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    Yanmar 4LHA STP boat speed down

    Evening im working on a boat that has had a yanmar 4LHA STP fitted. The boat previously did just shy of 30knots with an older Mercruiser diesel engine. The engine is fitted into an offshore 25 sports fishing boat with a bravo 3 duo prop sterndrive. Would anyone be able to advise the correct...
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    Kad32 Turbo

    Evening having issues with a volvo penta kad32 not making the revs. Have fitted a boost gauge onto the inlet manifold. Boost pressure completely falls off when supercharger is un plugged manually Would the verdict be that the turbo is knackerd. Looking at the gap between the housing and the...
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    Aq271 Sender Resistances

    Hi would anyone be able to advise me on what resistance the water temp and oil pressure gauges work on. Ie ameican or european resistance there paired up with what I believe to be the original volvo penta gauges with the red and green scale. When I put a meter on the senders the water temp read...
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    Dp 280 bent shaft or not.

    Afternoon working on a boat with a volvo pents dp280 drive noticed that the most aft prop is bent. Ive Dti the shaft and the run out is about 0.18mm. Would anyone be able to advise what the maximum run out is and is 0.18mm with in tolerance Many thanks
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    Aq271 fresh water cooled Manifolds

    Hi im thinking of converting my exhaust manifolds to fresh water cooling as I have a closed loop system on this engine already. Has anyone done this and if so is there much work involved if so where do the pipes run too and from from the manifold Many thanks Sam
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    Volvo penta Dp 290 trim guage

    Hi im looking at modernising my dashboard on my boat and using guages that match. Does anyone know if its possible to swap out the volvo penta square trim guage to a more common round trim guage. If so is there much wiring that needs to be altered to make this work. Many thanks Sam
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    Aq271c engine oil

    Hi would 10w40 semi synthetic be suitable to use in this engine. I know the book states 10w30 but i cant source this oil Cheers
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    Aq271 poor starting on hot engine

    My aq271c starts up perfectly from cold, a couple of pumps of the throttle and shes running. If i go for a run out anchor up and go to re start 30 mins later it takes quite alot of crancking to get it fired up again. Once its fired and you turn it off and start it again it will fire right up...
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    AQ271C Alternator not charging Resistor issue

    My alternator doesnt seem to be energizing. Theres a resistor in the loom going to the field coil in the alternator which i suspect is at fault. Does anyone know if this is still avaliable and if not what value the resistor should be cheers
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    Volvo penta 7.4gipefs fuel Injectors

    A friend of mine has a volvo penta 7.4gipefs and has an issue with 2 of his injectors stuck shut Can anyone recomed a good supplier of these or any good second hand ones. Or even someone who can overhaul. injector part number 3854518 Many thanks Sam
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    Dp290 drive question

    Hi could anyone tell me what abcd when you see DP 290 A B C D Cheers
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    VP 290 Duo prop Ratios

    Hi ive potentially got an outdrive on my boat that has the wrong gear ratio (was replaced before i bought the boat). Boats comming out of the water later this week to remove drive and work out ratios correctly. If they are wrong is it in the lower gear housing or the upper gear housing where...
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    Sunseeker Mexico 24

    Hi just wonderd if anyone could recommend the correct props that should be fitted on my boat i have an aq271c volvo penta 5.7 v8 and a dp 290 drive. The boat is a sunseeker mexico 24 and weights 2 tonne. Currently running b5s propellees but revs out at about 3200 Cheers
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    Aq271c Engine wont rev past 2000rpm

    Hi I have a aq271c which required quite a bit of work when I bought the boat. But the engine won't rev over 2000 rpm when in gear. ( will rev freely out of gear) Ive replaced distributorcap, rotor,leads plugs, fuel pump and carburetor from a holley 1406 to a elderbrock 1409. Ive also removed the...
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    Volvo penta dp290 water hose

    I have bought a new sea water hose(876632 )thst goes through the transom then into the leg. Question is where does the oring go the seaward side of the flanged end of the pipe or the inboard side where the chrome tube bolt to the transom shield Many thanks Sam
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    Volov penta Dp290 trim rams rebuild

    Hi just undertaking rebuilding the trim rams (3860881) on my volvo penta 290 outdrive as one of seals was weeping. Question is how do you fit the plastic part of the seal kit that sits over the oring on the piston part of the ram. As you slide it over the piston it seems to stretch it and then...
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    Aq271c Manifold and riser torque settings

    Im planning on replacing manifolds and risers and need to know the correct torque settings, if anyone could advise me on this id be very great full. Also has anyone got a link for a pdf manual for this particular engine cheers Sam
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    Dp 290 aq271 allingment

    Last question I promise. What is the correct way of allinging the engine to the drive. The mounts on the engine are shot and need replacing. I wanted to check engine allingment after replacing the mounts Cheers
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    Volvo penta Mechanical fuel pump

    Hi me again. Does anyone know what the inlet and outlet port thread sizes are on a volvo penta pump 826493 I know its an inverted flare but need to know the thread Cheers sam
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    Aq271c fuel feed pipe to Holley 4106 4bbl

    Hi would anyone br able to recommend the correct fuel pipe that goes from the mechanical fuel pump to a Holley 4160 4bbl marine carburettor on a volvo penta Aq271c Cheers sam
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