MHP JNR User Manual

24 

 

 

After a period of nonuse or to keep your grill in top 
operating condition, you should perform the following 
maintenance procedures to keep the grill ready for 
instant use and for your safety. 

•

Do not obstruct the flow of combustion and ventila-
tion air. 

•

Clean inside the grill head. Remove the burner/
venturi assembly and cover the valve orifices with a 
piece of aluminum foil to keep out dirt. Brush inside 
bottom and sides with a stiff wire brush to remove 
built-up grease and debris. Be careful not to dam-
age the Ignitor or Collector Box. 

•

Test the Ignitor for a good spark. (See Rotary 
Spark Ignitor System in the General Maintenance 
section.) 

•

The stainless steel burner may be brushed lightly 
with a stiff laundry brush. Any clogged flame holes 
may be opened using a thin wire. Use the supplied 
venturi cleaning brush or a bottle brush, pipe 
cleaner to clean out the venturis. (See Flashback in 
General Maintenance.) 

•

Clean the Control Panel, Side Shelf Supports, Lid 
Handle Spacers, Lower Cart Frame, Posts with a 
mild detergent soap and warm water solution. For 
the Optimum Console use a mild detergent soap 
and water, Windex or a quality stainless steel 
cleaner such as MHP’s Stainless Steel Cleaner 
(Part #SSC) to clean the column and grill lid facing. 
Do Not Use cleaning agents such as bleach, 
powdered cleansers, steel wool pads or caustic 
solutions like oven cleaners because they will 
damage the surfaces. 

•

Porcelain cooking grids should be cleaned by first 
pre-heating the grill on high for ten minutes, lid 
closed. Then with a brass bristled grill brush clean 
off the debris. Do Not wash the porcelain grates in 
a sink or dishwasher. It may ultimately cause the 
porcelain to chip. 

•

Occasional white oxidation on the exterior of your 
grill head and lid may be washed off with mild soap 
and warm water. 

•

Severe weathering of the grill head and lid can be 
remedied by lightly sanding or rubbing with steel 
wool. Then it can be recoated with a high quality 
heat resistant paint similar to MHP’s BF-1 Paint, 
available in spray cans from your dealer. 

•

Inspect the hose and gas fittings. Remember to 
leak check every time you disconnect and recon-
nect a gas fitting. 

•

Keep the ventilation openings of the LP cylinder 
enclosure free and clear from debris. 

In some areas of the country, spiders and other in-
sects build nests, lay eggs  and spin webs in the grill’s 
venturi tube or valve orifice. This obstructs the full flow 
of gas to the burner. Some gas backs up resulting in a 
“Flashback” - a fire in the venturi behind the control 
panel which could cause serious bodily injury or dam-
age to your grill. 

 

 

 

 

 

 

To remove spider webs and/or other obstructions, you 
must clean out the venturis. This should be done 
routinely if the grill has sat idle for extended peri-
ods. Also, if you live in an area where spiders are 
plentiful, you should clean the venturis often, es-
pecially in the fall when there is an increase in egg 
sack production. 

To clean, be sure the grill is cold. Open lid and re-
move the cooking grids, the briquettes and the bri-
quette grate. 

1.

Remove the burner clip holding the burner in 
place. (See Fig. 42) 

2.

Lift burner and venturi assembly out. With sup-
plied cleaning brush, a pipe cleaner or a flexible 
wire, clean out the venturi tube. 

3.

Remove hex head orifice with a 3/8" wrench. 
Clean Orifice hole and inner part of the valve with 
a toothpick. Be careful not to enlarge the orifice 
hole.  

4.

Check orifice receptacle in valve body. 

 

When finished cleaning reassemble the complete unit. 

 

Check the hose before each use of the grill for nicks, 

cracking, abrasions or cuts. If the hose is found to be damaged in 
any way, do not use the grill. Replace using only MHP authorized 
replacement hose.