Is it compatible 3.5 HP engine with the boat? (mariner 4) if yes , when i used %30 of power just alone back side go down and can not control properly . engine is TOHATSU M 3.5 S

24/1 is the correct ratio. I certainly wouldn't go 50/1 but you could split the difference with a good synthetic.

1957 Johnson Seahorse QD18 10hp Oil Mixture - Marine ...

http://www.marineengine.com > showthread > 10690-1...
May 6, 2004 - " First: Anyone know for sure the oil/gas ratio for a 57 10hp Seahorse, is it 24:1 or 50:1??? Second: The motor has been sitting for about ...
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1957 Johnson QDL-18 10hp (recommended oil and ratio)

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Product Knowledge Handbook - Mercury Marine

www.mercurymarine.com > pdf > Mercury-Outboards
PDF
Specifications, features, and options are subject to change without notice. ... Connecting Rod: Linkage that connects the crank to the piston in an engine or ... crankshaft main bearing cap is secured by four bolts, rather than the standard two, for ... Found on all Mercury Marine 4-stroke ... At top speed, Mercury 50hp Four.

mercury torque specs - The Hull Truth - Boating and Fishing ...

www.thehulltruth.com > ... > The Boating Forum

Nov. 3, 2017 - The Boating Forum - mercury torque specs - im looking for mercury powerhead torque ... Proportional Serif, Monospace Serif, Casual, Script, Small Caps ... sorry for the novice question, but is this correct for marine engines? if so, ... 4-16 - titled POWERHEAD Crankshaft, Pistons and Connecting Rods (4 Cyl.) ... Missing: 2013 ‎cap

40/50/60 FourStroke - Brunswick Marine in EMEA Download ...

download.brunswick-marine.com > outboard > 4-stroke

PDF information. The description and specifications contained herein were in effect ... Name of engine manufacturer: Mercury Marine Technology Suzhou Co., Ltd. Address: ... 4 stroke. Identification of Engines Covered by This Declaration of. Conformity. Name of ... in loosening or disengagement of the steering link rod. This can.

torque specifications for 1983 50 hp mercury outboard for ...

forums.iboats.com > ... > Mercury & Mariner Outboards

Jul. 17, 2013 - I think those bolts are 5/16 and for clean dry threads 20 ft-lbs is roughly the rating. That's for a grade 5 (3 marks on the head) but marine engines ...

Hi. Uncertain if you own a runabout or a larger boat but this might help. Because you have tried both control positions for the trim adjust, I suspect the trouble lies with 1. power to hydraulic pump (or electric ratchet motor if so equipped)
2. frozen, corroded or stuck trim plates or transom mount swivel points.
3. Check for correct levels of hydraulic fluid in system or test for correct voltage to ratchet motor(s) if this is the system used. Use a jumper cable to directly power the motors or activators if low, or irregular voltage found. Test again.
4. Any obstruction or debris deposition at or near the working parts.
Finally, a local marine mechanic will tell you what is wrong and the cost to fix.
Hope this helps.

Sounds like it has a fuel restriction. Hook up a fuel pressure gauge on the vst tank on the motor to make sure you have 30-50 lbs of fuel pressure.

Evinrude 50 HP Bogs at WOT - MarineEngine

www.marineengine.com > ... > Johnson Evinrude Outboard Archive

Aug 6, 2002 - 17 posts - ‎3 authors
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motor bogs down at full throttle Page: 1 - iboats Boating Forums ..

If your old engine/control has the same 'options' as the30hp, yes everything is compatible... (Electric start or trim )
The throttle and shift cables are allways compatible...

Water gets in your engine through the exhaust with the boat speed! Lift that engine when not in use!

broken/missing return throttle spring
jammed throttle cable

While looking at the engine from the side or from an overhead view, the #1 cylinder will always protrude slightly further to the front. In other words, the valve cover and head that has less room behind the water pump and sticks out further is #1. Firing order 1-8-4-3-6-5-7-2 is the same.

no. my 28 lb 3.5 tohatsu strains the pvc material that the tubes are made out of pretty well. the weight and thrust of the motor pulls pretty hard on these tiny little rubber "feet" glued to the tubes. I usually dont even run full throttle as it looks like i will pull the motor mount feet right off the tube. I couldn't imagine a bigger, heavier motor than what i am running working out well in the long run.
i have the intex mariner 4, btw.