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Recent content by infinityron

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    Riser gaskets

    Thank you for your replies. I did one engine yesterday. I was pleased that both the riser and the manifold passages were wide open, without a lot of deterioration. I opted to use solid block off gaskets on both sides of the ss plate. I did use the aviation sealant, but I need to ask why you...
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    Riser gaskets

    This may qualify as a really stupid question..I have in hand the ss block off plates and I ordered "mercruiser fresh water cooled gaskets" but in the gasket package, they included one total block off gasket and one slotted gasket. I have a complete closed "fresh water cooled" system so I'm...
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    Riser gaskets

    Quick question, I'm gonna be replacing my 90 degree cast iron elbows behind the risers on mercruiser 7.4 mie's. To get the hoses off, I will need to unbolt the risers from the manifolds to move the risers. I have the "fresh water cooled" system with center rise risers off the manifolds and no...
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    Crusader throttle body fuel injection

    I am helping a friend with possible purchase of a 1998 Silverton with Crusader 454 XL s and throttle body fuel injection. Already had a mechanical survey done and outcome was very good. I am a little unfamiliar with throttle body fuel injection though. What are pros and cons? Also, can someone...
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    Thunderbolt IV timing, carbed 7.4

    Ok, at the great risk of exposing myself to sarcasm and ridicule, I am hoping hoping hoping for a really simple, layman explanation of timing procedure on a Thunderbolt IV, 7.4 carbed engine (1990) I am a fairly good diyer and owned more boats than I can count of all types for 50 years. I've...
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    no spark

    folks....this is actually about my Mercruiser 7.4 mie w Hurth trans, but I don't see a section for Mercruiser MIE. It's close enough to Crusader 454 to ask this distributor question........yesterday I was going to check my timing on starboard engine only because I wanted to make sure it was...
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    mechanical fuel pump overflow line

    Just looking for input here, if any, on specifically which material to use as the overflow hose/tube from mechanical fuel pump to carb? I have used a clear plastic material in the past but can't remember where I bought it. Reason I went with clear is to be able to see if fuel enters that hose...
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    which mechanical fuel pump 7.4

    guys, I'm posting here because I don't see a Mercruiser MIE section and just want to get it right. I have a 1990 Mercruiser mie 7.4 which is essentially same thing as Crusader with a few bolt on differences I believe......looking for verification of which mechanical fuel pump to buy. A parts...
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    oil samples with positive for glycol

    This will probably be viewed as dumb question because I am experienced boater (50 years) and diy engine mechanic but.......I'm considering the purchase of an older Tiara with twin 7.4 fwc engines. Coolant looks clean and full in the heat exchangers, oil is not milky and looks ok visually. I...
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    Crusaders not achieving rpms

    I know I'm opening up for some flack, but need to ask opinions anyway.....I have an old 32' sportfisher with twin Crusader 454's, RAW WATER COOLED. Ive been around boats for 50+ years so I know the negatives of this situation. As some of my friends on this forum may recall, I have owned this...
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    thermostat question on older crusader

    I'm replacing the tstat on my older vintage RAW WATER cooled 454. Not overheating but more preventative than anything. The temp gauge not going high but fluctuating a bit which is unusual. My engines pretty much run at 145 all day long. I ordered and await a factory replacement tstat housing kit...
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    6cta 8.3 m3

    Looking at a boat with a pair of these, vintage 1994. Boat appears well maintained overall. I will hire a mechanic and surveyor of course, but wondering if anyone can offer info, pros and cons, weak links etc on these motors. the clock does show 4200 hrs currently. thanks for any input.
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    6LPAM-STE parts

    Does anyone have a parts source for Yanmar 6LPAM-STE ? Specifically heat exchanger. And while I'm here, Why does the engine tag on these motors say 6LPAM? Everything I see online simply says 6LP-STE thanks in advance
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    gas shooting out top of carb 4 hp 4 stroke

    I have a 2003 mercury 4hp 4 stroke. been a little stubborn starting lately. I changed the in line fuel filter under the integrated tank. I confirmed fuel flow after the pump. Got it started and it seems to want to run and idle ok, but there is raw fuel spitting heavily out of two little nipples...
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    v drive help

    Guys, I have an old 1976 Jeffries sportfisher with twin 454 Crusaders coupled to Thermo Electron V Drives. Everything is running great but I wanted to check all my fluids recently and discovered that everything looks spectacular.....engine oil, trans fluid and v drives all look like new...
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