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Recent content by tgmmartin

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    3.0L Mechanical fuel pump fails when hot

    One (hopefully) final update. After the last outing (March 2026), the crud visible in the fuel filter indicated to me that the fuel tank needed a really good clean out. So I removed the tank and had a radiator specialist clean it out. It's now squeaky clean. I ran the boat both Saturday and...
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    3.0L Mechanical fuel pump fails when hot

    A belated update. I have successfully: -installed new 3/8 fuel line and fittings -removed the gauze on the fuel tank pickup -installed a serviceable transparent inline filter (reasoning is to give larger surfer area than the in tank pickup gauze, and to be able able to see debris building up)...
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    3.0L Mechanical fuel pump fails when hot

    Just to clear on the temp question. A can't recall exactly how hot it is running, but it definitely isn't past the 175 on the gauge (vertical). I have previously completely checked through the cooling performance and been happy that it doesn't run hot. I have been reading through: Mercruiser...
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    3.0L Mechanical fuel pump fails when hot

    Temperature happily sits below 175F. Open circuit cooling with a 140F thermostat. Good question on the symptoms of the old pump. I was having the fuel starvation issues and there was fuel making its way into the oil (oil was thinning and smelt like fuel). I had thought that replacing the fuel...
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    3.0L Mechanical fuel pump fails when hot

    Thanks all for you replies and suggestions. I have tried the following setups: -pickup, inline fuel filter, mech pump -pickup, inline fuel filter, electric pump, mech pump -pickup, primer bulb, mech pump I removed and cleaned the tank last year. But there was a little bit of dirt in the...
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    3.0L Mechanical fuel pump fails when hot

    I have recently been having some fuel pump problems causing the motor to cut out when warm. Background and symptoms: -I have a pressure gauge between the mechanical fuel pump and carb. It reads 0psi when the boat dies.. So obviously fuel is the cause of the issue. -The fuel pump is new with...
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    Alpha One (gen 1) parts advice

    Hi there, I am preparing to replacing the gimbal steering pins and associated bushing/bearings, bellows etc on my 1984 MR/Alpha 1. Due to play between the steering pin and the arm (no play between gimbal ring and pin). I know that I have the square/square upper steering pin. This locks me in...
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    Unable to select reverse - unlikely issue

    Resolved posting my experience in the hope that it may help others Working the list of things to check and fix on a new to me boat with an Alpha one gen one outdrive. Leg went into forward without issue and the prop locked up if turned CCW. But there was no reverse, not even a hint. I...
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    Gasket for Distributor Cap

    I’m tuning up a new to me GM MCM140 (3.0) inboard. Circa 1986 with what appears to be the ordinal distributor (I would suspect cap isn’t original). Changing the rotor and points today I noticed that the old cap appears to have the remnants of an old rubber seal/gasket. For the life of me I...
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