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    Long cranking after sitting 1-2 weeks Mercruiser 4.3

    That!
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    Running boat on land with no prop?

    I totally agree! Debate is good..Open minds are better..finality is rude!?
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    Stupid mistake: Can it be fixed?

    Curious what type of boat?.. and where are you? Lots of rain! No boat cover?..Engine was exposed to the skies?.. Sorry about this!..May not be that bad...Had a similar situation with water intrusion in engine from bad riser.. milk-shake oil and all!..All is good with that engine..Like...
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    1984 228 305 carb problem

    Just so those interested for future reference.. seems I found the problem!.. One of the primary jets not tightened all the way down..Jeez! Allowing extra fuel in bowl at times. Go figure...re tightened both and now have no leaking from the primaries..also vacuum is back to normal as it should...
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    1989 mercruiser 5.7 carb exchange

    You have to be kidding? Posting for a friend.. Yea auto carbs (Pontiac,chevy,olds etc..) are different..but very similar in operation..check out the science! I've run a Quadrajet 7029223 (adjusted/slightly modified) and set-up for marine use) on a (5.7) 350 c.i. boat..it worked great!. but not...
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    1984 228 305 carb problem

    Yes I'm proud of what I've done.. but boy do you know how to ruin a day..and hopes of help from others...Were done dubs..could have discussed our differences..but You chose to insult me..some advise..curtail your opinions to others I hope..leaves a bad taste for these forums....please don't...
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    1984 228 305 carb problem

    Read my post.. a MAJOR vacuum disonnect from intake source should not cause a LARGE jump in rpm's ( a big jump in rpm's caused from excess air/atmosphere means engine/carb. is running way too rich)..I have 2 completed 70 GTO"s here.. to confirm..both are tuned perfectly..a large intake vac...
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    1984 228 305 carb problem

    Just a few I've done.VERY RARE ones also.. ram air 400's or 455 HO's mostly convertibles..I did ALL the work ( INCLUDING ENGINE teardown and assembly.). no subbing out except engine machine work ( boring, valve jobs)..all by my self. with sometimes a helping hand from nephew..LOL..enjoy.. sold...
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    1984 228 305 carb problem

    I really appreciate this info!.Had not thought of that! .I agree..Problem is that the engine has been running too rich for a while and really noticed it just a week ago..therefore my inquisitions.. Thanx a bunch Forrest
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    1984 228 305 carb problem

    I lowered the idle, good grief...I know VERY well how NA engines operates...Properly running early v8 Qjet engine should not jump up hundreds of rpm's with a huge vac. leak and run smoothly....I have a complete restoration shop..with just about every tool imaginable.. been rebuilding classic...
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    1984 228 305 carb problem

    Thanx Dub... but...dubs said.."Vacuum should increase with lower rpm". My Vac. source is from top of intake manifold..every Qjet I have/had is higher the rpms the higher the vac. lower rpms IS lower vac..Now ported vac. is the opposite ( used for distr. adv.. etc..). Compression all cyl. is...
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    1984 228 305 carb problem

    Dubs283 said .."OP needs to lower idle speed and quit thinking about cars when working on a boat".. I get it! That's why I'm at your mercy.. Just to be clear.. What's the difference if running on muffs, next to my shop and engine/outdrive in "idle/neutral" and if boat is IN the lake and...
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    1984 228 305 carb problem

    Thanx..All work is OUT of water with muffs.. The mercruiser manual says 650-700 IN GEAR (under prop load).. so I assume (out of water) 900 rpm or a little less or so OUT of gear out of water no load is close? Scenario in or out of water in neutral should be the same.. Correct?( venturies...
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    1984 228 305 carb problem

    Thanx Bondo// and scott...the q jet carbs I usually work on for early Pontiac GTO's..(400 or 455 cid.) could run at around 6.2 psi..So I assumed this carb MAY be o/k with that?..So my next move will be to regulate it down to 5.5? I will let ya'all know!..Thanx! Forrest
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    1984 228 305 carb problem

    Thanx! That's hilarious!.. I specialize in restoring to #1 levels 69 -72 GTO's!..Been restoring them for 26 years.. LOL.. anyway.. not sure if 6.4 fuel pressure is too high,not sure what is correct? Newer correct fuel pump installed also a while ago, Float is fine..I'll try regulating pressure...
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    1984 228 305 carb problem

    Hey all.. boat/engine is a 1984 chaparral 196 XLT, I/O 228 305 merc. original 4 bl. qJET Merc # 1347-8296A4.. carb# 17080565. Out of water results BTW..Engine rebuilt 2 years ago.. ran fine ..now finding plugs are showing rich.. inspected primary venturies , they are dripping fuel at idle/...
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    info on alpha one gen 1? water pump base..

    Yep I looked at that page a couple of days ago..says 3417 does NOT have the hole, 3421 does DUHH..I get that ..but most 3417's actually do, don't know why, fact is they do.. go look on ebay or other sites, I have for hours....I hope you understand this.. I was just going by what BT said earlier...
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    info on alpha one gen 1? water pump base..

    I agree..But BT doctor, I really appreciate your help....""Houston we have a problem" frustrating thing is that the only base that I could find "without flush/hole" is out of stock.. all the others do not specify..soo apparently there are 2 types of Sierra 18-3417 bases for the MC-1/R.. one...
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    info on alpha one gen 1? water pump base..

    I understand that for sure!.. but still no help as of yet..please read entire previous post..frustrating to say the least
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    info on alpha one gen 1? water pump base..

    soo.. I only found a sierra one here (searching for 30 minutes) and it actually says "without flush".. but guess what?? OUT OF STOCK... https://www.boatid.com/sierra/cooling-pump-base-mpn-18-3417.html
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