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  1. R

    prop selection!

    Hi guys am i correct in thinking that the lower the pitch in a prop (i.e. 13-1/2 down to a 12 or 11-1/2) then the higher it is going to rev thus getting it nearer to the engines optimum rev range, and would this then make the vessel go faster?.<br />i have a 15ft chrysler striper with a US...
  2. R

    prop selection!

    Hi guys am i correct in thinking that the lower the pitch in a prop (i.e. 13-1/2 down to a 12 or 11-1/2) then the higher it is going to rev thus getting it nearer to the engines optimum rev range, and would this then make the vessel go faster?.<br />i have a 15ft chrysler striper with a US...
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    prop for 1989 force 50

    Thankyou to all who have given advice on my motor,it is now rebuilt although i have yet to turn the key but surprise surprise the weather is now against me now grrrrrrrr.<br />The prop on my engine at the moment has afew dings on it and so i am looking around for a new one and i have found one...
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    help with parts for 1989 us marine force 50

    Hi,i don't know if any of you guys can help me but i am trying to get hold of parts for my 1989 us marine force 50,what started out as a head gasket replacement is now starting to grow into a major overhaul mmmmmmmm.these parts are not cheap over here in the uk i.e upper mount shock £60(106 us...
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    will tacho work on force

    Hi,located a teleflex red international tachometer p/n 13291P will this work on my 1989 us marine force 50, or is it p/n 53743P that will only work for this motor.
  6. R

    engine height on transom

    bought a chrysler striper(15ft) with a 1989 us marine force 50hp,the outboard sat on a 1/2" block on top of the transom which made the hydrofins that were fitted sit about 1.5" below the keel,with 3 adults with fishing gear i was getting around 25 knots(gps) with moderate weather(not calm)and i...
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    tacho for 1989 force 50

    Hi all,my problem is that i am having GREAT trouble trying to find a tach/rev counter for my force 50(1989) as i believe that these engines need a special one mmmmmmmmm, i think the main problem being that i am in the uk and there seems to be not many of these motors about so i do not know how...
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    rebuilding 1989 force 50

    Hi,i'm just going to start to rebuild water pump,cylinder head and exhaust covers and i do not want the bolts to seize when and if i need to take apart in the future so what should i used to prevent this,just grease the threads or is there something specific for this job. i will grease the...
  9. R

    what grease for rebuilding engine

    Hi all, i am in the process of rebuilding my 1990 force 50,i took the boat out on sunday it was misfireing on bottom plug so took out and water was getting in so head gasket job also the exhaust plate gaskets were leaking abit so anyway i have taken engine apart(due to three head bolts snapping...
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    guidance on working on 50hp force.

    Hi my motor is a 50hp us marine force(507F9B,s/n1254)and i have ordered my parts(impeller,head gasket, fuel pump repair kit)apart from the impeller(bolts on gearbox look all shiny and new compared to rest which all still have paint on so i am assuming impeller has been done in the past but i am...
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    height of prop...

    i have a chrysler striper with a 50hp force us marine(model-507F9B s/n 1254).I have just taken the motor off as i am replacing the transom due to rot and noticed a 1" block of wood on the engine bracket(between transom and mounting bracket)is this bit of wood important and would that extra 1...
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    help with 50hp force

    in the process of replacing wood in transom as original rotten so had to take engine off and noticed crystals and moisture coming out/off around the head gasket,it has been about 3 weeks since engine last run is this normal,i am in the uk so runs in salt water.engine use to start first time and...
  13. R

    help with remote control box

    Hi,i placed this question in another section but i think it should of gone in here..so here goes!it is probably something simple BUT can i find what it does..NO.<br />I have a force 50hp(1989) and the remote has US MARINE stamped on it,i've sussed out that the rocker switch on throttle/gear...
  14. R

    repairing cracks and chips

    Hi,i recently bought a chrysler striper(15ft 1978)with a 50hp force on the back,i am very happy with the package but due to its age has a few cracks in the gel-coat(due to knocks and trailer roller pressure)and chips in the keel revealing the resin. What is the best/correct way to repair the...
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    will merc prop fit force

    Hi all,my dilema is that i have a force 50hp(s/n 507F9B'1989')which is pushing a 15ft chrysler striper(cathederal hull),the current prop has a few dings in it(nothing major) and it is a 3 bladded prop.will a prop for a 50hp Merc(s/n 48.77346A40L 15P, DIA 13PT 19 ALUMINIUM fit my outboard, they...
  16. R

    portable cuddy for my boat

    Hi all, i have just recently bought a 15ft chrysler striper boat(s/n CB057738M79D)and i am in the UK(isle of wight)so BRITISH weather usually wet so i am trying to find a cuddy or maybe a pattern(drawings)of a cuddy so if the wind picks up or starts to rain heavily i then can erect some kind of...
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    help with a crysler 50 EL force

    Hi,just upgraded myself from a 12ft clinker style hull with a 8hp yam to a 15ft chrysler striper with a chrysler 50HP EL (s/n 507F9B),both boat and engine were well looked after and i was told that the engine has ben upgraded but i do not know what that means.No manual for engine came with it...
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    stop and think first....

    i am in the process of painting and rebuilding my yamaha 8hp, and i stripped everything except for taking the prop off as it was seized solid (or so i thought!!!), i have been trying for about 3 whole weeks to try and prise the black cap in front of the prop, i've used loads of wd40 tapping it...
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    yamaha 9hp service

    Hi all,went out all night in my 12ft boat(powered by yam 9hp, 40 mins into journey (at full revs)engine slows then dies then i could smell evidence of a very hot engine.anchored up for afew hrs to fish(mate with me in his boat'few') then engine started ok and got back in under own steam(no pun...
  20. R

    how old is my yamaha 9hp

    Hi,i have just bought what appears to be a yamaha 9hp but there is not a plate on the mounting bracket (just 2 corroded rivets) it runs ok a bit hot(on tick-over water coming out was quite hot) but i will check therm on top of head(as i can see one), i would like to know age and anything else...
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