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    Volvo Trim help

    Also had this problem - twice. Both times the problem was traced to the high amp wire that feeds the pump. First time the plug was corroded - easy fix. Second time it was the fuse that I did not realize was there. In my case the high amp wire goes from the starter to the trim pump, it attaches...
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    Tuning Holley 80551 (4160)

    Thank you again @Scott Danforth - very interesting read. So, the idea is to open secondaries sooner to compensate for insufficient air flow that 600cfm carb provides, did I get it right? I looked up the stock configuration for 80551, it says the secondary spring color is RED. I guess it...
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    Tuning Holley 80551 (4160)

    Thank you @Scott Danforth ! This was extremely helpful, you saved me quite a bit of time/money/aggravation. Went to our local O'Riley autoparts and got a pair of #71 jets and #50 power valve (this is what they had in stock, ordered #35 power valve separately but it will only come in a week)...
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    Tuning Holley 80551 (4160)

    Hello everyone. So, I just got myself a new Holley 80551 (600cfm, 4-barrel, vacuum secondaries) carb for my 5.7 engine. After initial tuning the boat runs great in low rpm range, starts right up. WOT is very good too. The engine bogs down in the mid range. After reaching about 2500rpm RPMs stop...
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    VP vs GM balancer

    Thanks much for your advice. I took a quick look at SFI rated balancers - there are tons of them. How do I find the one that would fit? My engine is 97 5.7 V8. The balancer needs to have holes to accept my Jabsco crank-mounted pump.
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    VP vs GM balancer

    Hello everyone, I've been struggling with my new Jebsco crank-mounted sea water pump wobbling (see my old thread "Crank-driver raw water pump upgrade" if curious). Recently, I've replaced the steering pump pulley that was also wobbly. That allowed me to trace better the source of wobble on the...
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    Edelbrock 1409 tuning

    I've been playing with my Edelbrock 1409 for past couple of seasons (I have 97 5.7 GI converted to carb). My accelerator pump is set to minimum. Tried changing it around and did not see any difference. I am not an expert by any means, but your problem feels more like a metering rod problem to...
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    Edelbrock 1409 woes

    It is confirmed. The accelerator pump did not squirt after the boat was sitting for a week. Several seconds of cranking did was not enough to fill the carb either - still no squirting. Thanks Bondo, I did some searching and found a relevant thread in Mercruser section. The solution that was...
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    Edelbrock 1409 woes

    It's hard to say. My first time out with the new carb I overheated starboard riser, which led to a series of failures (including the ignition module failing, probably due to high temps in the engine compartment). It took me a while to track down all the issues and get back to "normal". This is...
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    Edelbrock 1409 woes

    Hello everyone. So, I have a 1997 Pursuit that originally had 5.7GIPLKDCE. At some point the previous owner killed the engine and the block was replaced. For whatever reason they decided to replace the original fuel injection setup with a carburetor. When I bought the boat, the carb (I think it...
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    1997 5.7 Gi fuel system

    Thanks Lou, this is great advice. I've been toying with the idea of putting in Holly Sniper Marine EFI - looks like one can get it for not much more than a good carb. You a remaking a good argument though...
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    1997 5.7 Gi fuel system

    Thanks alldodge, You are exactly right, the carb is easy to adjust indeed, and the problem lies with fuel evaporating from the bowls. However, I do have electric LP pump (I am guessing the legacy from the original setup), so, it takes some time for it to kick in. Also, when fuel evaporates from...
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    1997 5.7 Gi fuel system

    Hello everyone. Can somebody explain (or point me to the appropriate information source) how the fuel injection system works on the 5.7 Gi engines? I have 1997 Pursuit 2460 that had the original engine replaced by previous owner. The original engine was 5.7GIPLKDCE, i.e. fuel injected. The...
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    Crank-driver raw water pump upgrade

    That's a scary thought! Didn't realize the balancer can fail. Just watched the video again myself. I think the reason the belt is vibrating is the steering pump pulley. The steering pump pulley is all beat up and is not moving straight causing the belt to move. The crank pulley looks stationary...
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    Crank-driver raw water pump upgrade

    The bracket is there (the pump would spin with the crank without it). I was trying to keep the phone close (and from different angles) to capture the exact way the pump moves. It looks to me like the body of the pump moves sideways while the crank-mounted pulley does not...
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    Crank-driver raw water pump upgrade

    So, I upgraded my pre-1997 VP belt-driven raw water pump to a high volume Jabsco crank-driven pump. Happy with the performance, maintenance is much easier - great upgrade. However, I am getting this vibration from the pump, see the video: https://photos.app.goo.gl/uRqy9tPf3ejCde4z7 I am guessing...
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    Riser (elbow) temperature

    The season is almost over here in NE. So, I'd like to offer some closing notes to this issue. I did the raw water pump upgrade - upgraded to a crank-driven Jabsco high flow model. This nearly doubled the flow rate at low rpm. Riser temperatures also dropped. However... the flow rate still maxes...
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    Raw water pumps

    So, I've been having problems with my exhaust elbows overheating (I have another thread going on this). Long (very long) series of tests led me to questioning the raw water pump. From what I hear, the pump should be producing 24G/min @3000 rpm in-situ. If I bypass EVERYTHING, i.e. 1-1/4" ID hose...
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    Things to do after engine sucked in water

    Can somebody point me to a list of recommended procedures after water intrusion into the engine cylinders? So, I had a slight cylinder head overheat due to brief water flow restriction to risers during cooling system testing. Nothing substantial, engine temperature gauge barely moved above 160...
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    Riser (elbow) temperature

    What is riser (exhaust elbow) normal temperature at WOT for fresh water cooled 5.7 V8? I've installed temperature sensors in both of my risers after having problems with overheating (the problem was air leak in the outboard water intake line, now fixed). I verified temperature readings with a...
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