Search found 790 matches

by Gannet
Wed Sep 05, 2012 3:51 pm
Forum: General Topics
Topic: FV or FVP
Replies: 25
Views: 4293

Re: FV or FVP

Whilst we are on early transom brackets, what are the small (0.175x0.200) cut outs on the ends of both legs of the brackets? Initially I thought that they were some manufacturing location point, but not at all sure.
Jeremy
by Gannet
Tue Sep 04, 2012 9:43 pm
Forum: General Topics
Topic: FV or FVP
Replies: 25
Views: 4293

Re: FV or FVP

Yes, I have three small transom brackets which have all seem to have been plated. I cannot confirm that the plating is zinc - could it have been cadmium? My early SJM, recently acquired, came with a small bracket. My measurements show that the small ones are about 1 3/4 effective opening, wheras the...
by Gannet
Thu Aug 23, 2012 5:31 pm
Forum: Help
Topic: Full throttle problem
Replies: 9
Views: 2556

Re: Full throttle problem

Rolf,
Thanks for your advice. I will bend it a bit to increase the fuel height.
Cheers,
Jeremy
by Gannet
Wed Aug 22, 2012 7:20 pm
Forum: Help
Topic: Full throttle problem
Replies: 9
Views: 2556

Re: Full throttle problem

Yes, Thanks for your advice. I have checked the two filters - visually ok. Additionally, with the float chamber bowl removed there is a good flow of fuel (tank is half full). Also checked that the bottom of the loop of the pipe twixt tank and carb is clear. I did notice that the 'Y' shaped piece tha...
by Gannet
Wed Aug 22, 2012 12:43 pm
Forum: Help
Topic: Full throttle problem
Replies: 9
Views: 2556

Re: Full throttle problem

Hi Rolf,
Thanks for your advice.
The reduction in engine speed as the throttle is slowly opened beyond 3/4 is quite marked; to an extent that it sounds as if its going to stall at full throttle.
Shall I adjust the needle screw adustment by 1 turn out?
Cheers
Jeremy
by Gannet
Wed Aug 22, 2012 10:25 am
Forum: Help
Topic: Full throttle problem
Replies: 9
Views: 2556

Re: Full throttle problem

Thanks for your quick reply. I am using 10:1. It is mixed accurately. 100ml of TC-W3 added to 1 litre of 'new' petrol. I have just removed the needle. It is marked '3'. I believe that to be correct for 10:1. The needle looks a bit 'worn' over the last 0.35 inch. The plating is missing over this leng...
by Gannet
Wed Aug 22, 2012 8:59 am
Forum: Help
Topic: Full throttle problem
Replies: 9
Views: 2556

Full throttle problem

My 40 Minus (SJM) starts first pull, runs smoothly and has plenty of thrust up to about 3/4 throttle. Opening the throttle to 3/4 and beyond produces a reduction in speed with the engine sounding as if it is going to stall. I cannot replicate this in my small test tank - (propeller left on for this ...
by Gannet
Sun Aug 05, 2012 12:38 pm
Forum: Help
Topic: SAE90 OK ?
Replies: 11
Views: 2607

Re: SAE90 OK ?

But how do you separate the water out? Just leave it in a jar? Yes, I can see that using an emulsion is no problem at all, except presumably when the oil content is too low. How can one tell when this point is reached? Also if the water does indeed separate out at the bottom, could this corrode the ...
by Gannet
Fri Aug 03, 2012 9:28 pm
Forum: Help
Topic: SAE90 OK ?
Replies: 11
Views: 2607

Re: SAE90 OK ?

Because I use my two 40s at irregular intervals, I drain the gearbox after a small amount of use and top up with new SAE140. The old oil/water stuff (is it a solution, emulsion or mixture?) is drained into a jar. After a few weeks, it seems to separate out into three layes: a thin layer of oil(?) on...
by Gannet
Sat Jun 09, 2012 10:37 am
Forum: General Topics
Topic: Price/Value of Marston Seagulls
Replies: 28
Views: 3549

Price/Value of Marston Seagulls

I am fairly new to the Seagull world. However I would have thought that the Marston Seagull at present on e bay for £235 was very good value and I am very surprised that it hasn't been bought. Can somebody enlighten me as to what the usual prices for a Marston are; or what the possible problems are ...
by Gannet
Tue May 29, 2012 9:32 pm
Forum: Help
Topic: Piston orientation
Replies: 4
Views: 1480

Re: Piston orientation

Thanks for that info. I haven't removed the gudgeon pin from the piston, so that was one part I couldn't muddle up.
The motor is an FV.
Cheers

Jeremy
by Gannet
Tue May 29, 2012 7:55 pm
Forum: Help
Topic: Piston orientation
Replies: 4
Views: 1480

Piston orientation

I have been a bit silly. In removing the piston from the con rod on my Forty, I didn't make a note of which way round it goes - it seemed obvious at the time. Now however on re-assembly it isn't obvious!
Does the high 'step' part of the piston crown go by the inlet or exhaust port?
Thanks.

Jeremy
by Gannet
Fri May 18, 2012 2:53 pm
Forum: General Topics
Topic: weight, not oil but motor
Replies: 17
Views: 5065

Re: weight, not oil but motor

Hi,
You could consider a Forty Minus. The sales brochure states 26lbs (ie 11.8kg).
My SJM weighs about this(just checked it with a spring balance) and is certainly good for my 8ft pram dinghy.
Cheers
Jeremy
by Gannet
Mon May 07, 2012 9:49 pm
Forum: General Topics
Topic: Corrosion neautralization
Replies: 12
Views: 2790

Re: Corrosion neautralization

Painting the aluminium surface underneath the leather/rubber washer with a chromate primer which should be very effective. Chromate is a paint specifically for aluminium. In addition, as has been suggested use a waterproof grease or a natural waterproof like lanolin.

Jeremy
by Gannet
Sun May 06, 2012 2:59 pm
Forum: Help
Topic: Compression values
Replies: 18
Views: 5227

Re: Compression values

Thanks for all the interesting comments. It is strange that the ali heads don't (?) seem to suffer the same corrosion level as the crankcase inspite of being connected to a copper gasket. I was also wondering whether the ali spec was diferent, resulting in enhanced corrosion resistance. Although I w...