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    454 won't go above 2000

    Mercruiser 454, I'm not sure the year or model number as the block was replaced years ago with a marine power engine. It is a multi port, MEFI 7.4L, fresh water cooled. The engine runs great up to about 2000-2050 then doesn't go above that. It doesn't skip a beat at any rpm below that, it runs...
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    Broken U-joint Retainer Nut

    I have an alpha 1 that I've got to reseal the upper on. The only problem is some of the tabs on the retainer nut broke as I was trying to loosen it. I've never had one of these break before and didn't think they would so easily but this one kinda just fell apart. I'll try and upload picks. My...
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    Evinrude 225 wire diagram or service manual

    I have a 225hp 1986/87 evinrude and I'm trying to find a wiring diagram for the ignition system as I'm having a lot of trouble with it. I unfortunately don't have any model number or anything else. If anyone has a diagram that can post it i would really appreciate it, thanks.
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    Engine alignment question

    I'm trying to align a yanmar with the transmission to the propshaft. Up and down is fine but I can't get the left and right. The mounts are all engine mounts and no transmission mounts. All four mounts only adjust up and down and not left to right. As of now it is too loose on the 3 o'clock...
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    Mercury tiller arm question

    Mercury OT001643 This is the tiller arm style that has the two cable linkages for the shift and throttle inside the tiller arm and they cross over to the other side of the engine and hook into a round things with grooves. The cables broke and I'm looking to do this with a manual because i know...
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    Mercruiser running poorly above 4000rpms

    I have a v-6 carbed mercruiser inboard but will have to get back on the model number and year but I believe it is from the 80s. It uses points. I did the oil change already and did the fuel filter. It runs real smooth and doesnt miss a beat up to 4000rpms but when you give it a little more...
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    Gimbal housing/Gimbal Ring Question

    Identification: I believe it is either a 1995 or 1996 engine. It is one of those omc/Volvo mixes that they did for a short time. I believe the drive is called SX. The shifter at the drive has the cable where you have to spin the nut off and take out the cotter pin at the drive instead of...
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    Gimbal ring part number

    I need to replace an omc gimbal ring but can't find a part number for it. The style that I have has the shift cable coming through with a cotter pin and a little nipple thing that you have to unscrew from the shift cable to get the drive off. Below is a link to the oposite style, I can't find...
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    Looking for fuel management wire diagram

    Twin Yamaha HPDI Z250TXRB. I'm putting in the Yamaha fuel management gauge and would like to find a copy of a wire diagram to do it. If anyone could help me out that would be great. Thanks
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    Yamaha Z250TXRB temp sensor wire question

    Im installing two used Yamaha Z250TXRB HPDI engines, 2003. I'm using the engine harness that came with them. On the starboard top side of both engines is a temp sensor on the top of the cylinder head. The wires are disconnected and I can't seem to find where they connect to. I would assume they...
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    Toe angle calculation

    I have a 30' scarab with twin 250hp HPDI yamahas. They are 25 and 7/8" apart. I'm installing a tie bar and am looking for help getting the toe in/out calculation. I'm mainly looking for safety reasons and not overly concerned about the greatest of performance. I'm assuming toe in is when the...
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    HPDI wire question

    I have a Yamaha 250 HPDI Z250txrb, I think '02 or '03 There is a large pink wire coming from a fuse labeled isolator fuse, where does the other end of this wire go? I was thinking it goes to the main (+) connected to the started but didn't want to put it there till I found out for sure. I...
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    Mistake in mercruiser manual?

    4.3lMpi engine, 2003. I forget the number but it falls in the OM322781 and above ones. Manual 32. On page 4b-13 they are showing what position the rotor has to be in when installing the distributor if the engine is at TDC. I got the engine over to the compression stroke TDC but where they...
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    Heres a good mystery one

    Eng #OM640816 MPI 4.3 2003 engine year Last September (2011) we had the starboard cylinder head go bad as it had a crack in it. It wasn't from winterizing because it was being used all summer long with no problems. We thought at the time it was from bad manifolds and risers, that water got...
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    Suzuki temp light flashing while cold

    Suzuki df140 2001. The temp light just started to flash. Both the pump impeller and the thermostat were done in the beginning of the season and the boat was used a number of times with no problems till now. The engine is actually a good temperature tested with my temp gun so it is not actually...
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    90hp johnson, water in cylinders?

    Not sure year or number but it is an older johnson 90hp (VRO that was removed) 4-cyl. and at the bottom of the heads are the thick hoses that come out. 2 big Carbs and one of the chokes with a red handle. Very hard to start and ran really rough the last time it did start. Cleaned carbs but it...
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    Mercruiser 7.4L Overheat

    Mercruiser, 7.4L MPI. I will get the engine number tomorrow but it is the kind with the thermostat in the heat exchanger, I think they only did that for a couple of years if that helps. Freshwater cooled, damper pulley mounted raw water pump. I can start the engine up and let it run all day...
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    Submerged Mercuiser Now Needs Different Style Plugs

    Mercruiser ow356239, MPI Bravo III. The engine went under and Before I started it up I got all the water out of the oil pan and all the water out of the cylinders (rag and thumb over s/p hole while cranking). I changed the oil and filter then went to start it up for the first time since going...
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    GM Omc stalls in reverse

    GM OMC 4.3L V-6 carbed. 1988. Cobra drive(not the one where the shift cable goes through the drive but the one where a shift lever is pushed up and down at the boat side of the drive.) The boats runs fine in fwd but when I put it in reverse and give it gas the engine stalls.
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    Mercruiser Inboard Overheat

    Mercruiser gm inboard v-8 1980 freshwater cooled. The engine slowly overheats after running at a higher rpm. The engine will get up to a little under 200. The sensor itself is not in the thermostat housing it is conected to the intake manifold so I'm not sure how hot they usually get but...
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