90hp Mariner What do I have?

[tugboat80]

New to boats, but I used to rebuild M48A3 tank engines. I just got a 90hp Mariner OB229356, pushes 110 psi all three clys. My tech put a new lower case seal kit and water pump in, cleaned carb float bowls, new 800 cca battery. Said it runs "bitchen". Enough money for a while.
Does this have a generator? A low or stoppage of oil VRO warning horn? Overheating horn? Where might I find a operator's and maint manual for THIS motor, not 600 other motors? It is on a 1984 Marlin open bow deep "V" fiber glass. How many knots might I hope for? Should it be run fast, slow, or in between in fresh water? How slow can these things go?
How do I work the controls at the Captain's Chair. It looks like the fore and aft lever some how controls both throttle and forward, neutral, and reverse gears.

 

[carholme]

Re: 90hp Mariner What do I have?

Your s/n comes up as:

90 B167519 - 1987

From here:

Mariner 60-350 hp, produktions?rslista, modellguide

Parts List:

70/75/80/90 H.P. (3 CYLINDER) - Mercury, Mercruiser, Force, etc. Parts Lookup

Service Manual you require is P/N: 90-13645-2. If you do not have the service or operations manual, see my message to you in Notifications at the top of this page.

Gerry

 

[Bob_VT]

Re: 90hp Mariner What do I have?

Well you are in the right place There are probably more 90hp Mariner's still running strong then there are M48's........ and you could not hang a M48 from a transom

You can probably hope for and see about 33-38 mph with that set up. Since we are talking about a 2 stroke......they like being run and like seeing wide open throttle (5000-5500 rpms). Don't lug the motor.

 

[tugboat80]

Re: 90hp Mariner What do I have?

:joyous:Right you are , El Supremo. I launched yesterday and a clean runner it is when breathing wide open. We got 35 mph windward and 36 to the lee. throttled down a quarter it hummed contentedly. I like this motor, the quietest two stroke I could imagine. To test the VRO I first loaded fuel from a premixed tank using non ethanol premium and fifty to one XD50. after a 1.5 gal run I examined the Mariner oil tank to verify that it had in fact lowered the level. It did. I next ran straight unleaded premium thru the carbs and once again checked the oil level on the eng. It had used a comparable amount. Fuel consumption I have not yet tested, but I have seen my money's worth so far.