seal kits for Merc 800/ engine woes.

[oldglastron]

I am working on a Mercury 800 (80hp) 4 cylinder. Serial 3190060.
I am looking for a lower unit seal kit, a trim\ tilt unit reseal kit and complete water pump kit with housing. I am finding that the serial numbers for the part kits start at serial 419xxxx. I know it is getting harder to find parts for these. but if anyone knows please help a guy out. The quicksilver book did list the water pump kit as available I will try to cross reference with I boats.

My second question I am having some top end issues the boat planes out ok but top speed is slow like 20mph. If I advance the distributer by hand it does improve some but the engine sputter a bit. It has overhauled carbs and fuel pump. (updated pump kit) A new internal harness from CDI. a wire set with all the terminals also has new NGK plugs. Looks like a new distributor housing The timing looks to be correct and it does seem to be synched per FSM. I am going to leak down the case. The compression numbers were all close on all cylinders. I even installed new bleed restrictors and side cover gasket. I have cleaned and checked the distributor cap and rotor also it has a new center contact/bushing kit. I am hoping a leak down will tell me more. I am also not getting more that 2700 revs out of the engine to. We are at 5000ft CO.

 

[carholme]

Re: seal kits for Merc 800/ engine woes.

That s/n comes up as:

80 1972 E S&L 3186283 - 4831998

From here:

MERCURY OUTBOARD MODEL YEAR GUIDE 60 HP - 100 HP -- Mastertech Marine

Parts List:

MERC 800E - Mercury, Mercruiser, Force, etc. Parts Lookup

Where applicable in the parts list they will identify above and below a certain s/n. Kits are not always available but you can order the individual parts you require.

Here is a link to the condensed version of the Clymer manual. Download it soonest to your computer as the link is short lived.

See altitude adjustments for your engine under All Models Prior To 1976. You can check the size of jet presently installed and in the parts list you will see a selection of jets under Carburetor.

You will also see that the WOT range is from 4800-5500 rpm.

Gerry