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  1. Q

    Yamaha Stern Drive prop hub

    Hi. Apologies if I’m breaking the rules here. I’ve also posted similar in the other outdrive section too. Hi not at all familiar with these. Going to try and prop one well but wondering about prop suitability. Presumably these use a different hub kit than the usual mercruiser ? Defo 15 spline...
  2. Q

    brand new 350 mag mpi getting hot at idle

    Prop perfection and low rpm cruising on the vessel view !
  3. Q

    Mercruiser 350 mpi issues again

    Hi. Engine is a 2003 350 mpi and B3’s. popping lean at full throttle and only getting to about 4000 rpm. New cap and rotor new plugs proved fuel supply with using remote tank and still doing it. no faults logged on rinda and fuel pressure fine sitting running at dock. thinking best case...
  4. Q

    5.7 Holly carb repower issues.

    Hi all. Hoping you can help a self confessed holly carb amateur here !! long story short and after many many things tried so far... Having a couple of issues remaining still after getting lots of issues sorted out already. I won’t go through everything but here goes 350 GM repower engine...
  5. Q

    Inbox messages not legible

    Hi. Hoping someone with more tech ability than I can tell me why I can’t read my messages. When trying to read them, it flashes really quickly between the message and the previous page. I’d need to have matrix style slow motion vision to be able to read it. Thanks
  6. Q

    150 V6 2 stroke rough in gear at idle speed

    Hi all. A friend just bought a new to him boat with a mariner magnum 150 v6. Same as the merc 150 v6 2 stroke. Will likely be an early 90’s thing. At idle it has higher rpm than it should. First thing I noticed, so it’s quite violent going into gear. At a guess it will be doing about 1200 rpm...
  7. Q

    Impressive tempest plus result

    Hi all. Just thought I’d share some findings from a prop testing run today on a friends boat. Boat is a regal 1900 fastrac bowrider Engine mercruiser 4.3 mpi Alpha 1 1.61 ratio test run as it was when purchased last year; Prop 21” 4 blade spitfire all 3 onboard and half tank of fuel rpm...
  8. Q

    Mercruiser 4.3 mpi rattle when stopped

    Evening all Any ideas what this noise is when engine is shut down ? Almost thought it was the lifters or flappers...but listening again. Not sure. Coming from top end and perhaps the rear. Hard to tell. Doesn’t do it when running all through the rpm range all ok. Just when shut down. Any...
  9. Q

    2016 merc 115 CT 2.1l trim issue

    Hi Just a quick one to ask if I’m right in thinking that there is a known issue with these engines not holding trim position and the pump passing to allow the engine to drop over a short period of time at rest, and also not hold a trim position when under load. I’ve now read a few reports of...
  10. Q

    The Enertia...yes, again !!

    So...I know I do always go on about these too much, but having just recently looked through my GPS tracker app from last year, I saw the results recorded from one of the last times I used this boat before putting her into storage, in favour of a more useable cuddy with fuel sipping outboard...
  11. Q

    Tell me about poppet valves

    So...although I’d like to think that I’ve acquired a fair bit of general know how over the years and perhaps even might say that I spent a decade as a marine engineer, (all be it at sea and with much larger marine diesels and anything else that’s on a ship)...currently still an engineer in...
  12. Q

    Power trim shuttle valve passing on recent mercs

    Hi Some May remember me posting about me suspecting that I had a relief valve opening when trimming up towards the upper limit, on my new model merc 115 2.1l CT. I didn’t think too much of it, not being used to an outboard in recent times...but was further concerned when I noticed the outboard...
  13. Q

    Really miss not being able to go boating !

    This lock down over here in the U.K. is a real nightmare. So hard not being able to go boating...especially after waiting all winter. I’m going to have to wait to hear this noise again, for a little while yet !! Miss the primeval noise of this wee thing ...
  14. Q

    Extended trim anode of no use !

    Bit of a bugger today. After previous posts about trying to counter act my horrendous torque steer at slow speed and low planing speeds...some will know I managed to buy the extended trim tab anode that normally sits out the way of the larger props. turns out...even they don’t sit far enough...
  15. Q

    Mercury 115 straight 6 weight

    Hi all. Quick one hopefully can be answered easily. a friend has bought an old glastron with a early 80’s blue band 115 straight 6 on her. He is selling on the boat and removing engine. having seen and heard a few of these but never worked on it certainly lifted one...just wondering what...
  16. Q

    Anyone ran a tempest plus on a heavy open bow ?

    Having repropped My 115 mercury outboard, I find myself with a spare tempest plus that will go on my other V8 mpi alpha drive of a pitch that should act well as an all rounder. Anyone tried the Tempest plus on a fairly heavy 1400kg 18ft open bow hull with a fair bit of power to turn it ? Curious...
  17. Q

    Mercury 115 2.1l 4 stroke 2016 oil drain

    As many will know...this has a clever oil drain fitting on it that you can just attach a piece of hose to then crack open the fitting. It’s down near the mid section. I see online that most are just cracking that open and draining the sump without running the engine first. I’ve always ran...
  18. Q

    Wee Run in the Rib and Sib

    Managed out a wee run in my Brigg 2.7 Rib. My older Yamaha 8 2 stroke had a blocked tell tale so quickly got my newer and last of the 2 stroke made 8hp on it instead. The wee Brigg goes so well. A few speeds over 20 mph recorded GPS. Great fun. Have a look below. searider, you’ll like this wee...
  19. Q

    Mercury 115 CT 2.1l trim relief valve

    Hi all i might have asked this before, but this fairly new to me engine is an amazing thing, being one of the new mercs...but only thing bothering me with it is that it doesn’t quite trim up as high as I’d like a full throttle. It will go to a fair level of trim, then open the relief valve (I...
  20. Q

    Mercruiser MPi fuelling self adjustment

    Hi all...one for the guys that know more than I on the matter... Although I had strongly suspected that the mpi small blocks were able to adjust timing and fuelling to adapt to different octane ratings in fuel, only today I read that they actually do. I had wondered this because occasionally I...
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