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    Fuel sloshing in carb bowl causing funky idle?

    Hi guys: My new Indmar 5.7 with Holley 4-barrel runs great in general, but if I let the boat idle in real choppy water (like in a beam sea) it starts to idle rough and can even stall. It doesn't do this on smooth water so the only reason I can think of is that fuel is sloshing around inside...
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    Need help understanding my Alternator

    Hi guys. I've been reading stuff on the 'Net about alternator wiring, but there's still something I don't understand. There's a little red wire that seems to be called "battery sense" which gets connected to Batt +, and then there's a little purple wire that gets Batt + whenever the ignition...
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    Should my new 5.7 have an engine oil cooler?

    I just bought a new Indmar 5.7 engine, which I'm going to put in my '77 Luhrs 28' (see thread in Resto section for photos). Anyway I notice the engine didn't come with an oil cooler. Do some Mercruiser 5.7's run without it? I'm thinking cooler oil is always a good idea, so I might...
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    Why does exhaust exit the transom right at the waterline?

    Hi guys! On my Luhrs 28' the original transom exhaust tubes/flappers are exactly halfway below the waterline, when the boat is at rest. Why? Is that to quiet the exhaust? If so I don't really think it works because when I'm going along at any decent speed the entire exhaust tubes are out...
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    5.7 repower: Should I go 2 barrel or 4 barrel carb?

    Hi Guys: I have a 1977 Luhrs 28' fiberglass cabin cruiser that I'm going to repower with a Mercruiser 5.7 (350). The question is whether to go 2-barrel or 4-barrel carb. Will the 4 barrel just make a higher max. HP? My understanding is they would both have the same fuel economy up until...
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    Is it possible to use an electric raw water pump?

    Has anyone ever used an electric raw water pump instead of engine-driven? I'm thinking that would have an advantage in that it could be located in an easy-to-access place and a complete spare could be carried. That way if it fails at sea it could be swapped out in 10 minutes or so. The...
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    Need advice on installing engine/tranny in V-drive cabin cruiser

    Hi Guys: Some of you may have seen my thread in the Resto section, about putting a GM 6.2 diesel V8 in a Luhrs 28. Here's my question: I can think of 2 ways to install the engine/tranny/V-drive and I'm wondering which is best. A) Bolt the tranny/V-drive up to the engine on the wood pallet...
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    How much pressure does a raw water pump put out?

    I have a Sherwood G7B typical rubber impeller pump on my GM 6.2 Diesel V8, and I'm thinking of putting a pressure gauge just downstream of the pump to aid in diagnosing any future problems. My question is what pressure range should the gauge have? I'm thinking something like 0-30psi but I'm...
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    What hoses have to be USCG approved?

    I'm wondering if I get stopped for a little inspection by the Coast Guard, what hoses have to be USCG approved? For instance I'm going to have oil hoses going from the engine to/from the oil cooler, and another set of hoses going to/from the remote dual oil filters. Hot oil is going to be...
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    Question about raw water cooling arrangement

    Hi Guys: I'm putting a GM 6.2 diesel V8 engine in my old Luhrs cabin cruiser, and I'm wondering if I have the right plan of attack on my raw water system. The order of components I have in mind is: - Raw water in through scoop-strainer thru-hull (1.25") - Strainer (1.25") - Sherwood G7...
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    Raw water fittings: Bronze, SS, or plastic?

    Hi Guys. I'm wondering what material plumbing fittings I should use for all my raw water connections. (seacock, strainer in/out, oil cooler in/out, tranny oil cooler in/out, heat exchanger, etc.) I'm actually leaning towards plastic. I can get glass-filled nylon fittings that are very...
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    How to manage 2 batteries for diesel conversion?

    Hi guys: I'm mostly over in the Resto section, posting about putting a GM 6.2 diesel in my old Luhrs 28 footer. My question tonight is about how to manage the 2 batteries. Unlike most of you I need both batteries connected to start my engine. But what I'm wondering is what do I run on...
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    Do I have to have a throttle return spring?

    Hi Guys: On the diesel engine that's going to go in my boat (eventually) it has a throttle return spring on the injection pump lever. But I'm thinking with the Morse control the cable pushes the throttle back to idle position, unlike in a car where you want the spring to return it to idle...
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    Does Gelcoat add any more protection over Epoxy?

    I've done the inside work patching over a bunch of defunct thru-hull holes on my old Luhrs and I'm about to start on the outside of those same areas. What I'm wondering is, can I just do the Epoxy/biax, let cure, sand smooth and slap on the bottom paint? Or does the Gelcoat really add another...
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    Need guidance on exhaust cooling setup

    Hi guys. Some of you may have seen my thread in the Resto section about installing a GM 6.2 diesel engine in my old Luhrs 28'. I'm going to freshwater cool the engine with a heat exhanger, but I have a question about the exhaust. There are 2 ways to go: A) Fresh water to the manifolds and...
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    Question about raw water strainer

    Hi Guys: I don't think my boat had a raw water strainer originally, but I'm thinking I should install one as part of my diesel re-power project. My question is: where should it go? Between the seacock and the pump inlet? Or between the raw water pump outlet and all the stuff it's cooling...
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    How many raw water intakes does a V8 need?

    Hi fellow iboaters: I'm going to be putting a GM diesel 6.2 liter V8 in my 1977 Luhrs 28', and I noticed the hull has 2 scoop-strainer raw water pickups. It originally had a single Chrysler 360 V8 from the factory. My question is, forget for a moment that I'm putting a diesel engine in...
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    '77 Luhrs 28 ft. diesel repower SPLASHED!

    Here she is: I just bought her 3 weeks ago. Fish-fighting chairs! Flybridge with Bimini top. (frame good, canvas missing) Horrifically messy bilge: GM 6.2 diesel I'm going to install: She's a single-engine boat that originally had a Chrysler 360 V8, 250HP. I don't have much boat...
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