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  1. S

    Aq271 Tacho issues

    Ive adjusted the setting on the back which alters the reading but seems to move it in the wrong direction. Im starting to think the tacho might be at fault
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    Aq271 Tacho issues

    i can only get the rev counter to work smoothly off of the alternator but is reading inaccurately. I took the speed limiter off some time ago with no issues. As soon as i connect the tacho up to the - side of the coil it either doesn't work or it jumps and doesn't follow the engine speed. Could...
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    Aq271 Tacho issues

    Hi ive just changed all the gauges on my dash to kus Analogue gauges. Im having issues with getting the rev counter to read properly even after adjustment. ive taken the signal for the tacho away from the coil as this made the gauge very slow to respond if at all. Its now on the w post on the...
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    Kad32 Turbo

    Its definitely been easten away. Not surprising with how close it is to the water line.
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    Yanmar 4LHA STP boat speed down

    Hes currently running 24p props but has tried 22 and26 with not alot of difference. It’s supposedly a 2:1 ratio. Im wondering if the engine is actually the lower hp engine as theres no tally plates on the engine. If this was the case do you think it would still make the revs but not the power Cheers
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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

    Ahh ok was an idea I had to try and preserve the life of them. I do flush them out with fresh water on the mooring by shutting off the water intake and plugging a hose pipe into the suction side of the raw water pump via a fitting. hopefully this will preserve the life of them. What would you...
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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

    Its an edelbrock 1409 il check the choke make sure its moving freely. I did think it might be possibly be the carb getting heat soaked as it only had a paper gasket with no spacer and the fuel pipe is clipped to one of the heat exchanger pipes ( this engine has been modded indirect cooling)...
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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
  19. S

    VP 290 Duo prop Ratios

    Hi Sorry for the late reply. Ive removed the drive and rotated the input and im im only getting 1 3/4 turns roughly to 1 of the prop where i should be getting nearly 2 turns to 1 of prop. This is the orginal engine in the boat but i bought the boat after work had been done to the drive. It...
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    VP 290 Duo prop Ratios

    It turns out i have a 1.78:1 ratio instead of the 1.95:1 I think im slowly getting to the bottom of my problems
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