Question 1

Should I rebuild or repower my diesel engine?

Lukas · Accepted Answer

It depends on the engine's condition, its hours and what parts for it cost. We check compression, the fuel and cooling systems and the oil, then give you a written estimate for each option, so you can compare a rebuild with a replacement engine before anything is done.

Question 2

What is the difference between repairing a diesel engine and rebuilding it?

Lukas · Accepted Answer

A repair fixes the part that failed, such as an injector, a pump or a gasket. A rebuild takes the engine apart and renews its worn internal parts, such as rings, bearings and gaskets, with any machining done by a machine shop. We tell you which one your engine needs after the diagnosis, with a written estimate.

Question 3

How much does a diesel engine overhaul cost?

Lukas · Accepted Answer

Labor is $150 an hour, plus parts and the trip fee for work at your boat. A diagnosis is at least $300 for each engine; then you get a written estimate for the repair, and nothing is done without your OK.

Question 4

Do you check the cooling system during an overhaul?

Lukas · Accepted Answer

Yes. Overheating is often caused by a clogged raw-water intake or strainer, a worn impeller or a stuck thermostat. We check the whole cooling system, find the cause and quote the repair before we do it.

Question 5

Can the overhaul be done with the boat at my dock?

Lukas · Accepted Answer

Yes. Whether your boat is in the water or on a trailer, we come to you in San Pedro, Wilmington, Long Beach, Redondo Beach, Seal Beach, Huntington Harbour, Marina del Rey and Newport Beach; farther places on request. Each visit has a one-way trip fee by distance, from $30 in San Pedro to $110 in Newport Beach.

Question 6

Can you bring back a diesel engine that has been sitting for years?

Lukas · Accepted Answer

Often, yes. We start with a compression test and a check of the fuel, starting and cooling systems, then tell you what can be repaired and what needs replacing, with a written estimate. Old fuel is drained and disposed of, and the fuel system cleaned, before the engine is started.

Question 7

What if the starter engages but the engine will not turn at all?

Lukas · Accepted Answer

That usually points to a weak battery or a poor connection, a starter that has failed, or an engine that is seized or has water in a cylinder. Do not keep cranking it: we test the batteries, cables and starter and check whether the engine turns by hand, then give you a written estimate for the repair.

Question 8

What is valve adjustment and why is it important for marine engines?

Fryderyk Florczak · Accepted Answer

Valve adjustment resets the small gap (valve lash) between the rocker arm and the valve stem to the engine maker's spec, so the valves open and close at the right time. Wrong clearance causes power loss, noise, rough running and, if too tight, burned valves.

Question 9

What does a compression test tell me about my engine’s condition?

Fryderyk Florczak · Accepted Answer

A compression test measures the pressure inside each cylinder to evaluate engine health. Low or uneven compression can indicate worn valves, piston rings, or head gasket issues. This test helps diagnose problems before they turn into costly repairs.

Question 10

How often should valves be adjusted on a marine engine?

Fryderyk Florczak · Accepted Answer

It depends on the engine maker and model, and the intervals vary widely, so follow the schedule in your owner's manual. Tell us your engine model and we will check its schedule.

Question 11

Can improper valve adjustment cause engine starting problems?

Fryderyk Florczak · Accepted Answer

Yes. Valves that are too tight or too loose can affect compression and combustion, leading to hard starting, misfires and poor throttle response. When lash is the cause, setting it correctly brings back easy starting; if the engine still starts hard, we look at fuel, glow plugs and compression next.

Question 12

What is included in your valve adjustment and compression testing service?

Fryderyk Florczak · Accepted Answer

Our service includes checking and adjusting valve clearances to the maker's specifications, a compression test on every cylinder, and a written record of the results. If a reading is abnormal, we tell you what it points to and what we recommend.

Question 13

Can a compression test help prevent major engine failure?

Fryderyk Florczak · Accepted Answer

It can help. A compression test shows internal wear early, so it can be dealt with before it leads to a major failure. Catching a problem early usually costs much less than a rebuild or replacement.

Question 14

Do you provide documentation and recommendations after testing?

Fryderyk Florczak · Accepted Answer

Yes. You get the compression reading for every cylinder, notes on valve clearances and our recommendations, useful for maintenance planning and for showing a buyer the engine's condition. It is a mechanic's report, not a marine survey; insurers and lenders often require a survey by an accredited marine surveyor.

Question 15

What is an exhaust riser and why might it need replacement?

Fryderyk Florczak · Accepted Answer

The exhaust riser connects your engine’s exhaust manifold to the exhaust system, directing engine gases out of the boat. Over time, it can corrode or crack due to heat and saltwater exposure, which can lead to leaks, reduced engine performance, or water entering the engine.

Question 16

How do I know if my exhaust riser or elbow is failing?

Fryderyk Florczak · Accepted Answer

Signs include rust streaks or weeping at the joint between the manifold and riser, milky engine oil, a cylinder that misfires or is hard to start after the boat sits, steam or white smoke at start-up, overheating, and exhaust leaks or soot at the joints. Cast iron risers can fail inside with no outside sign, so their age matters too.

Question 17

Can I replace just the riser or do I need the whole exhaust system?

Fryderyk Florczak · Accepted Answer

In most cases, only the exhaust riser and/or elbow need replacement. We inspect the entire exhaust system to ensure other components are sound, and we replace only what is necessary to restore proper function and prevent future leaks.

Question 18

What type of parts do you use for replacements?

Fryderyk Florczak · Accepted Answer

We install factory-spec cast iron risers and elbows for MerCruiser and Volvo Penta engines, or a 316 stainless mixing elbow as an upgrade for Yanmar diesels. In salt water, cast iron typically lasts 3 to 5 years; your written estimate names the exact parts.

Question 19

Do you test the exhaust system after replacement?

Fryderyk Florczak · Accepted Answer

Yes. After installation we run the engine, check that cooling water flows properly through the new parts, and look for leaks at every joint.

Question 20

How long does an exhaust riser replacement usually take?

Fryderyk Florczak · Accepted Answer

Usually 4-8 hours of labor, depending on the engine, how badly the old bolts are seized and whether the manifolds are replaced too. Your written estimate gives the time for your boat, and we check the whole system after the replacement.

Boat Engine Repair

Boat Engine Repair in Long Beach and San Pedro

What the work covers

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Questions about boat engine repair

Can you check my engine where the boat is kept?

When does a repair turn into a rebuild?