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  1. R

    470 poor starting after rebuild

    Well I finally got her started today and she runds nicely. She did take a long time to get started but once running the engine is like a sewing machine so I am pleased. Residual issue is that she is hard to start even once warm. I set the ignition timing using a strobe to 5 degrees btdc. I did...
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    Trim Cylinder Pin / Shaft removal ?

    Ok so here is the problem I have later rams with an early MC1 drive which has the shorter pin in the aft hole in the drive. the cylinder bushing is too big to go on the drive pin so what can I do ? one idea is to remove the shorter pin and replace with the later 10.5 inch pin but getting the...
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    Bendix / Starter gear sticking in flywheel ?

    Came to start my rebuilt engine, timing not set, no start, weird clinching sound every few turns then bendix sticks in flywheel on a slight angle. Looks like it might have ridden over teeth ? ill pull the starter at the weekend but why would this happen and how to avoid reoccurrence ? could a...
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    470 drive won’t go on - engine alignment ?

    Today I tried to fit the out drive back on bell housing after replacing my engine with another. The drive would not go all the way home and was an inch also from meeting with the gasket surface. I tried to remove and reinstall the drive and number of times only to encounter the same problem...
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    470 Rookie Mistake - forgot to prime oil pump - help

    As the title suggests. i jist completed a full rebuild of my 470 and forgot to prime the oil pump. i did align it with the distributor shaft though. the engine is now fully built and installed in the boat but when I tried to get oil pressure by cranking, it won’t even fill the oil filter. i...
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    470 shift interrupt and trim senders wiring

    Evening all, my 470 has never had the interrupt or sender wiring connected and I’d like to fix that. the loom has 4 wires emerging from the rear. A pair of gray terminated to the same ring connector and a single brown and single black with no connectors on. I’d like to ask which is which and...
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    470 Starter Motor Wiring - New Starter with Solenoid

    Hey All, I got the new engine in this weekend and connected up the starter as I could remember but nothing happens when I turn the key. I have the slave solenoid still present but have removed the voltage regulator and stator being the only difference from before. I have battery Red going to...
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    Rear engine Mount Question 470

    Quick question you you all. Im installing the 470 tomorrow and looking at the mount kit I have it has Mount Spacers - part B in the link http://www.glmmarine.com/pdf/Instru-21045.pdf The manual makes no mention of these but they are present in the mount kit. I assume I just leave them out...
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    Merc 470 Exhaust Woes.

    I am replacing the engine in my boat for a rebuilt 470 and today had to halt the old engine removal due to what seems like an unpleasant discovery pertaining to the exhaust collectors. I removed the frankenstein exhaust pipe that was made from an oil pipe of the appropriate diameter and mated...
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    Removing Old Mounts from Bellhousing - 470

    Evening folks, I'm taking on this job next week and removing the mount bushes on my 1986 boat. Any tips and tricks for getting the old bushes out ? I have read that they can be difficult. I will be removing the bellhousing completely as need to put it on the new motor if that helps ? TIA
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    470 Crank Pulley Installation - the last half inch

    Hi All, I am putting the pulley back on the block and the last 1/2 inch is getting very stiff. What kind of rachet is required in terms of length of shaft - is this a job for a strong arm or regular ratchet ? Im trying to get an idea of how much force is required to get it back on. Thanks Rake
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    Yamaha F6 Not Peeing

    Hi All, I have a 2004 F6 and I recently changed the impeller and she ran fine and pee'd well. She has not seen any use except for periodic warm up and she recently stopped peeing. When the engine is then turned off I can hear air either leaving or being sucked in to the pee hole for a few...
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    Merc 470 - someone spilt the bucket with the pushrods lifters and rockers in

    Well I left the tray with the above parts in my garage and it got tipped. No way of knowing what was where. Refit or other options please ?
  14. R

    470 - Oil Pump Alignment ?

    Hi All, Im rebuilding my 470 and dont have this alignment tool. Is there any other way to install the pump and ensure alignment ? Thanks
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    Mixing Notched and Un notched pistons ?

    Hey. Im rebuilding my 470 which needed one piston. The others do not have the notch in them. I've been in touch with falcon global who sold me the piston and they advised that all pistons now have the notch and that the notched can be used in combination with un notched. Is this true and ok...
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    Yamaha 2004 F6 Shift Assembly Question - Impeller Change

    Hi All, I am having issue with re connecting the brass nut that connects to the lower unit threaded shift shaft. When I present the lower unit shift shaft to the brass coupler, it will not thread back on, I feel resistance followed by a clack sound as the coupler turns the whole shaft up...
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    Preventative Head Gasket Replacement and more - 470/170

    I found me a 470 with only 66 hours on it, its a 1978 build and I plan to fit the boat with it and take the boat to a remote location in Greece so wanted to do the nasty bits before taking it over. Its been sat in a shed for the past 25 years so I plan to do the following ? Later alloy exhaust...
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    Does engine rotation matter to an outdrive ?

    If I was to replace a clockwise rotating engine with a counter clock - would the same outdrive be ok to use ? Does engine rotation matter to the outdrive or will the same out drive cope with either rotation ?
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    Merc 470 Head Gasket Failure Root Cause ?

    Hi all, I am troubleshoooting or trying to identify the root cause of the head gasket failures on these engines. an engineer friend is asking What's the core problem though - lack of heat extraction, air bubble formation due to hotspots, gasket failure, head lift? Any info on this ? where and...
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    Any Rochester Carb Experts around ?

    I have a Merc 470 with 2 barrel 2GC fitted, When rebuilding the carb I noted that there were no main well tubes under the venturi - Did this model have them in the first place - if so what effect will it have not using them ? Also, this is the electric choke version, there is no vacuum...
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