choke was staying on longer than it should. Like it would choke for 2-3 minutes on a 70 degree day. So I readjusted that and suspect that could've been the issue. It...
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    89 Horizon 180 with stock 4.3 upgrade questions

    I'm going to take a WAG and say the front engine mounts aren't going to end up in the correct spot...
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    Popped through the intake.

    That is the one I reference as well. Which is why I say it's pretty good all things considered.
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    Popped through the intake.

    To me, considering a fresh rebuild with basically no idle, 1,3,5 look perfect. 2,4,6 look slightly lean.
  6. P

    Popped through the intake.

    I haven't gotten to pulling the water Separator as I'm out of town but I did pull the plugs before I left. Oil looked clean but it was hard to tell. Tray got wet in the bilge as I was waiting for the adapter for my quick drain and dipstick to arrive so it was just a plug. I plan to run it a...
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    Popped through the intake.

    I'll pull it and check. But I will go out on a limb and say that's probably not going to be the issue. But it's cheap enough and won't hurt and I'll be in there anyway. I'll report back.
  8. P

    Popped through the intake.

    All three of us heard it, dad and my buddy would describe it as they thought I clipped something in the water but it originated from inside the boat.... I almost thought it was detonation. Picture tapping a wrench on a piece of hard plastic or something once or twice. I wasn't running it...
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    Popped through the intake.

    Got about 12 hours on it between yesterday and today... I had a noise. Not sure what it was and couldn't duplicate it. I'm putting the celebration on hold...
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    Popped through the intake.

    Still seeing a little condensation through the breathers but I'm not getting anything in the oil. Put about 6 hours on it yesterday. Running fantastic. I kind of made the assumption that 3/4 throttle is ~3/4 RPM so I was just doing sweeps and varying speed from idle up to around 3800 RPM and...
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    Popped through the intake.

    Thank you. I didn't run it terribly long on the trailer... basically brought it up to 1500 of so to warm up then set timing. It was pretty close for me stabbing it in at 1am. Think base timing ended up being about zero degrees. Before adjusting the timing I was getting a little burbling but...
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    Popped through the intake.

    She's alive for those curious and following along at home... Hopefully doing the sea trial tomorrow.
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    P.S.A. . . . SAE J2807 Towing capacity spec's

    It's actually a decent standard all things considered. We had 2 company trucks from GM, one before and one after they made the switch. IIRC it dropped about 300lbs by adhering to the standard. They were same chassis/generation and engine configurations other than one being rated for j2807 and...
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    Popped through the intake.

    Engine is ready for pickup. They honored the original quote too.
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    Need Advice on Towing Performance

    I agree with swapping props... Mine had a 3.0l in it forever. While not the best performer... and loud... it did it. It would do it with a boat full of people, and there were a few outings where while under weight, I really didn't think it would plane. It wasn't happy, but it did it. Every time...
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    Carburetor question

    My fix was 3 flat roller cam lobes and a couple cylinder bores and valves that looked like the surface of the moon. :( Glad it was something simple for you!
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    Exhaust Manifold Question

    I priced out a manifold and elbow set for my 4.3l with my local marina... about a $100 difference between the OEM parts and aftermarket... at this point in time... that's nothing. I was expecting much worse honestly.
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    Popped through the intake.

    So... engine should be done at the machinist next week. Basically, the amount of bore tapper it had he said there was no possible way it had as little use on it as the guy claimed, or the rebuild was crap. Crank pitted, bore looked like sand paper etc. Whatever happened he guesses from prior...
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    FACTORY PARTS..... a bit of a rant....

    When I repowered in May, I pulled the original exhaust pipe out of the boat which still had the original 1984 flapper in perfect shape. It's not even cheaper to get the aftermarket parts unless you get the really really cheap parts... My point? It isn't worth not using OE parts... As far as...
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    Merc prop selector

    Merc also has a dealer demo program if you look on their site. I've never used it but know people who have.
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